Technical Specification For 11kV, 20kV and 33kV Pole Mounted Auto-Reclose Circuit Breakers NPS001 - 009

 

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NPS/001/009 – Technical Specification for 11kV, 20kV and 33kV Pole Mounted Auto-reclose Circuit Breakers. 1.

Purpose The purpose of this document is to detail the requirements for 11kV, 20kV and 33kV pole mounted auto-reclose circuit breakers (PMAR) for use on the overhead line distribution networks of Northern Powergrid. This document supersedes the following documents, all copies of which should be destroyed.

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NPS/001/009

Ver. 2 Feb 2008

NPS/001/009 – Technical Specification For 11kV, 20kV And 33kV Pole Mounted Auto-Reclose Circuit Breakers

Scope This document details the design and operational requirements for 11kV, 20kV and 33kV PMAR’s P MAR’s including the control cabinet and all the associated equipment located within. New PMAR’s are required to integrate into an extensive existing overhead line automation system, as such this specification also includes detailed information relating to the t he communication and control requirements.

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Contents

Purpose Purpose........................... ........................................... ................................ ................................ ............................... ............................... ................................ .......................... .......... 1 Scope.............................. .............................................. ................................ ................................. ............................... .............................. ................................ .......................... .......... 1

Contents Contents ............................ ............................................ ................................ .............................. .............................. ................................ ............................... ..................... ...... 3 2 3. 2.1 Technical Requirements .................... .......... .................... ................... ................... ..................... .................... .................. .................... .................... .................. ......... 3.1 Environmental Conditions ................... ......... .................... ................... .................... ...................... ..................... ................... .................... ...................... ........... 3 3.2 Ratings Ratings ............... .............................. ............................... ................................ .............................. .............................. ................................ ............................... ..................... ...... 3 3.3 PMAR and Mounting Requirements ...................... ........... ..................... ................... ................... .................... ................... .................... ................ ..... 4 3.4 Anti-Corrosion requirements .................... .......... ................... ................... ..................... .................... .................. .................... .................... .................. ......... 6 3.5 Control Cabinet Requirements................... ........ ...................... ..................... ................... ................... .................... ................... .................... ................ ..... 6 3.6 Communication Systems ................... .......... .................. .................... ..................... ................... .................... ...................... ..................... ................... ............. .... 8 3.7 Cabinet and Circuit Breaker Connection .................... .......... ................... ................... ..................... .................... .................. .................... ........... 9 3.8 Circuit Breaker Operational Operational and Control Requirements..................... ........... ................... ................... .................... ................. ....... 9 3.9 Protection Relay Characteristics ..................... .......... .................... .................. .................... .................... ................... ..................... ...................... ........... 9 3.10 Input/Output Expander Card .................... .......... ................... ................... ..................... .................... ................... .................... ................... ................ ....... 11 3.11 Type and Routine Tests ................... .......... .................. .................... ..................... ................... .................... ...................... ..................... ................... ........... .. 11 4. References References............................ ............................................ ................................ .............................. .............................. ................................ ............................... ................... .... 12 5. Definitions Definitions ................................ ................................................ ............................... ............................... ................................ .............................. .............................. .................. 13 6. Authority for issue........ ................... ..................... ................... ................... .................... ................... ................... ..................... .................... .................. .................. ......... 14 Appendix 1 – Schedule of Requirements .......................................................................................... 15 **Logistically Northern Powergrid has a preference to receive units capable of dual voltage operation at both 11 and 20kV, but this does not preclude the offer of units ffor or single voltage operation. Appendix 2 – Schedule of Technical Parameters .............................................................................. 15 Appendix Appe ndix 2b .............................. .............................................. .............................. .............................. ................................ .............................. .............................. ............................ ............ 18 Appendix 3 – Logistical Requirements .............................................................................................. 20 Appendix 4 - Self Certification Conformance Declaration Declaration ..................... .......... .................... ................... .................... ................... ................ ....... 21 Appendix 5 - Pre-commission testing, Routine Inspection and Maintenance requirements ............... ........... .... 28 Appendix 6 - Technical Information Check List ................................................................................. 29

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Technical Requirements PMAR circuit breakers shall be designed and tested in accordance with ENA TS 41-36, ANSI Standard S tandard C37.60 and the additional clauses or requirements located within this specification.

3.1

Environmental Environmental Conditions The PMAR’s shall be capable of operation within the following service conditions:

a) Ambient temperature tempera ture range of -25°C to +40°C wher e the average value of the ambient air temperat temperature, ure, measured over a period per iod of 24h, doe does s not exceed 35°C . b) Wind pressu pressure re not exce exceeding eding 730 Pa (corresponding to 33 m/s wind speed speed). ). c) Maximum installation altitude not exceeding 1000m. Account shall be taken of any detrimental effects resulting from condensation and/or precipitation.

3.2 Ratings 3.2.1 Rated Voltage (Ur) The equipment shall be rated for use at 12kV, 24kV or 36kV as defined in the Range 1, Series S eries 1 sub clause 4.1.1 of BS EN 62271-1:2008+A1:2011. 3.2.2

Rated Insulation Level (Up)

Rated Voltage Ur  kV(rms. value)

12 24 36

Rated short-duration power frequency withstand voltage Ud kV (rms. value) for 1 minute Common Across the Value isolating distance Dry Wet Dry Wet 50 45 55 50 70 60 77 66 95 80 105 88

Rated lightning impulse withstand voltage Up kV (peak) Common Value

Across the isolating distance

110 125 (**150 ) 200

125 145 (**165) 220

** The preferred impulse insulation withstand voltage shall be as detailed in Table 1b of BS EN 622711:2008+A1:2011,, however the reduced value detailed in Table 1.1a of ENA TS 41-36 will be 1:2008+A1:2011 acceptable for 20kV units. 3.2.3

Provision for Dielectric Tests on Cables

The additional Power Frequency Withstand Voltage Type Tests as detailed in ENATS 41-36 clause 1.4.2.2 are not required as Northern Powergrid do not accept PMAR’s as a point of isolation for work or cable testing purposes. 3.2.4 Current Ratings Voltage Normal Current

Rated short-time withstand current (kA)

12kV 24kV

630 A

12.5kA

36kV

800 A

16 kA

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3.2.5 Values of Rated Line-charging Breaking Currents and Rated Cable-charging Breaking Currents Rated Voltage kV 12kV 24kV 36kV 3.2.6

Breaking Current KA Rated Cable Charging 10 16 20

Rated Line Charging 1 1.5 2

Rated Frequency

The rated frequency shall be 50Hz. 3.2.7

System Earthing

The PMAR’s are required for use on a system that has its neutral directly earthed, resistance earthed or earthed via an arc suppression coil. The equipment shall be suitable for use on three phase, 50hz, 11kV, 20 or 33kV electrical distribution networks in which point is earthed either directly withresistor t ypicalinmaximum levels of 2000A forthe 1.5neutral seconds or by means of a neutral earth which theearth earthfault f aultpassage fault passage levels have been limited to 1200A for 1.5 seconds. On certain parts of the distribution system, the above earthing methods have been replaced by or supplemented with arc suppression coils. The arc suppression coils have been installed to manage earth faults that are transient in nature. The protection system has been designed in such a way that the coil remains in circuit for a specific period of time limiting the flow of fault current. This action negates the requirement for an immediate circuit breaker operation and thus allows the system to operate normally for transient faults. If the fault is sustained, the protection system reverts back to the more traditional resistance earthed protection environment detailed above.

3.3

PMAR and Mounting Mountin g Requirements 3.3.1 Mounting Arrangements PMAR’s shall be designed to be mounted onto single wood poles utilising lightweight, compact pole mounting frames that shall be supplied with each PMAR. The mounting frames shall be designed to be secured to the pole utilising two M20 pole bolts vertically spaced with 360mm centres. The fixings within the mounting frame shall be designed with a M22 hole for the top fixing and an M22 keyhole slot for the bottom fixing. The preferred mounting arrangement will result in the PMAR being located vertically below the overhead conductors. PMAR units shall be supplied complete with manufactures data plates indicating tthe he serial number and key technical parameters, including the weight of the PMAR. 3.3.2

PMAR status indication

All PMAR’s shall be supplied with a means of providing the current status of the equipment without the requirement to interrogate the control relay. In the open state the label or indicator shall be green In the closed state the label or indicator shall be red

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Insulator Bushings

Insulator bushings shall be manufactured from light weight durable materials that are UV stable and comply with the rated insulation levels detailed in clause 3.2.2. 3.3.4

HV Connections

On the 11 & 20kV units, the PMAR shall be supplied equipped with 400A mechanical parallel groove type connectors or double holed lugs to allow the connection of insulated jumpers to the HV terminals of the circuit breaker. The clamps shall be designed to allow the connection of flexible copper insulated 2  jumpers of minimum cross section 70mm 70mm . All connections shall be shrouded to protect against interference from birds or small animals. On the 33kV units the PMAR shall be supplied equipped with 800A connectors and designed to allow 2 the connection of flexible copper insulated jumpers of minimum cross section 120mm . 3.3.5

Local Mechanical Trip Facility

Facilities shall be provided to allow the circuit breaker to be tripped manually without the need for external power supplies. This shall normally be provided through the use of a yellow pull ring mounted on the exterior of the circuit breaker. The trip ring shall be designed to be operated from ground level with the use of standard insulated operating rods. Once the manual trip has been operated, it shall not be possible to close the circuit breaker either locally or remotely by electrical means without the trip lever being manually reset. 3.3.6

Earth Connection

The PMAR mounting bracket shall incorporate a 22mm hole to allow the bracket to be bonded to the pole earthing system. 3.3.7 Erection Facilities The PMAR’s shall be supplied with suitably rated lifting lift ing eyes, positioned to facilitate the lifting of the equipment in the correct orientation without the lifting straps transmitting any forces onto with the bushings during the lifting operation. Where W here this cannot be accommodated using standard slings, the PMAR suppliers shall provide Northern Powergrid with lifting frames for this purpose. All PMAR’s shall be marked to indicate the weight of the circuit breaker and the control cabinet and shall have a diagram of the lifting and slinging arrangement to facilitate the correct lifting methodology on site. 3.3.8

Arc Interruption Medium

HV switch arcs shall be interrupted using vacuum bottle technology. 3.3.9 Stored Energy The circuit breaker shall not be allowed to close unless there is sufficient stored charge available to allow the circuit breaker to be electrically tripped.

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Anti-Corrosion Anti-Corrosio n requirements Ferrous surfaces shall be protected against corrosion by galvanisation or Zink spray coating. Surfaces shall be prepared in accordance with ENA TS 98-1. 3.4.1

Zink Spray

The zinc shall be applied to a thickness of Zn4 in accordance with BS EN E N ISO 2063. 3.4.2

Galvanising

Galvanising shall be applied by the hot dip process in accordance with BS EN ISO 1461 to achieve a minimum thickness of 85 µm and an expected expected min./max. durability figure of 40/>100 for C3 or 20/40 for C4 corrosivity categories as detailed in BS EN14713-1. Oversize tapping or re-tapping of female threads shall be provided where the bolt or male thread is hot dip galvanised. Nuts shall be tapped up to 0.4mm oversize after galvanising and the threads shall be oiled. Bolts and screwed rods shall be galvanised after thread forming.

3.5

Control Cabinet Requirements Requirements 3.5.1

Design of control cabinet

The control cabinet shall be large enough to incorporate the following equipment within the Cabinet: Control Relay Communications RTU, Battery charger and batteries, Heater and thermostatic control unit, Radio communications tray to allow a radio or modem unit to be installed. The control cabinet and doors shall be fabricated from stainless steel. The cabinet shall be designed to meet the "degrees of protection" and “Enhanced Security” requirements as detailed in clause 3.5.2 and 3.5.3 of this specification. The control cabinet shall incorporate a 12mm stud mounted externally in the base to allow a minimum of 2 earth connections to be made to the cabinet. The control cabinet shall allow external power supplies and communications aerials to be terminated into the base of the cabinet. To achieve this requirement the control cabinet shall be supplied with a bulkhead type TNC-TNC antenna fitting (installed in a M16 hole) with female f emale sockets on each side. Additionally it shall incorporate an M22 hole to allow the LV supplies to be terminated onto an M20 cable gland (CW20S). The control cabinet shall be designed to be mounted onto a wood pole and be supplied with all brackets and fixings required. Under normal circumstances the control cabinet is required to be mounted on the pole with the main display at average eye line height. As such it shall be provided with an umbilical communication cord as detailed in clause 3.7 3.5.2

Degree of protection by the control cabinet

Protection Against Access - The degree of protection (IEC 60529) of persons provided by the enclosure against access to hazardous parts and protection of the t he equipment against ingress of solid foreign objects shall not be less than IP3XD.

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Protection Against Ingress of Moisture - The degree of protection for pole-mounted enclosed equipment shall be not less than IP34 in accordance with IEC 60529. The weatherproofing test method shall be the method given in annex C of IEC 60694. 3.5.3

Enhanced Security – To protect against unauthorised Interference

Cabinets shall be designed to reduce the likelihood of interference with the equipment located within the cabinet. Typical methods of achieving this requirement shall include, but not be limited to the following methods:Multi-point locking system Reinforced cabinet doors

3.5.4

Cabinets shall be tested in accordance with the LPS 1175 (Loss Prevention Standard) so that they achieve a minimum security rating classification of 2 (with options for class 3), tool t ool category C. Manufactures shall provide details of their proposals to satisfy this clause and any testing they have carried out to verify the effectiveness of the design. Batteries and Chargers Control cabinets shall include battery charger units unit s and secondary batteries. The batteries shall be low loss rechargeable 12V batteries that have a minimum operational lifetime of 10 years in an environment that complies with clause 3.1 Typically the charging units will be supplied from externally mounted auxiliary Voltage transformer (system voltage /230V), although they may also be supplied from local 400/230V 50Hz supply networks. All charging units shall incorporate battery condition and test software. Manufactures shall provide details of the quiescent drain drai n placed on the batteries when w hen the LV auxiliary supplies are not available. In the event of a failure of the t he external supply voltage or of the battery charger or battery, a means shall be provided to generate an alarm that registers both locally on the controller display located in the control cabinet and remotely as a SCADA output indicating the failure condition. The control cabinets shall incorporate a double pole isolator in the LV power supply circuit. The cabinet shall have the facility to isolate potential LV supplies from a single location within the cabinet. Disconnection of batteries for maintenance or replacement purposes, or in i n the event of battery/charger/supply failure causing the batteries to discharge, shall not cause a loss of stored data within the Relay or RTU unit The control cabinets shall be supplied with a (2 wire) 12V power lead suitable for supplying power to the radio. The length of this wire shall be sufficient in length to reach the rear of the radio units and be fitted with a 10A in line fuse. The free end of the power lead shall be terminated into a connector block. All battery terminals shall be provided with insulating shrouds to prevent inadvertent short circuiting of the terminals. 3.5.5

Heaters

The control cabinets shall be supplied complete with thermostatically controlled heaters designed to work solely from an external 240V power supply. In the event of loss of external power supplies, they shall not impact on the standby capacity of the batteries.  batteries. 

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Electromagnetic Compatibility

The equipment (including control and communication systems) shall comply with wit h EMC Directive 89/336/EEC, IEC60694 and BS EN 62271. 3.5.7

Operational Safety and Locking

The control cabinet and relay unit shall be designed to allow a field operative to select and secure the equipment in an open or closed status. Once in this designated status, it shall not be possible to change the status of the equipment by b y remote control means. The control cabinet door(s) shall be suitable for application of a padlock with a 7mm diameter shackle. 3.5.8

Computer Port

The electronic controller shall be supplied with a 25 way female D-type connector providing RS232 communication to the electronic controller. 3.5.9

Programming Software

Software shall be provided to control or programme the units via the computer port in clause 3.6.5 3.5.10 Internal Power Socket A electrical socket outlet designed for operation at 240V shall be provided within the control cabinet. The socket shall be protected with a suitable MCB to limit li mit the maximum current available to less than 500mA. (Suitable for powering typical laptop power supplies only) 3.5.11 Remote Operation of the Control Relay The control relay must incorporate an integral RTU (Remote Terminal Unit). The RTU shall provide via a suitable communications system, a remote control and indication facility. Appendix B provides details of the DNP3 point assignments required by the RTU to integrate into the existing Northern Powergrid SCADA control system.

3.6 Communication Communication Systems 3.6.1 Radio Systems Northern Powergrid utilises two distinct types of radio system to communicate and control the PMAR’s, these consist of the Radius Low Power, multi-hopping multi-hopping radio system used in the Northern Powe Powergrid rgrid (Northeast) Area and the Key Radio’s (MPT 1327) radio system used in the Northern Powergrid (Yorkshire) PLC area. 3.6.2 Message size (Conflict with Radius radio system) The radius low power radio system has a limit on the message size of 240 bytes, previous work has confirmed that it is necessary to constrain this message size to a figure of less than 240 bytes, preferably 200 bytes, to avoid the risk of the Radius radios locking up (which can only be resolved by powering down the radios on site and deleting the message from the RTU’s). This issue does not occur with the key Radio system as it uses the RTS/CTS commands.

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Power Management

The RTU unit shall incorporate a radio power management system. If the auxiliary power supply fails, the unit shall monitor the time of the failure f ailure and after a user settable time (timers shall be programmable up to 12 hours and by default the timers shall be set at 4 hours) shall disable the power supply to the radio. When the auxiliary power supply becomes available again, the RTU shall re-enable the power supply to the radio. The batteries shall have sufficient capacity to provide an estimated 2.5 days backup time with the Key radio system attached and 3.5 days with the Radius radio system.

3.7

Cabinet and Circuit Breaker Connection Connectio n The circuit breaker shall be connected to the control cabinet by an umbilical cable. The cable shall be provided in a standard 7m length. An option for an 11m version shall be available. The cable shall connect the recloser to the cabinet and be designed so as to short out the recloser CTs when the umbilical cable is unplugged.

3.8

Circuit Breaker Operational and Control Requirements Requirements The following control functions shall be provided both locally and remotely through the SCADA system. At the local control panel the control functions will be provided p rovided by separate open and close switches, and separate protection control switches for each function. f unction. The following protection modes shall be accommodated using the control relays programmable logic and standard soft keys:  

Normal Automatic Sequence Mode (Auto recloser on)

 

Live Line Mode (Auto rec recloser loser disabled – Instantaneous Trip & Lockout only) o  This function shall be enabled us using ing the “Hot Line Tag” front panel soft soft key which will be relabelled as “Live “Live Line”. Line”.

 

Non Au Auto to Mode – (Fault Hunting - Auto reclose and Instan Instantaneous taneous protection o off) ff) turns off reclosing and goes to alternate protection group with w ith a delayed curve. As described this mode allows only 1 delayed trip before lockout. This mode will select an alternative protection characteristic/curve using the “Reclose “Reclose Blocked” (disables Blocked” (disables the reclose function) followed by the selection of the Alt 1 programming group key which will be re-labelled “Non “ Non Auto Selected”” Selected Solid Mode (All Protection off) – In switch switch mode mode all protection is o off ff but an alarm is configurable that will signal the passage of fault current via telecontrol. o  To provide this func functionality tionality the Prog 2 key sh shall all be configured and re-labelled re-labelled “Protection Disabled”. Disabled”. When using this soft key a message “switch mode appears on the PCD LCD display when initially activated for 3 seconds.

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•

•

 

•

 

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SEF toggle ( SEF In-Out)  

•

 

Open – Recloser is opened via the front p panel anel Red Open Open button.  button.

 

Closed – Recloser is closed via the front panel  panel Black Close Close button.  button.

• •

3.9

The PCD shall be configured so that SEF In/Out c can an be selected via a re-labelled Prog 1 button. This will be such that when the “SEF “ SEF Disabled” Disabled” soft key is selected (LED illuminated) the SEF is disabled.

Protection Relay Characteristics Characterist ics

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The relay shall meet the functional and environmental requirements detailed in ENA TS 48-5 "Electrical Relays" and any additional tests which may ma y be deemed necessary due to the closing c losing mechanism and the proximity of the recloser. The relay shall provide the following protection functions: 2 pole Instantaneous Overcurrent (OC) and single pole Instantaneous Earth Fault. 2 pole Delayed Overcurrent (OC) and single pole Delayed Earth Fault with the following choice of characteristics: i) ii) iii) iv) v)

Standard Inverse Very Inverse Extremely Inverse American National Standard Institute (ANSI) Definite Time Lag

Definite Time Lag Sensitive Earth Fault (SEF) - selected separately from (v) above. The protection shall remain stable under magnetising inrush i nrush and transient harmonic situations. The protection relay and RTU shall not lose or suffer corruption to any settings; in protection, control logic or communications in the event of a loss of power to the relay. 3.9.1

Protection – Functional Requirements The PMAR shall be equipped as follows:                      

•

•

• • • • • • • • •

 

•

trips to lockout with any combination of tripping characteristics OC/EF and SEF s sequences equences to be independent of each other. Selectable Sequence Co-ordination. Individually adjustable Dead Times Adjustable reclaim times Line check function Sequence co-ordination. Cold Load Pickup Broken conductor protection Directional Blocking Voltage Measurement on the incoming termin terminals als with provision for an external CT for measurement of voltage on the load terminals. Power Measurement

Additionally the control unit shall allow the circuit breaker to operate like a sectionaliser. It shall provide accurate fault passage information via its CTs to the RTU whilst remaining in it's i t's closed state. It shall only change status as a result of a pre-programmed set of events or via remote operation. operation. –  – See Solid Mode listed in clause 3.9 3.9.2

Range of Protection Settings

Current Setting Ranges: Overcurrent – 50 to 600 Amps Earth Fault – 10 to 200 Amps Sensitive Earth Fault – 4 to 30 Amps Instantaneous OC and EF with settings as the Overcurrent and Earth Fault Current detailed above.

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Timing Range Settings: Overcurrent Time Multiplier - 0.1-1.0 TM   Overcurrent and Earth Fault Time Delay - 0.5 to 3.0 seconds Instantaneous Time Delay - 0 to 2.0 seconds  Sensitive Earth Fault Time Delay - 0 to 20 seconds  Dead Time - 1 to 60 seconds Reclaim Time - 5 to 60 seconds Sequence co-ordination time - 0 to 1 seconds 3.9.3

Indications Required Locally and Remote

Local Indication: Number of recloser operations completed since installation. Fault current magnitudes and duration, for each phase, for at least the last 25 recloser operations Present load current. Maximum demand with in the past 12 months plus Instantaneous/half hour average demand. Contact wear on all three phases. Battery condition. Loss of supply Remote Indication: Indication of status, OPEN or CLOSED. Indication of current (three digits for current and five digits for voltage). Operation OPEN or CLOSE. Protection settings. Battery condition. Loss of supply Select individual protection feature e.g. SEF. 3.9.4

Battery Alarm Condition

During site installation, users are required to carry out a number of tests to prove full communication to our SCADA system. A minimum test function required on all systems shall be the provision of a battery fail alarm. This alarm condition functionality shall be provided either from a function key on the control panel or by the opening of the battery MCB

3.10

Input/Output Expander Card Provision shall be made for an optional INPUT/OUPUT expander card to provide optically isolated input contacts and voltage free output contacts. This may be required with externally provided RTU units or as a conversion medium between non-compliant DMP3 (detailed in Section 3.2.8 Table) communication equipment.

3.11

Type and Routine Tests The equipment shall be subjected to the tests detailed in ENA TS 41-36, ENA TS 48-5 and applicable BS EN and IEC documents detailed in this document. Appendix A (Self Certification Certif ication Conformance Declaration) details the appropriate clauses and sub-clauses of the t he relevant standards.

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4.

References

4.1

External Documentation Documentati on

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The products described within this specification shall comply with the latest versions of the relevant International Standards, British Standard Specifications and all relevant Energy Networks Association Technical Specifications (ENATS) current at the time of supply Reference

Title

ANSI Standard C37.60

Standard Requirements for Overhead, Pad Mounted, Dry Vault, and Submersible Automatic Circuit Reclosers and Fault Interrupters for Alternating Current Systems up to 38 kV

BS EN 62271-1:2008+A1:2011 62271-1:2008+A1:2011 ENA TS 41-36 BS EN 62271-100

alternating-current circuit-breakers High-voltage switchgear and control gear. AC metalenclosed switchgear and control gear for rated voltages above 1 kV and up to and including 52 kV High-voltage switchgear and control gear. High-voltage alternating current disconnectors and earthing switches Specification for degrees of protection provided by enclosures (IP code) Technical Specification for Protection Approval Panel Technical Specification for the Surface Preparation of New Plant Thermal spraying. Metallic and other inorganic coatings. Zinc, aluminium and their alloys Hot dip galvanized coatings on fabricated iron and steel articles. Specifications and test methods Zinc coatings —Guidelines and recommendations for

BS EN 62271-200

BS EN 62271-102 IEC 60529 ENA TS 48-5 ENA TS 98-1 BS EN ISO 2063 BS EN ISO 1461 BS EN14713-1

the protection against corrosion of iron and steel in structures (General principles of design and corrosion) Requirements and testing procedures for the LPCB approval and listing of intruder resistant building components, strong points, security enclosures and freestanding barriers.

LPS 1175

4.2

Internal documentation Reference

4.3

Common Specification for HV Switchgear and Control Standard Technical Specification for Distribution Switchgear for Service up to 36kV (cable and overhead connected) High-voltage switchgear and control gear. High-voltage

Title

Summary of Amendments Clause Scope

Amendment’s Extended scope to encompass the requirements for the PMAR

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to fit into the existing SCADA network Table of contents added Environmental operating conditions stated Further information on system earthing conditions added

2.1 3.1 3.2.9 3.3 3.3.2 3.3.3 3.3.4 3.3.7 3.5 3.6 3.8 3.9 4.3 Appendix 1 Appendix 2

5.

 

Appendix 3 Appendix 4 Appendix 5

PMAR mounting arrangements defined PMAR status condition indication defined Information on HV connection requirements added Information on Local mechanical trip requirements added Acceptable Arc interruption medium changed Control cabinet requirements extended Control cabinet requirements extended CB operational and control requirements extended Protection relay requirements extended Summary of changes section added Schedule of requirements section added Schedule of technical requirements added including DNP3 maps Logistical requirements added Self certs updated Pre-commissioning testing, routine inspection and

Appendix 6

maintenance requirements Technical Information Check List

Definitions Term PMAR DNP3

SCADA OC/EF SEF RTU Hot dip Galvanizing

Definition Pole Mounted Auto Recloser (Distributed Network Protocol) is a set of communications protocols used between components in process automation systems Supervisory control and data acquisition   Overcurrent / Earth Fault Sensitive Earth Fault Remote Terminating Unit Formation of a coating of zinc and/or zinc iron alloys on iron and steel products by dipping prepared steel or cast iron in a zinc melt

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Authority for issue Author I sign to confirm that I have completed and checked this document and I am satisfied with its it s content and submit it for approval and authorisation. Sign G Hammel

6.2

Date

Overhead Standards Engineer

Technical Assurance I sign to confirm that I am satisfied sati sfied with all aspects of the content and preparation of this document and submit it for approval and authorisation. Sign S Salkeld

6.3

Date

Standards Engineer

DBD Assurance I sign to confirm that this document has been assured for issue on to the DBD system

R McHaddan

6.4

Sign

Date

Sign

Date

Sign

Date

DBD Administrator

Approval Approval is given for the content of this document

Standards and Assessments Manager

C Holdsworth

6.5

Authorisation Authorisation is granted for publication of this document

M Nicholson

Head of System Strategy

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Appendix 1 – Schedule of Requirements Item Commodity Commodity Code

Description

1 2

11/20kV 630A 12.5kA PMAR 33kV 800A 16kA PMAR

216123 ** 216130

**Logistically Northern Powergrid has a preference to receive units capable of dual voltage operation at both 11 and 20kV, but this does not preclude the offer of units for single voltage operation.

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Appendix 2 – Schedule of Technical Parameters The Technical parameters have been specified within the main body of this specification

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Appendix 2a DNP 3 Point Assignment DNP

CONTROLS

Point No 0 0 1 1

Tag N1_DO_00 N1_DO_01 N1_DO_02 N1_DO_03

2

N1_DO_04

2

N1_DO_05

Description Open Closed Prot OFF (Switch Mode) Prot ON (Switch Mode) EF Prot Off (Ground Block) EF Prot On (Ground Unblock)

3 3 4 4 6 6

N1_DO_06 N1_DO_07 N1_DO_08 N1_DO_09 N1_DO_DCB O N1_DO_DCB C

SEF Off (Block) SEF On (Unblocked) A/R Off (Block) A/R ON (Unblocked) DCB Open (UL01 Off) DCB Closed (UL01 On)

Channel 0 1 2 3

Type Direct Operate Direct Operate Direct Operate Direct Operate

Count 1 1 1 1

OnTime 2000 2000 2000 2000

OffTime 500 500 500 50 500 0

Queue No No No No

Clear No No No No

Xcell_Drives_as Xc ell_Drives_as Three Stage Three Stage Three Stage Three Stage

Mode Pulse Pulse Latch Latch

Fill_Trip Inverted  _close On Trip On Close Null  Off Null  On

4

Direct Operate

1

2000

500

No

No

Three Stage

Latch

Off

Null

5

Direct Operate

1

2000

500

No

No

Three Stage

Latch

On

Null

6 7 8 9 11 12

Direct Operate Direct Operate Direct Operate Direct Operate Direct Operate Direct Operate

1 1 1 1 1 1

2000 2000 2000 2000 2000 2000

500 500 500 500 500 500

No No No No No No

No No No No No No

Three Stage Three Stage Three Stage Three Stage Three Stage Three Stage

Latch Latch Latch Latch Latch Latch

Off On Off On Off On

  Null Null  Null  Null Null Null

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Appendix 2b DNP

CONTROLS

Point No

Tag

TBC

N1_DO_S1 O

TBC

N1_DO_S1 C

TBC

N1_DO_S2 O

TBC 50 Via Radius

Description SP 1 Open (UL02 off)

Channel

Type

Count

OnTime

OffTime

Queue

Clear

Xcell_Drives_as Xcell_Drives_as

Mode

Fill_Trip Inverted  _close

13

Direct Operate

1

2000

500

No

No

Three Stage

Latch

Off

Null

14

Direct Operate

1

2000

500

No

No

Three Stage

Latch

On

Null

15

Direct Operate

1

2000

500

No

No

Three Stage

Latch

Off

Null

N1_DO_S2 C

SP 1 Closed (UL02 on) SP 2 Open (UL03 On) SP 2 Closed (UL03 off)

16

Direct Operate

1

2000

500

No

No

Three Stage

Latch

On

Null

DO_50

Update OSTN

10

Direct Operate

1

2000

500

No

No

Three Stage

Pulse

On

Close

Required by

Key

(Northeast)

Overall availability to Match (Yorkshire)

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Appendix 2 C

1

ABB Point Value 0

0

1

0

0

1

EF PROT DISABLED

1 Not Used

N1_DI_2

EF PROT ENABLED

Not Used

3

N1_DI_3

SEF PROT DISABLED

3

N1_DI_3

SEF PROT ENABLED

4 4

N1_DI_4 N1_DI_4

AUTO RECLOSE OFF AUTO RECLOSE ON

5

N1_DI_5

DCB OPEN - Alarm 81

5

N1_DI_5

DCB CLOSED - Alarm 81

6

N1_DI_6

OVER CURRENT TRIP

7

N1_DI_7

EF TRIP

8

N1_DI_8

SEF TRIP

9

N1_DI_9

LOCKOUT OPERATED

9

N1_DI_9

LOCKOUT CLEAR

10

N1_DI_10

LOCAL

10

N1_DI_10

REMOTE

11

N1_DI_11

AUX SUPPLY OFF

11

N1_DI_11

AUX SUPPLY ON

12

N1_DI_12

SWITCH GR FUNCTION OFF

12

N1_DI_12

SWITCH GR FUNCTION ON

DI_50

COMMS FAIL

DNP Point No

Nulec

DIGITAL INPUTS

0

N1_DI_0

OPEN

0

N1_DI_0

CLOSED

1 1

N1_DI_1 N1_DI_1

PROTECTION OFF - Alarm 82 PROTECTION ON - Alarm 82

2

N1_DI_2

2

0

1

1

0

0 1 0

1 0 Not Known

1

Not Known Not Used

50 Via Radius

Not Used Not Used 1

1

0

0

0

1

1

0

0

0

1

1

0

Not Known

1

Not Known

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51 Via Radius

DI_51

DEVICE RESTART

65 Via Radius

DI_65

DIGMAP INPUT

66 Via Radius TBC

DI_66 X+1

DIGMAP INPUT Spare

TBC

X+2

Spare

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Appendix 3 – Logistical Requirements 1.0

Protection and Packaging The equipment shall be suitably packaged and protected with each unit marked with the following information:

2.0

(i)

Manufacturers name.

(ii)

Manufacturers product type and unique unit serial number.

(iii)

Description of item.

(iv)

Date of supply.

(v)

Company order number.

(vi)

Purchasing Companies Stock Catalogue Number.

(vii)

Weight of each unit.

Test Certificates

All circuit breakers shall be supplied complete with a copy of the routine tests carried out on the t he equipment during its manufacture. The test cards shall be enclosed in a waterproof document holder and be tied to the recloser.

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Appendix 4 - Self Certification Conformance Declaration Pole Mounted Auto-reclose Circuit Breakers shall comply with the latest issues of the relevant ENA technical specifications, international and British Standards. This check sheet identifies the clauses in the aforementioned Standards relevant to Pole Mounted Auto-recloser Circuit Breakers for use on the NEDL and YEDL distribution networks. The manufacturer shall declare conformance or otherwise, clause by clause, using the following levels of conformance declaration codes. Conformance declaration codes N/A = Clause is not applicable/ appropriate to the product Cs1 = The product conforms fully with the requirements of this clause Cs2 = The product conforms partially with the requirements of this clause Cs3 = The product does not conform to the requirements of this clause Cs4 = The product does not currently conform to the requirements of this clause, but the manufacturer proposes to modify and test the product in order to conform.

Instructions for completion • When Cs1 code is entered no remark is necessary • When any other code is entered the reason for nonconformance shall be entered • Prefix each remark with the relevant IEC, ‘BS EN’ or ‘ENATS’ as appropriate 

Manufacturer: Product Reference:

Name:

Signature:

Date:

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Type Testing Standard

Clause/Sub

Requirement

Conformance

Remarks

29