1MRB520292 Uen Reb500sys Chap 5

REB500/REB500sys 1MRB520292-Uen/Rev. E

ABB Switzerland Ltd

March 07

5.

CONFIGURATION AND SETTINGS

5.1.

Introduction .............................................................................. 5-4

5.2.

“View” menu............................................................................. 5-4

5.3. 5.3.1. 5.3.2. 5.3.3. 5.3.4. 5.3.5. 5.3.6. 5.3.7. 5.3.7.1. 5.3.7.2. 5.3.7.3. 5.3.7.3.1. 5.3.7.3.2. 5.3.7.3.3. 5.3.7.3.4. 5.3.7.3.5. 5.3.7.3.6. 5.3.7.3.7. 5.3.7.3.8. 5.3.7.3.9. 5.3.7.4. 5.3.7.4.1. 5.3.7.4.2. 5.3.7.4.3. 5.3.7.4.4. 5.3.7.4.5. 5.3.7.4.6. 5.3.7.4.7. 5.3.7.4.8. 5.3.7.5. 5.3.7.6. 5.3.7.6.1. 5.3.7.6.2. 5.3.7.6.3. 5.3.7.6.4. 5.3.7.6.5.

“Configuration” menu ............................................................... 5-5 Configuration / Activate/deactivate device ............................... 5-5 Configuration / Isolators ........................................................... 5-5 Configuration / Circuit-breakers ............................................... 5-7 Configuration / Current transformers........................................ 5-9 Configuration / Voltage transformers ..................................... 5-10 Configuration / Device structure............................................. 5-10 Configuration / Binary module................................................ 5-12 Overview................................................................................ 5-12 Binary inputs .......................................................................... 5-13 Bay unit binary inputs............................................................. 5-18 General signals...................................................................... 5-18 Busbar Protection (BBP)........................................................ 5-22 Breaker failure protection (BFP) ............................................ 5-22 End fault protection (EFP)...................................................... 5-24 Time-overcurrent (OCDT) ...................................................... 5-24 Disturbance recorder (DR)..................................................... 5-24 Circuit-breaker pole discrepancy protection (PDF) ................ 5-25 Voltage release (UV).............................................................. 5-25 Bay protection (BP) (REB500sys only) .................................. 5-25 Central unit binary inputs ....................................................... 5-26 General signals...................................................................... 5-26 Busbar protection (BBP) ........................................................ 5-28 Breaker failure protection (BFP) ............................................ 5-29 End fault protection (EFP)...................................................... 5-29 Time-overcurrent protection (OCDT) ..................................... 5-29 Disturbance recorder (DR)..................................................... 5-29 Circuit-breaker pole discrepancy protection (PDF) ................ 5-29 Bay protection (BP) (REB500sys only) ................................. 5-29 Binary outputs........................................................................ 5-29 Binary outputs on the bay units.............................................. 5-34 General signals...................................................................... 5-34 Busbar protection (BBP) ........................................................ 5-36 Breaker failure protection (BFP) ............................................ 5-36 End fault protection (EFP)...................................................... 5-37 Time-overcurrent protection (OCDT) ..................................... 5-37 5-1

ABB Switzerland Ltd

REB500/REB500sys 1MRB520292-Uen/Rev. E

5.3.7.6.6. 5.3.7.6.7. 5.3.7.6.8. 5.3.7.6.9. 5.3.7.7. 5.3.7.7.1. 5.3.7.7.2. 5.3.7.7.3. 5.3.7.7.4. 5.3.7.7.5. 5.3.7.7.6. 5.3.7.7.7. 5.3.7.7.8. 5.3.8. 5.3.9. 5.3.9.1. 5.3.9.2. 5.3.9.3. 5.3.10. 5.3.11. 5.3.12.

Disturbance recorder (DR)..................................................... 5-37 Circuit-breaker pole discrepancy protection (PDF) ................ 5-38 Voltage release (UV).............................................................. 5-38 Bay protection (BP) (REB500sys only) .................................. 5-38 Central unit binary outputs ..................................................... 5-39 General signals...................................................................... 5-39 Busbar protection (BBP) ........................................................ 5-41 Breaker failure protection (BFP) ............................................ 5-42 End fault protection (EFP)...................................................... 5-42 1^21324567890Time-overcurrent protection (OCDT)............ 5-43 Circuit-breaker pole discrepancy protection (PDF) ................ 5-43 Voltage release (UV).............................................................. 5-43 Bay protection (BP) (REB500sys only) .................................. 5-43 Configuration / Event text....................................................... 5-43 Configuration / Disturbance recorder ..................................... 5-44 Analog inputs ......................................................................... 5-44 Recording .............................................................................. 5-45 Signals ................................................................................... 5-45 Configuration / HMI LED's ..................................................... 5-48 Configuration / CB inspection ................................................ 5-50 Configuration / GPS time synchronization ............................. 5-51

5.4. 5.4.1. 5.4.2. 5.4.2.1. 5.4.2.2. 5.4.2.3. 5.4.2.4. 5.4.3. 5.4.3.1. 5.4.3.2. 5.4.3.3. 5.4.3.3.1. 5.4.3.4. 5.4.3.5. 5.4.3.6. 5.4.3.7. 5.4.3.8. 5.4.4. 5.4.5. 5.4.6. 5.4.7. 5.4.8. 5.4.9. 5.4.10.

Settings and calculations ....................................................... 5-51 Rated frequency (not adjustable) ........................................... 5-51 Settings / System response ................................................... 5-51 System response to a differential current alarm..................... 5-51 System response to an isolator alarm.................................... 5-51 Isolator alarm delay................................................................ 5-52 Remote trip impulse width...................................................... 5-53 Busbar protection (settings and calculations) ........................ 5-54 Restrained amplitude comparison - IKmin and k ................... 5-55 Application example............................................................... 5-56 Busbar with just two bays ...................................................... 5-58 Busbar with several bays ....................................................... 5-58 Busbar fault with through current ........................................... 5-60 Differential current alarm setting ............................................ 5-62 Differential current alarm delay setting................................... 5-62 Neutral current supervision (operating characteristic L0)....... 5-62 Phase comparison ................................................................. 5-62 Overcurrent check for enabling tripping ................................. 5-63 Undervoltage check for enabling tripping............................... 5-63 Voltage release / External release ......................................... 5-63 Bay protection (BP) (REB500sys only) .................................. 5-63 Breaker failure protection (BFP) ............................................ 5-63 End fault protection (EFP)...................................................... 5-63 Time-overcurrent protection (OCDT) ..................................... 5-63 5-2

REB500/REB500sys 1MRB520292-Uen/Rev. E

5.4.11. 5.4.12.

ABB Switzerland Ltd

Circuit-breaker pole discrepancy function (PDF) ................... 5-63 Event memory........................................................................ 5-63

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REB500/REB500sys 1MRB520292-Uen/Rev. E

5.

CONFIGURATION AND SETTINGS

5.1.

Introduction HMI500 is the human-machine interface (HMI) for the protection systems REB500 and REB500sys. For brevity, these operating instructions refer simply to REB500 although the program applies to both systems. There are additional menu items, which only apply to REB500sys, and attention is explicitly drawn to these. The REB500 busbar protection system is configured on the basis of the customer’s specification resulting from his response to a questionnaire. The following information is intended to enable the user to understand the choice of REB500 settings and to follow their calculation. The basic configuration of the REB500 system is performed by ABB. There are some additional settings that the user has to make. In this section, the various menus and submenus are explained that require settings or the input of text by the user.

5.2.

“View” menu

Fig. 5.1

Single-line diagram in the “View” menu

Right clicking an item opens a dialogue for changing its label.

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5.3.

“Configuration” menu

Fig. 5.2

5.3.1.

ABB Switzerland Ltd

Menu items in the configuration menu

Configuration / Activate/deactivate device This menu item is used to configure REB500 so that it agrees with the actual state of the primary system in the station (e.g. when additions are made to the station) (see Section 7.6.).

5.3.2.

Configuration / Isolators Changing isolator labels.

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REB500/REB500sys 1MRB520292-Uen/Rev. E

Overview

Fig. 5.3

Configuration – Isolators - Overview

The “Overview” tab opens a dialogue with a list of all the isolators in the single-line diagram with their labels and bay unit labels. An isolator in a particular bay can be viewed by activating the check box “Feeder filter” and selecting a bay from the list. Details

Fig. 5.4 5-6

Configuration - Isolators - Details

REB500/REB500sys 1MRB520292-Uen/Rev. E

ABB Switzerland Ltd

The label in the “Markings” field of the “Details” dialogue can be edited. 5.3.3.

Configuration / Circuit-breakers Overview

Fig. 5.5

Configuration - Circuit-breakers - Overview

All the feeder circuit-breakers and bus-tie breakers shown in the single-line diagram are listed in this dialogue together with their labels, bay labels, type of circuit-breaker (feeder or bus-tie) and the circuit-breaker reclaim time. When “Extended blocking function for bus tie-breaker” is set to “No”, the measurement of current by the busbar protection is enabled regardless of the feeder circuit-breaker. When set to “Yes”, the measurement of current by the busbar protection is enabled or disabled depending according to the position of the circuit-breaker. In this case, configuring the signal “11505_Close command CB” is imperative. Details The label in the “Label” field can be edited and the reclaim time for each circuit-breaker is entered in the corresponding field (see setting instruction below).

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REB500/REB500sys 1MRB520292-Uen/Rev. E

NOTE: The blocking (reclaim) time is determined as follows: Reclaim time = bus-tie breaker operating time + arc extinction time + 60 ms (60 ms = total transmission time + safety margin)

Parameter

Min.

Max.

Default

Step

Unit

Reclaim time

20

300

120

20

ms

Table 5.1

Range of the reclaim time setting for circuitbreakers

Fig. 5.6

Configuration - Circuit-breakers – Details

NOTE: The operation of feeder and bus-tie breakers and the reclaim time are described in detail in Section 3.8.7.

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5.3.4.

ABB Switzerland Ltd

Configuration / Current transformers Changing the CT labels and ratios. Overview All the CTs shown in the single-line diagram are listed in this dialogue. Details

Fig. 5.7

Configuration - Current transformer - Details

The label in the “Markings” field can be edited. The ratios in the “Transformer ratio” fields are entered in terms of the primary and secondary rated currents. Min.

Max.

Step 1

Primary [A]

I1, I2, I3, I4

50

10000

Secondary [A]

I1, I2, I3, I4

1

5

The secondary setting is only for information. The selection of 1 A or 5 A as the secondary rating is achieved by appropriately connecting the CT inputs on the REB500 bay unit (see Section 3.3.3.).

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5.3.5.

REB500/REB500sys 1MRB520292-Uen/Rev. E

Configuration / Voltage transformers This menu item is only available when VTs are installed (see Section 11.8.).

5.3.6.

Configuration / Device structure The device structure is configured by ABB when engineering the system. This dialogue is only for information as the configuration cannot be changed. Overview The central unit and all the bay units are listed together with their labels and type. The desired unit is selected by clicking the mouse on it.

Fig. 5.8

Configuration - Device structure - Overview

Details The “Details” dialogue shows the function and ABB reference for every type of module. The node ID indicates the assignment of the module on the process bus.

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ABB Switzerland Ltd

Bay unit

Fig. 5.9

Configuration - Device structure – Bay unit

Central unit

Fig. 5.10

Configuration - Device structure – Central unit

The list for the central unit shows whether the modules are masked or unmasked. Refer to Section 3.3.2. “Central unit modules” for further information. 5-11

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5.3.7.

REB500/REB500sys 1MRB520292-Uen/Rev. E

Configuration / Binary module This dialogue is used while engineering the protection system to configure the binary modules. The data entered are normally provided in the questionnaire filled in by the user. The window has three tabs: • • •

5.3.7.1.

Overview Inputs Outputs

Overview

Fig. 5.11

Configuration - Binary module - Overview

The overview tab opens a list with all the binary I/O modules for which the following information is given: • •

ABB ref. Feeder

• • •

Device Slot No. Module type

(ABB designation for the bay or central unit) (in which the bay unit is located, user’s label for the bay) (label) (module location in the bay or central unit) (designation).

These attributes cannot be changed.

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5.3.7.2.

ABB Switzerland Ltd

Binary inputs The overview provides facility for entering the auxiliary supply voltage (battery voltage) and viewing the assignment of the binary inputs. Overview (of input signals for each device)

Fig. 5.12

Configuration - Binary module - Central unit inputs

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Fig. 5.13

REB500/REB500sys 1MRB520292-Uen/Rev. E

Configuration - Binary module - Bay unit inputs

The upper part of this dialogue contains a general layout of the respective module. The auxiliary supply voltage for each group of opto-couplers (with a common pole) is entered below this. All the input signals assigned to the module are listed. Deleting a signal A signal is deleted by marking it in the window and clicking on the “Delete” button.

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Details

Fig. 5.14

Configuration - Binary module - Inputs - Details

Signal allocation The “Details” dialogue provides facility for allocating opto-coupler inputs to the logical input signals and the event memory of every input/output module. The abbreviations C.x and O.x denote the CLOSE and OPEN auxiliary contacts on the isolator or circuit-breaker respectively as they appear in the “Details” dialogue. Where an isolator or a circuit-breaker is only equipped with a single auxiliary contact, the “One auxiliary contact” mode must be selected. This mode is not recommended because the status of the isolator or circuit-breaker cannot be properly monitored with just one auxiliary contact. The signals are configured at the time the protection system is engineered and are generally not changed subsequently. Only the CLOSED signal field is visible when the “One auxiliary contact” mode is selected. The function of the OPEN signal is achieved by inverting the CLOSED signal. In this case, we recommend connecting the auxiliary contact supply to the corresponding input so that its integrity is supervised.

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REB500/REB500sys 1MRB520292-Uen/Rev. E

Inversion The signals of opto-coupler inputs can also be inverted. Configuring events Every signal can also be saved as an event in one or more event memories (see Section 5.4.12. “Event memory”). More check boxes and input fields appear when the “Recording” radio button is selected. They determine whether the event is recorded on the positive or negative-going edge or on both edges. The user can enter a text (up to 32 characters) defining the event, but if none is entered the system assigns a default event text. At least one event memory in the “Send event to” (= save event in) field must also be selected either in the CU and/or BU event memories. Furthermore, events can be assigned to the event lists of interbay bus (IBB) 1 and/or 2. Minimum input signal duration Provision is made for prolonging the input signals in steps of 1 ms (reset delay). New Signal

Fig. 5.15

Configuration - Binary module - Inputs New signal

The “New signal” button opens a dialogue with a list for selecting and adding a new signal. Clicking on the arrow to the right of the “Signal type” field opens a list of available signals. The effective list depends on the functions ordered by the user.

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ABB Switzerland Ltd

The list can include as a maximum the following groups: •

General signals

•

Busbar protection (BBP)

•

Breaker failure protection (BFP)

•

End fault protection (EFP)

•

Time-overcurrent protection (OCDT)

•

Disturbance recorder (DR)

•

CB pole discrepancy protection (PDF)

•

Voltage release (UV)

•

Bay protection (BP) (REB500sys only)

Signals that can only be assigned once disappear from the list as soon as the user has assigned them once. Clicking on the arrow button to the right of the signal name field opens a list of the signals available according to the filter group and module selected. Click on “OK” to confirm the choice or on “Cancel” to close the window without making a choice. The “Details” dialogue opens automatically upon clicking on the “OK” button. The new signal can now be assigned to an opto-coupler and inverted if necessary. Configuring opto-coupler events In addition to events generated by function signals, a physical input can also be configured as an event. This is of advantage, for example, when several signals are assigned to a physical input or when ambivalent signals from isolators or circuit-breakers need to be recorded. The “Overview” dialogue provides facility for this kind of assignment. First select an opto-coupler in the “Overview” dialogue by clicking on it above the signal list (column marked). Now click on the “OC event config.” button to open the “Configuration of events” window.

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5.3.7.3.

REB500/REB500sys 1MRB520292-Uen/Rev. E

Bay unit binary inputs The following input signals are listed in ascending order in their respective filter groups.

5.3.7.3.1.

General signals 11105_External TRIP This signal is a tripping command received from another protection device (including one in the remote station) and is used for the REB500 tripping contact to trip faults on a line or a power transformer (see Section 11.17.5.). 11110_External TRIP BB zone This input is used when an external signal has to trip the entire bus zone to which the feeder is connected (e.g. for an external BFP signal). It is applied to all the bay units of the bus zone and sections of busbars connected by an isolator trip together (intertripping). 11115_Ext_Test_TRIP This binary input activates the signal 21120_EXT_TEST_TRIP which to operate several tripping relays simultaneously. 11120_AS Ext. TRIP This is the tripping signal generated by the feeder protection part of REB500. It trips faults on a line or power transformer with the aid of the REB500 tripping contact. Tripping thus takes account of the busbar configuration at the time (see Section 11.17.5.). To function correctly, the signal has to be assigned to a feeder. The simplest arrangement corresponds to the assignment of the signal 11105_Ext. TRIP to feeders. If signal 11105_Ext. TRIP is not available, a binary output has to be configured for 11120_AS Ext. TRIP which is then assigned to a feeder. The signal is activated by the feeder protection directly and does not therefore appear as binary input signal.

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11205_Block SP A signal applied to this input blocks the local station protection functions (BFP, EFP, OCDT and PDF), “External Trip”, tripping by the busbar protection and intertripping of the respective bay unit. NOTE: The Bus Bar Protection continues to be active as a system function. The primary injection of the concerned bay unit can lead to a trip of the respective zone. 11210_Block output relays All the output contacts configured for a bay unit are blocked. 11215_Ext. measuring disturbed This signal is active when invalid analog values are received from an external device. The busbar protection (i.e. the specific protection zone of the busbar) and all the local protection functions are blocked. If the disturbance lasts longer than 400 ms, diagnostic events are generated (BBP Minor Error 7 and BBP Minor Error 29). This input should only be used in special cases and only when engineering a REB500 system. 11505_Close command CB The circuit-breaker close command is needed by the busbar and end fault protection functions in bus-tie breaker and configured feeder bay units to control the REB500 measuring system (see Section 3.8.7.). 11510...11525_Supervision aux. voltage_x The supervision of the auxiliary supply is configured when the compliance of the auxiliary contacts on the isolators with the required switching sequence cannot be guaranteed and for this reason the “Not CLOSED = OPEN” logic has to be used. These signals ensure that the protection responds correctly should the auxiliary supply to the isolators fail. This signal is only applicable in the case of “Not CLOSED = OPEN”!

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REB500/REB500sys 1MRB520292-Uen/Rev. E

11530_Isolator/Breaker Position The position of a circuit-breaker or an isolator is signaled by one or two auxiliary contacts (see Section 3.7.4.). 11605_External release Trip Providing they have been configured, a signal applied to this input enables tripping by the busbar protection and the intertripping function in the bay unit (AND logic of tripping and enabling signals). The input has no influence on other protection functions. This input can be used in special cases to interlock tripping by the protection by, for example, an external undervoltage relay. 11610_External reset Tripping commands and signals can be configured to latch after picking up, in which case they must be reset by applying a signal to this input. It also resets the text display and LED’s on the local control unit. A reset signal resets the entire system. 11615, 11625, 11635, 11645_Inspection_x-Off These inspection inputs (x = 1 to 4) activate the isolator or circuit-breaker inspection mode for the cases 1 to 4. As with the isolator inputs for the busbar image, two anticoincident signals can be connected to these inputs. The last valid position is maintained and a failure is signaled on the local HMI on the bay unit if both inputs are the same. These signals are only used when anticoincidence supervision of the inspection inputs is specified. The following signal pairs result in relation to the inspection cases. Status

Inspection 1

Inspection 2

Inspection 3

Inspection 4

OPEN

11615

11625

11635

11645

CLOSED

11620

11630

11640

11650

Table 5.2

Signal pairs supervised for anticoincidence

Refer to Section 11.12. “Inspection and maintenance”. 11620, 11630, 11640, 11650_Inspection_x-On These inspection inputs (x = 1 to 4) activate the isolator or circuit-breaker inspection mode. 5-20

REB500/REB500sys 1MRB520292-Uen/Rev. E

ABB Switzerland Ltd

They are only used both in cases where there is only one inspection signal (without anticoincidence supervision) and where there are anticoincidence signals (with anticoincidence supervision) (see Table 5.2). Refer to Section 11.12. “Inspection and maintenance”. 11655_Maintenance-Off Anti-coincident maintenance input. Refer to the description for the “Inspection_x-Off” signals. Refer to Section 11.12. “Inspection and maintenance”. 11660_Maintenance-On This input is excited by the maintenance function. It is used should only one maintenance signal be available. Refer to Chapter 8 “Operation and maintenance” for a detailed description of the maintenance function. Refer to Section 11.12. “Inspection and maintenance”. 11765_General Start DR This signal is configured in the bay unit and together with the input signal “36705_General Start DR” from the central unit triggers the disturbance recorder in the bay unit. Without this signal, the bay unit does not respond to a general start of the disturbance recorder. It is only used for interlocking the general start signal for the disturbance recorder and may not be configured onto an optocoupler input. This is achieved by setting the mode to “No auxiliary contact” after opening the dialog “Binary module” and clicking on the tabs “Inputs” and “Details” (see Fig. 5.14). 11840…11885_GP_In_x With a properly configured event configuration, the input signal can be transmitted via LON or IEC103 and displayed on the control system. It is also possible to display the state of the signal on the local HMI LED’s of the bay unit.

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5.3.7.3.2.

REB500/REB500sys 1MRB520292-Uen/Rev. E

Busbar Protection (BBP) 12605_Bypass Check Zone The check zone criterion for the release of the bus bar protection is bypassed.

5.3.7.3.3.

Breaker failure protection (BFP) 13205_Block BFP The operation of the breaker failure protection is blocked for the corresponding bay unit. When the blocking signal is cancelled, the timers start again at t = 0. 13210_BP Block BFP This signal is directly activated by the feeder protection unit and doesn’t therefore appear as a binary input signal. The operation of the breaker failure protection of the corresponding feeder is blocked. When the blocking signal is cancelled and providing a starting signal is present and current is flowing, the timers start again at t = 0. 13605_Trip transferred The circuit-breaker sets this input when it cannot open, for example, because the air pressure is too low or there is a leak in the case of GIS (Alarm Stage 3 - Circuit-breaker blocked). A tripping signal is then transferred to the adjacent breakers (busbar trip) and possibly the remote station (see Section 11.1.3.2.). 13610_BP Trip transferred Reserved for special applications. This signal is directly activated by the feeder protection unit and does not therefore appear as a binary input signal. 13705_External Start BFP A signal applied to this input starts the breaker failure protection timer (independently of the overcurrent measurement).

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13710...13735_Start BFP Lp_x Phase-selective (p = 1 to 3) starting of the breaker failure protection with two inputs per phase (x = 1 to 2). The breaker failure timer is started by this input signal providing the current in the respective phase is above pick-up. 13740...13765_Start BFP L1L2L3_x Three-phase starting of the breaker failure protection by six inputs (x = 1 to 6). The breaker failure timer is started by a signal at one of these inputs providing the current in at least one phase is high enough. 13770...13780_Start BFP Lp Breaker failure protection with phase-selective starting (p = 1, 2 or 3). The breaker failure protection timer starts when this signal is activated by feeder protection function and the BFP measures a current in the corresponding phase. This signal is directly activated by the feeder protection unit and does not therefore appear as a binary input signal. 13785_BP Start BFP L1L2L3 Breaker failure protection with three-phase starting. The breaker failure protection timer starts when this signal is activated and the BFP measures a current in any phase. This signal is directly activated by the feeder protection unit and does not therefore appear as a binary input signal. 13790_BP Ext. start BFP L1L2L3 Breaker failure protection with three-phase starting. The breaker failure protection timer starts when this signal is activated regardless of the current measurement. This signal is directly activated by the feeder protection unit and does not therefore appear as a binary input signal.

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5.3.7.3.4.

REB500/REB500sys 1MRB520292-Uen/Rev. E

End fault protection (EFP) 14205_Block EFP The operation of the end fault protection is blocked for the corresponding bay unit. When the blocking signal is cancelled, the timers start again at t = 0. 14405_AS EFP Manual Close This signal is set by the bay protection when the circuit-breaker receives a close command to prevent the end fault protection function from tripping.

5.3.7.3.5.

Time-overcurrent (OCDT) 15210_Block OCDT The operation of the time-overcurrent function is blocked. When the blocking signal is cancelled, the timer starts again at t = 0.

5.3.7.3.6.

Disturbance recorder (DR) 16705...16750_Start DR_x The disturbance recorder function is started by an external signal applied to one of these 10 inputs (x = 1 to 10), or they can be simply used for recording purposes. The external signal may come, for example, from the tripping contact of a bay protection relay or the starting contact of a time-overcurrent relay. Optocouplers are configured for these inputs. The signal “16750_Start DR_10” is also transferred to the central unit where it initiates the general start of all disturbance recorders. 16760_BP Central start DR Those disturbance recorders in the bay units that are configured start. The signal ‘Central start DR’ in the bay units must be configured. This signal is directly activated by the feeder protection unit and does not therefore appear as a binary input signal.

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5.3.7.3.7.

ABB Switzerland Ltd

Circuit-breaker pole discrepancy protection (PDF) 17205_Block PDF The operation of the circuit-breaker pole discrepancy protection is blocked. The timers start at t = 0 again when the input resets. 17710_Start PDF Providing this input is configured, the circuit-breaker pole discrepancy protection is started or enabled by an external signal (see Section 11.4.).

5.3.7.3.8.

Voltage release (UV) 18205_Fuse failure superv. UV Provision is made for a tripped m.c.b. to apply a signal to the input “18205_Fuse failure superv. UV” and enable tripping of the protection zone concerned (see Section 12.9.).

5.3.7.3.9.

Bay protection (BP) (REB500sys only) 19205_Block BP The protection output signals of the respective bay unit are blocked. (Internal processing of the functions continues and therefore measurements and signals continue to be displayed on the local HMI.) 19600_Activation BP ParSet_1 The protection functions and settings assigned to parameter set 1 are active. They remain active after the signal has been reset. 19605_Activation BP ParSet_2 The protection functions and settings assigned to parameter set 2 are active. They remain active after the signal has been reset. 19610_Activation BP ParSet_3 The protection functions and settings assigned to parameter set 3 are active. They remain active after the signal has been reset.

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19615_Activation BP ParSet_4 The protection functions and settings assigned to parameter set 4 are active. They remain active after the signal has been reset. BP input signals available for configuration In addition to the bay protection input signals listed above, which are always available, use can also be made of the signals configured for the binary signal input block of the bay protection. The number of these signals depends on the protection functions and signals included in the bay protection (see Section 12.1. “Application description”). 5.3.7.4.

Central unit binary inputs The following input signals are listed in ascending order in their respective filter groups. Most central unit signals can only be assigned once. However, two input signals (“31105_External TRIP BB zone” and “31805_External release BB zone”) occur for each busbar zone. Thus the busbar section must be given when selecting one of these signals.

5.3.7.4.1.

General signals 31105_External TRIP BB zone (BB zone tripped by external signal) A busbar section can be tripped by a signal applied to this input. Up to 32 sections can be addressed. One input can be configured for each section. Sections connected by isolators are tripped together (intertripping). 31205_Block SP The station protection (SP) functions (BBP, BFP, EFP, OCDT and PDF) including “External Trip”, “External TRIP BB zone” and intertripping are blocked throughout the system. 31210_Block output relays All the output contacts configured for the central unit and all the bay units are blocked, i.e. the current status of the relays is maintained.

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31215_Block IEC master direction REB500 does not transfer any events, error messages, measurements etc., to the master station via the station bus IEC 60870-5-103 when this input is active. 31505_Accept bus image alarm This signal acknowledges (resets) an isolator alarm. If it is continuously active, a new isolator alarm is immediately reset (see Section 3.7.4.). 31805_External release BB zone This input enables the tripping signal for a section of busbar (AND gate with tripping and enabling inputs). One of these inputs can be configured for each busbar section. The entire protection zone surrounding the busbar section is enabled (transfer tripping). Sections connected by isolators are also enabled (transfer tripping). The input can be used in special cases, for example, to interlock the tripping signal by an undervoltage relay. This will generally delay tripping (see Section 11.10.). 31230_Block BB zone With this signal of the bus bar protection the inter-tripping and the external trip of the BB block is blocked. A maximum of 12 bus zones resp. blocking signals can be configured in one BIO unit. A complete bus zone in which the BB block is located would be blocked (inter-tripping). If the bus block is associated with an isolator then it is also blocked (inter-tripping). The input operates with a time delay of up to 300 ms. 31810_External reset Tripping commands and signals can be configured to latch and when they are, they are reset by a signal applied to this input. The same signal also resets the LED’s (alarm and tripping). The reset signal applies to the entire system. 31815_Ext. superv. in service_1 Input for monitoring any fans, external supplies etc. The signal “41805_Alarm” is set in the central unit when this signal changes from logical “1” to “0”.

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31820_Ext. superv. in service_2 Input for monitoring any fans, external supplies etc. The signal “1805_Alarm” is set in the central unit when this signal changes from logical “1” to “0”. 31825_Time minute synchr. Clock synchronization input. Synchronization takes place on the positive edge of a minute impulse. The impulse must be at least 20 ms wide. Should this signal be configured in a bay unit, but either not connected or has otherwise failed, the error “TIM Minor Error 022” is signaled on the local HMI. 31830_Time second synchr. Clock synchronization input. Synchronization takes place on the positive edge of a one-second impulse. The impulse must be at least 20 ms wide. Should this signal be configured in a bay unit, but either not connected or has otherwise failed, the error “TIM Minor Error 021” is signaled on the local HMI. 31840…31885_GP_In_x With a properly configured event configuration, the input signal can be transmitted via LON or IEC103 and displayed on the control system.

5.3.7.4.2.

Busbar protection (BBP) 32205_Block BBP The busbar protection function is blocked throughout the system. 32605_Bypass Check Zone The check zone criterion for the release of the bus bar protection is bypassed.

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Breaker failure protection (BFP) 33210_Block BFP The breaker failure protection is blocked throughout the system. When cancelled, the timers start again at t = 0 providing the current is higher than setting.

5.3.7.4.4.

End fault protection (EFP) 34215_Block EFP The end fault protection is blocked throughout the system. When cancelled, the timers start again at t = 0 providing the circuit-breaker is open and the current higher than setting.

5.3.7.4.5.

Time-overcurrent protection (OCDT) 35220_Block OCDT The time-overcurrent function is blocked throughout the system. When cancelled, the timers start again at t = 0.

5.3.7.4.6.

Disturbance recorder (DR) 36705_General Start DR The disturbance recorders in all the bay units are started by this input if configured. The signal “General start disturbance recorder” must also be configured in the bay units.

5.3.7.4.7.

Circuit-breaker pole discrepancy protection (PDF) 37205_Block PDF The circuit-breaker pole discrepancy protection is blocked throughout the system. The timers restart at t = 0 when the signal is resets.

5.3.7.4.8.

Bay protection (BP) (REB500sys only) 39205_Block BP The bay protection output signals are blocked throughout the system. (Internal processing of the functions continues and therefore measurements and signals continue to be displayed on the local HMI.)

5.3.7.5.

Binary outputs The procedures for configuring binary inputs and outputs are almost identical. Therefore only the differences are dealt with in this section. 5-29

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Overview (output signals available on each device)

Fig. 5.16

Configuration - Binary module - Outputs - Overview - CU

Fig. 5.17

Configuration - Binary module - Outputs - Overview - BU

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The overview of the BU outputs shows which signals are assigned to which output relays. An output relay can be controlled by several signals (e.g. relay CR02 by “TRIP”, “BFP TRIP” and “AR Def. Trip.7”). For reasons of safety, it is impossible to mix tripping commands and signals, i.e. tripping commands can only be combined with tripping commands and control signals with control signals. Tripping commands: •

21105_EXTERNAL TRIP

•

21110_TRIP

•

23105_BFP TRIP

•

25105_OCDT TRIP

•

27105_PDF TRIP

•

Tripping signals generated by the bay protection functions. The remaining signals and all the CU signals are control signals.

NOTE: Configuring tripping signals for operating circuitbreakers either to latch or operate with a reset delay of at least 100 ms is recommended.

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Fig. 5.18

Configuration - Binary module - Outputs - Details CU

Fig. 5.19

Configuration - Binary module - Outputs - Details BU

This “Details” dialogue concerns the following functions. 5-32

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Signal delay Every output signal can be configured either to latch (until reset by a signal) or to have a defined reset delay. A reset delay can be entered in the field “t” and can be changed by clicking with the mouse. Blocking output signals throughout the system In the case of all the output signals being blocked by the selfsupervision function or a signal applied to the blocking CU or BU input “Block output relays”, the statuses of the selected output signals cannot change. This setting determines whether a signal is really blocked or is generated anyway. Relay output The current signal is assigned to the output relays with checked check boxes. Other signals of the same type (tripping command or control signal) may also be assigned to the same relay. Unavailable output relays (gray) already have signals of the other type assigned to them. The remaining relays are available for other signals. Event configuration The configuration of an output signal event is the same as for an input signal event. An event is generated when the output signal is set, respectively reset. New signal Same as for the binary inputs (see Section 5.3.7.3. “Bay unit binary inputs”). Central unit signals Most of the CU signals only occur once. There is an output signal “Trip BB zone” for each section of busbar (bus zone), therefore the respective zone must be given when selecting this signal. Delete Same as for the binary inputs (see Section 5.3.7.3. “Bay unit binary inputs”).

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Configuring output relay events An event is generated when an output relay picks up or resets, i.e. this type of event takes any reset delay that has been set or blocking by another signal into account. Select an output relay in the overview dialogue first by clicking on its label above the signal list (its column is then highlighted). Now open the event configuration dialogue by clicking on the “CR event config.” button. As in the case of the binary input signals in Section 5.3.7.2., the binary output signals are configured at the works. 5.3.7.6.

Binary outputs on the bay units The following output signals are listed in ascending order in their respective filter groups.

5.3.7.6.1.

General signals 21105_EXTERNAL TRIP Tripping command generated by the external input 11105_EXTERNAL TRIP. 21110_TRIP Tripping command generated by the station protection intertripping function (BBP, BFP t2 etc.). 21115_REMOTE TRIP Any of the protection functions that are capable of tripping an entire section of busbar (intertripping) can initiate a remote trip signal. Protection functions of this kind are: •

Busbar protection

•

Breaker failure protection

•

End zone protection

•

The command “EXTERNAL TRIP”

Remote tripping can only take place if a fault cannot be cleared by the circuit-breaker in the bay concerned. This applies in the following cases: •

1½ breaker schemes (see Section 11.16.)

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•

Bypass operation with the bus tie breaker being used for a feeder (see Section 11.16.5.)

•

Circuit-breaker bypassed by an isolator (see Section 11.16.5.)

•

Feeder not equipped with its own circuit-breaker.

21120_EXT_TEST_TRIP This signal is used to generate a multi-pole trip for test purposes. It is controlled by the binary input signal 11115_Ext_Test_TRIP. 21305_Trip Signals tripping by the bay unit and can be set by any of the station protection functions. 21405_SP blocked Signals that the station protection functions including “EXTERNAL TRIP” and intertripping are blocked (either the bay concerned or throughout the station). 21410_Output relays blocked All the output contacts configured in the bay unit concerned are blocked. 21805_In service Signal set by the diagnostic function that shows whether or not a bay unit is operational and standing by. 21810_Loss of supply voltage This signals a failure of the isolator auxiliary supply (“Supervision aux. voltage_x”) in the bay unit. 21815_Inspection/maintenance This signal appears when an inspection or maintenance input is set in the bay unit and a position indicator on an isolator or circuit-breaker connected to the bay unit is forced into a particular status. Forcing of an isolator or circuit-breaker in this context means: The item of switchgear changes either from CLOSED to OPEN or from OPEN to CLOSED.

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21820_Alarm Signals an alarm situation in a bay unit. It is set in the following cases:

5.3.7.6.2.

•

An auxiliary supply fault is being signaled.

•

A bay unit diagnostic system has detected an analog signal processing error.

Busbar protection (BBP) 22405_BBP blocked Signals that the busbar protection function is blocked (either individual protection zones or the entire system).

5.3.7.6.3.

Breaker failure protection (BFP) 23105_BFP TRIP Trip generated by the breaker failure protection (after t1). 23110_BFP REMOTE TRIP Tripping command issued to the remote station by the breaker failure protection. This signal can be assigned to an output contact by the signal “REMOTE TRIP”. 23305_BFP trip t1 Signals tripping by the breaker failure protection after time step 1.

23310_BFP trip t2 Signals tripping by the breaker failure protection after time step 2.

23315_BFP TRIP L1 Signals that the breaker failure protection detected a fault on phase L1 and has tripped. 23320_BFP TRIP L2 Signals that the breaker failure protection detected a fault on phase L2 and has tripped. 23325_BFP TRIP L3 Signals that the breaker failure protection detected a fault on phase L3 and has tripped.

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23330_Trip transferred Signals that tripping has been redirected, providing a signal is being applied to the input “13605_Trip transferred”. 23335_Trip by BFP Signals that the breaker failure protection has issued an intertripping command. 23405_BFP blocked Signals that the breaker failure protection is blocked (either the bay or the whole system). 5.3.7.6.4.

End fault protection (EFP) 24105_EFP REMOTE TRIP Tripping command issued by the end fault protection. 24305_EFP trip Signals that the end fault protection has tripped. 24405_EFP blocked Signals that the end fault protection is blocked (either the bay or the whole system).

5.3.7.6.5.

Time-overcurrent protection (OCDT) 25105_OCDT TRIP Tripping command issued by the time-overcurrent function. 25305_OCDT Trip Signals tripping by the time-overcurrent function. 25405_OCDT blocked Signals that the time-overcurrent protection is blocked (either the bay or the whole system).

5.3.7.6.6.

Disturbance recorder (DR) 26805_DR ready Signals that the disturbance recorder is standing by. 26810_DR memory full Signals that the disturbance recorder memory is full.

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26815_DR recording Signals that the disturbance recorder is in the process of recording. 26820_DR record available Signals that disturbance records are available. 5.3.7.6.7.

Circuit-breaker pole discrepancy protection (PDF) 27105_PDF TRIP Tripping command by the circuit-breaker pole discrepancy function. 27305_PDF trip Signals tripping by the circuit-breaker pole discrepancy function. 27405_PDF blocked Signals that the circuit-breaker pole discrepancy function is blocked (either the bay concerned or the entire system).

5.3.7.6.8.

Voltage release (UV) 28805_Voltage criterion Signals that the bay unit is measuring voltage below the setting of the low-voltage criterion.

5.3.7.6.9.

Bay protection (BP) (REB500sys only) 29405_BP blocked Signals that the outputs of the bay protection functions are blocked (either the bay concerned or throughout the system). 29410_BP partial blocked Signals certain bay protection functions are blocked (see 49405_BP blocked). 29600 ParaSet_1 active Signals that parameter set 1 is active. This can take place via the station bus or an input signal.

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29605 ParaSet_2 active Signals that parameter set 2 is active. This can take place via the station bus or an input signal. 29610 ParaSet_3 active Signals that parameter set 3 is active. This can take place via the station bus or an input signal. 29615 ParaSet_4 active Signals that parameter set 4 is active. This can take place via the station bus or an input signal. 29805_BP Test Sequence active Signals that the test sequencer is active (see Section 12.1.4. “Test sequencer”). BP output signals available for configuration In addition to the bay protection output signals listed above which are always available, use can also be made of the signals configured for the binary signal output block of the bay protection. The number of these signals depends on the protection functions and signals included in the bay protection (see Section 12.1. “Application description”). 5.3.7.7.

Central unit binary outputs The following output signals are listed in ascending order in their respective filter groups.

5.3.7.7.1.

General signals 41305_Trip BB zone (busbar designation) Signals which busbar sections have been tripped. An output can be configured for each busbar section, which is then correspondingly designated. There are as many output relays as there are busbar zones and where the number of busbar zones is high, a second BIO module is needed. 41310_Trip transferred Signals that tripping has been redirected by the input “13605_Trip transferred” on a bay unit.

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41390_Bay Unit in service The operational readiness of a bay unit is signaled. This signal can be configured for each bay unit. The signal can also be configured as an event. A relay signal output is not possible. 41405_SP blocked Signals that all the station protection functions including “External TRIP”, “External TRIP BB zone” and intertripping are blocked throughout the system. 41410_Output relays blocked All the output contacts that are configured are blocked. 41505_Isolator alarm This signal indicates that at least one isolator or circuit-breaker is not reporting a defined position (neither CLOSED nor OPEN). It is issued at the end of the set time delay and is reset by the input “Acknowledge isolator alarm”, respectively set again by the next isolator alarm (see Section 3.7.4.). 41805_Alarm This signal is set in the following cases: •

Supply failure

•

Failure or disturbance of a central unit module

•

Failure of the communication with a bay unit

•

Failure of a bay unit

•

Failure of a bay unit function

•

Error when refreshing the data in the protection system

•

Communication error in the central unit

•

“Ext. superv. in service_1/2” inputs not set

41810_In service Signal set by the diagnostic function that shows that the central unit is operational or stand-by.

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41815_Diff. current alarm The differential current of a protection zone exceeded the set alarm level during the preset interval. 41820_Loss of supply voltage Signals the failure of the isolator auxiliary supply on a bay unit (“Supervision aux. voltage_x”). It is used in conjunction with “Not OPEN = CLOSED”. 41825_Inspection/maintenance Signals that an inspection or maintenance input is set on one of the protection units. 41830_Switch inhibit This signal appears together with “Isolator alarm”. No switching of the primary system may take place as long as this signal is active, because the image of the primary system in the protection would not then correspond to the actual situation (see Section 3.7.4.). 41835_Test generator active Signals that the test generator is active, i.e. the test generator is in use somewhere on the busbar protection system. 41415 BB zone blocked The blocking of a bus bar protection or of the inter-tripping of a bus bar section is signalized with this output. This signal is a combined signal of the blocking of a bus bar protection or of the inter-tripping i.e. both the blocking of the bus bar and also the inter-tripping are signaled. 5.3.7.7.2.

Busbar protection (BBP) 42305_BBP trip Signals that the busbar protection has tripped. 42310_BBP trip L0 Signals that a fault was detected on phase L0 and the busbar protection has tripped.

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42315_BBP trip L1 Signals that a fault was detected on phase L1 and the busbar protection has tripped. 42320_BBP trip L2 Signals that a fault was detected on phase L2 and the busbar protection has tripped. 42325_BBP trip L3 Signals that a fault was detected on phase L3 and the busbar protection has tripped. 42405_BBP blocked Signals that the busbar protection is blocked (either individual protection zones or the entire system). 42805_ Check Zone Bypassed Signals that the check zone release function for the bus bar protection is bypassed. 5.3.7.7.3.

Breaker failure protection (BFP) 43305_BFP trip t1 Signals that the breaker failure protection tripped in time step 1. 43310_BFP trip t2 Signals that the breaker failure protection tripped in time step 2. 43405_BFP blocked Signals that the breaker failure protection is blocked (either a bay unit or the entire system).

5.3.7.7.4.

End fault protection (EFP) 44305_EFP trip Signals that the end fault protection has tripped. 44405_EFP blocked Signals that the end fault protection is blocked (either a bay unit or the entire system).

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1^21324567890Time-overcurrent protection (OCDT) 45305_OCDT trip Signals that the time-overcurrent protection has tripped. 45405_OCDT blocked Signals that the time-overcurrent protection is blocked (either a bay unit or the entire system). 45805_OCDT start Signals that one of the feeder time-overcurrent functions has picked up.

5.3.7.7.6.

Circuit-breaker pole discrepancy protection (PDF) 47305_PDF Trip Signals tripping by the circuit-breaker pole discrepancy function. 47405_PDF blocked Signals that the circuit-breaker pole discrepancy function is blocked (either individual bays or the entire system).

5.3.7.7.7.

Voltage release (UV) 48805_Voltage criterion Signals that the voltage release function has been activated (either individual bays or throughout the system).

5.3.7.7.8.

Bay protection (BP) (REB500sys only) 49405_BP blocked Signals that the outputs of the bay protection functions are blocked (either individual bays or throughout the system). 49410_BP partial blocked Signals that certain bay protection output signals in specific bays or throughout the entire system are blocked.

5.3.8.

Configuration / Event text In this window all the event signals configured in the REB500n are displayed. For each event signal a user specific text can be configured (32 characters).

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Fig. 5.20

REB500/REB500sys 1MRB520292-Uen/Rev. E

Event text configuration

The user can sort the list as per ABB reference or the standard text. 5.3.9.

Configuration / Disturbance recorder

5.3.9.1.

Analog inputs The currents measured by the four analog inputs are always recorded. The five voltage inputs may only be recorded providing they have been licensed and engineered (optional). The recording time is doubled if the voltage channels are not activated. The dialogue has three tabs: •

Overview The overview shows all the bay units and their basic disturbance recorder configurations. A bay unit is selected by clicking on it with the mouse.

•

License status This dialogue lists all the licensed bay units and the duration of recording (see Fig. 5.24 “Disturbance recorder - License status”).

•

Configuration The configuration dialogue shows a bay unit together with its recording mode and signals.

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Recording The following disturbance recorder settings can be made (see Fig. 5.21 “Disturbance recorder - Configuration”):

5.3.9.3.

•

Sampling frequency (50 Hz/60 Hz): 600/720 Hz, 1200/1440 Hz or 2400/2880 Hz. The maximum recording time is automatically adjusted to suit.

•

Number of records “n” The maximum recording time available is divided by this setting into “n” equal time periods. For example, assuming 3 records have to be made and a maximum recording time of 6 seconds, 3 records of 2 seconds each can be recorded.

•

Acquisition time This setting determines how much time before the triggering point is included in the record. The total recording time is at least 0.5 s. Of this, at least 0.2 s are pre-event time and therefore at least 0.3 s post-event time.

•

In the event of overflow •

FIX Recording stops. In this mode, the disturbance recorder is stopped as soon as its memory is full. After the records have been uploaded, the disturbance recorder has to be started again manually.

•

FIFO Overwrites the oldest record. In this mode, the oldest record is deleted to make room for new records as soon as the DR memory is full. This means that in this mode the number of records is reduced by one, i.e. for a setting of “n=4” only three DR events can be recorded.

Signals All binary signals (input, output or internal signal) can be recorded. For this purpose, they must be configured for recording and identified by their signal labels.

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Up to 32 binary signals per bay can be selected for recording. Of these, up to 12 can be configured to trigger the start of recording. Triggering can take place on the lagging or leading edge of a signal. If “both edges” is selected, both lagging and leading edges are active (see Fig. 5.22 “Disturbance recorder Configuration - Signals”). Once recording has been started, the complete recording period that has been set is recorded. In addition to the normal bay unit binary signals, there are up to ten general purpose input signals that can be configured for recording and for triggering the disturbance recorder (see Section 5.3.7.3.6., “16705… 16750_Start DR_x”). •

Sorting binary signals The order of the binary signals in the list can be changed by clicking on the “Signal No.” column of the respective signal and moving it to a new position. All other signals are sorted automatically in relation to the signal that has been moved. The order of the signals in the list is the order in which they are transferred when uploading disturbance data.

NOTE: Since circuit-breakers and isolators equipped with two auxiliary contacts (CLOSE and OPEN) can have more than two statuses (open, in motion, closed and undefined), the disturbance recorder does not record their positions. The disturbance recorder and the evaluation software can only process binary signals (i.e. with two possible values). Possible solution: Configure one of the “x.Start DR” signals to be connected in parallel to the CLOSE auxiliary contact on the isolator. Trigger operation Recording commences when at least one of the triggering conditions is fulfilled. The trigger then remains disabled until the record has been completed and is then enabled again. You must therefore set the recording period such that all the signals you want to record can be recorded.

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WARNING: The trigger inputs are scanned every 16 ms. A trigger signal must have a pulse duration of at least 16 ms to be certain that it will be detected.

Fig. 5.21

Disturbance recorder - Configuration

Fig. 5.22

Disturbance recorder - Configuration - Signals

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5.3.10.

REB500/REB500sys 1MRB520292-Uen/Rev. E

Fig. 5.23

Disturbance recorder - Overview

Fig. 5.24

Disturbance recorder - License status

Configuration / HMI LEDs Bay units of the series T500BU03_x are fitted with a local HMI with 20 LEDs the user can configure. Each of them can be assigned to an input or output signal by selecting the menu item “Configuration / Binary module”.

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This opens a dialogue with a list of the bay units with this feature. The respective configuration dialogue is opened by selecting the desired bay unit with the left mouse button and then clicking on “Next” or directly by simply double clicking on the bay unit. The number of the LED on the local HMI is given in the ID column.

Fig. 5.25

LED statuses on the local HMI

Delete signal The assignment of a signal is cancelled by marking it in the dialogue and clicking on “Delete signal”. New signal ... A LED is assigned to a signal by marking it in the dialogue and clicking on “New signal” or alternatively by double clicking on the LED. A list of possible signals is then presented to enable one to be chosen.

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Caption The name in the “Caption” column proposed by the program can be edited by selecting it with the mouse. A caption can have a maximum of 20 characters. Mode The user can determine the response of the LED by clicking in the “Mode” column.

The following modes are possible:

5.3.11.

•

Status: The current status of the signal is displayed.

•

Latching: The status of a LED is stored until one of the following occurs •

A bay protection function picks up

•

A station protection function trips

•

It is reset via the local HMI

•

It is reset by HMI500

•

It is reset by a binary signal

Configuration / CB inspection The “Details” tab lists the plant inspection and maintenance records (see Section 11.12.).

Fig. 5.26 5-50

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ABB Switzerland Ltd

Configuration / GPS time synchronization Provides facility for optimum GPS time synchronization. Refer to Section 11.15. “Synchronization using GPS”.

5.4.

Settings and calculations “Settings” menu This menu accesses the system and protection function parameters and the corresponding setting instructions are given below.

5.4.1.

Rated frequency (not adjustable) The rated frequency of the protection system (50 or 60 Hz) is entered while engineering the system. It is recorded in the report “General plant data” (see Section 4.5.6.2. “Tools / Reports”).

5.4.2.

Settings / System response Details of the differential current supervision and isolator status supervision systems are given in Sections 3.8.4. and 3.7.4. respectively.

5.4.2.1.

System response to a differential current alarm “System response” in the “Settings” menu opens a dialogue that provides a choice of how the system should react to a differential current alarm: •

Continue in operation The busbar protection continues to function.

•

Block busbar protection Operation of the entire busbar protection is blocked.

•

Selective block busbar protection (preferred) Operation of the busbar protection is only blocked for the section of busbar (protection zone) concerned.

Setting the response to “Block” is more likely to cause a failure to trip and to “Continue in operation” a mal-operation. 5.4.2.2.

System response to an isolator alarm The same dialogue also permits the response of the system to be determined in the event of an isolator alarm: •

Continue in operation The busbar protection continues to function.

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•

Block busbar protection and Intertripping Operation of the busbar protection and intertripping scheme is blocked throughout the system.

•

Selective block busbar protection and Intertripping (preferred) The busbar protection and intertripping are only blocked for the section of busbar (protection zone) concerned.

Setting the response to “Block” is more likely to cause a failure to trip and to “Continue in operation” a mal-operation.

Fig. 5.27 5.4.2.3.

Settings - System response

Isolator alarm delay The busbar protection REB500 has a common alarm circuit and timer for monitoring the operation of all the isolators and bus-tie breakers. The setting of the isolator operating time thus applies for all the isolators and circuit-breakers in the system. NOTE: The time delay must be set longer than the slowest isolator operating time.

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5.4.2.4.

ABB Switzerland Ltd

Remote trip impulse width The busbar and where configured, the breaker failure and end fault protection functions can send an intertripping signal to a remote station via PLC or optical fiber communication channel. The duration of the impulse usually has to be limited. Start function

Signal designation

See Section

Intertripping

21115_REMOTE TRIP

5.3.7.6.1.

Breaker failure protection

23110_BFP REMOTE TRIP

5.3.7.6.3.

End zone protection

24105_EFP REMOTE TRIP

5.3.7.6.4.

Table 5.3

Remote tripping signal

The remote tripping signal is transmitted via PLC or an optical fiber link. The impulse width generally has to be limited. Parameter

Min.

Max.

Default

Step

Unit

Remote trip impulse width

100

2000

200

10

ms

Table 5.4

Setting range of the remote trip impulse width

NOTE: The typical duration of the tripping impulse is 200 ms.

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ABB Switzerland Ltd

5.4.3.

REB500/REB500sys 1MRB520292-Uen/Rev. E

Busbar protection (settings and calculations) The following parameters can be set using the HMI: Parameter

Min.

Max.

Default Step

Unit

IKmin Op. char. ‘L1, L2, L3’

500

6000

1000

100

A

k Op. char. ‘L1, L2, L3’

0.7

0.9

0.80

0.05

Differential current alarm Op. char. ‘L1, L2, L3’

5

50

10

5

% IKmin

Delay (Differential current alarm) Op. char. ‘L1, L2, L3’

2

50

5

1

s

IKmin Op. char. ‘L0’

100

6000

300

100

A

k Op. char. ‘L0’

0.7

0.9

0.80

0.05

Differential current alarm Op. char. ‘L0’

5

50

10

5

% IKmin

Delay (Differential current alarm) Op. char. ‘L0’

2

50

10

1

s

Table 5.5

Busbar protection settings

Fig. 5.28

Busbar protection - Operating characteristics

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REB500/REB500sys 1MRB520292-Uen/Rev. E

ABB Switzerland Ltd

The operating characteristic shown in the above dialogue only applies for the restrained current amplitude comparison algorithm. There are no settings for the phase comparison algorithm. 'L1, L2, L3' operating characteristic This dialogue is for entering the parameters applicable to the phase fault operating characteristic. To change a value, click on the arrow button to the right to open a list of possible settings and then click on the desired value. 'L0' operating characteristic The procedure for setting the ground fault characteristic is the same as for phase faults. This dialogue is only available providing a neutral current measurement has been configured (see Section 11.6.). 5.4.3.1.

Restrained amplitude comparison - IKmin and k The ‘restrained amplitude comparison’ algorithm detects an internal fault when the settings for IKmin and k are exceeded. A tripping command is only issued, however, providing the phase comparison function detects an internal fault at the same time. NOTE: The pick-up setting for the fault current (IKmin) must be less (80%) than the lowest fault current that can occur on the busbars (IKMS). There is a risk of the protection being too insensitive at higher settings. Providing the minimum fault current (IKMS) is high enough, IKmin should be set higher than the maximum load current. If the CT’s saturate at the minimum fault current, the feeder currents have to be reduced by an empirically determined factor CR. The corrected current values form the basis for calculating the setting for IKmin. The reduction factor CR is calculated as follows: For a power system time constant TN ≤120 ms: CR = 0.45 + 0.55 ⋅ e

−

IK 0.3 ⋅IN ⋅n'

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REB500/REB500sys 1MRB520292-Uen/Rev. E

For a power system time constant 120 ms