TUTORIAL 7 Specifying Relay Testing Requirements

Specifying relay testing requirements

Uttam Mishra

Doble Engineering Company

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Outline ©Do • • • • • • •

Philosophy of testing What Features should good test equipment have? What offering Doble has to meet this requirement? Competitive Offerings What makes the Doble offering the best? Conclusions Q/A

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Testing Philosophy

• “You can't do today's job with yesterday’s methods and be in business tomorrow”

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Evolution of Testing ©Do • •

• • •

Electromechanical & Static Relay Testing Techniques – Steady state test – Dynamic on/off test For EMS technologies, the testing philosophy was based upon proving the integrity of the relay’s operating characteristic and operating time for each fault type against the manufacturer’s specification. This philosophy was verified or updated according to results from acceptance testing / commissioning or in-service failures. Electromechanical relays operated based on mechanics and magnetism so require much power for testing. It also require high compliance voltage for testing due to resistance of coil

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Evolution of Testing • Numerical Relays and PMU testing – Dynamic testing – Transient testing – End to end testing – Wide Area Measurements • Numerical relays are multifunctional. when testing a microprocessor relay element with conventional technique, different elements inside the relay often overlapped and we do not get expected results. • Numerical relays and PMU are microprocessor based devices so require very less power compare to Electromechanical relay for testing.

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o instrument Requirements Desired ©DTesting

• Relay test kit which can test old generation relays to modern microprocessor based relays – – – – –

Electromechanical relays Electrostatic relays Numerical relays PMUs Energy meters and transducers

• Flexible Configurations – 4 voltages + 4 currents minimum – 6 currents for differential schemes

• Enough Power to Test the Scheme • High Power is required across all test currents – Can only be achieved by switchable ranges

• Reliable & Guaranteed Output Waveforms • Designed for Field Operation • Technical Support Title

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Technical offerings • Voltage Generator 6 voltage sources User can select any nos of voltage out of 6 voltages Multiple ranges 75/150/300 V automatically selected by software Can be used for end to end testing of Main I & Main II protection Can be converted to low level current signals for testing high burden electromechanical relays – Convertible voltage sources can offer compliance voltage as high as 300V. These are suitable for testing old generation electromechanical over current and earth fault protection relays most efficiently and authentically. – Selective current resolution up to 100uA in convertible sources. – – – – –

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o Current ©DGenerator

6 current sources Multiple Current range 8.75/17.5/35A Constant compliance voltage for a selected current range. Enhanced rating having highest current capability in one instrument. • All sources can be parallel for higher output • • • •

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F6000: Power Output vs. Current

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Output power

150 125 100 75 50 0 0

10

20

35

Output current

Compliance Voltage = 20 Volts Title

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F6000: ©DoPower Output vs. Current 17.5 A Range: 175 VA

175

Output power

150 125 100 75 50 0 0

10

20

35

Output current

Compliance Voltage = 10 Volts Title

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F6000: Power Output vs. Current 35 A Range: 175 VA 175

Output power

150 125 100 75 50 0 0

10

20

35

Output current

Compliance Voltage = 5 Volts Title

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Doble Do ©Benefits

• Single box solution for complete scheme testing • No need to get confused about selecting suitable model for your versatile needs. • Modular design which saves repairing time and cost. • Output of amplifiers are independent of input supply variations due to back to back amplifier design. • Easy to upgrade design. The interfaces like IEC61850, Meters and transducer or GPS etc. can be activated by just upgrading the firmware. The users can do it independently. • Flexible Software to test your way Title

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Continue…. • All specifications are for worst case operating condition • Source ratings independent of power factor of load • Source ratings independent of dynamic changes in load characteristics • Sources independent of each other • Sources have AC/DC output • Rugged Design – intended for field use • Most power in a single instrument • Repair and Calibration available in the region • 12 sources simultaneously Title

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o from Customer Common ©DQueries • • • • •

Burden Capacity: More than 400VA Compliance Voltage Voltage Generator: 4X 300V Self Calibration Design & Size

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Doble Solutions • Burden Capacity & Compliance Voltage: – High burden capacity and compliance voltage needed for testing of electromechanical relay at low plug setting. – Doble Power System Simulator has two current generator option • Right bank current generators which is able to test all numerical, static and low impedance electro-mechanical relay. • Left bank V/I generators which is able to supply high compliance voltage and low level current for high impedance electro-mechanical relay testing. • Compliance voltage up to 300 V can be supplied by F6150 which is highest in available instruments. Title

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Competitive ©Do Analysis

Suppose VA per phase of XX instrument is 1000VA and highest current is 30 A. compliance voltage = VA Capacity/ Max Current = 1000 VA/ 30 A = 33.33 V Out put power at 0.2 A = compliance voltage X current = 33.33 X 0.2 = 6.66 VA

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XX Instrument

Doble Power Simulator

Output power

Compliance Output voltage power

Compliance voltage

0.2 A

6.8 VA

34 V

60 VA

300V

0.4 A

13.6 VA

34V

120 VA

300 V

0.6 A

20.4 VA

34V

90 VA

150 V

0.8A

27.2 VA

34V

120 VA

150 V

1.0 A

34 VA

34V

150 VA

150 V

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F6000: Power Output vs. Current

175

Output power

150 125

125 VA

100 75 50

50 VA

0 0

10 Output current

20

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Competitive ©Do Analysis

• Voltage Source: 4X 300 V at 85 VA – Doble offers 6 X 150 V at 75 VA or 3X300V at 150VA – Standard PT Secondary L-N voltage is 63.5V – So 150 V is approx 240 % of standard PT voltage which is sufficient for all relay testing requirements – Generally 3 voltage sources used for testing – if only 3 voltage sources are used then output power is 150VA of each source which is highest in available instruments. – 6 voltage sources used for simultaneously Main I and Main II protection scheme in end to end testing

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Competitive Analysis • Self Caliberation: – The philosophy of calibration needs an external standard reference so the need of self calibration does not apply. – Doble F6150SV provides inbuilt checks that inform if there is any internal measurement error. – Doble provides F6080 as an additional hardware option for calibration verification. – It is recommended to utilize services from the Doble service center that has calibration facility. • Size and Design: – Size is slightly big due to Modular design but it reduces repairing cost and time – Back amplifier design Title

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New© Products Do

• F6150 SV Power System Simulator – – – – –

Enhanced power model of F6150 Compliant to IEC 61850 Station bus and Process bus testing Compliant for PMU Testing Can operated through WiFi, USB and Ethernet communication Highest current capacity in single instrument

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F6051 IRIG-B to GPS Converter

Provide reliable time synchronization from existing Station Satellite clock sources Title

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o to GPS Converter F6051 IRIG-B ©D

The F6051 converts modulated or demodulated IRIG-B signals to GPS, allowing you to have synchronized signals for the F6150. Title

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F6051 IRIG-B to GPS Converter • For interior use – If you are unable to run a satellite antenna cable outside because doors and window cannot be opened for prolong periods

• End-to-end testing – Ideal for end-to-end testing in locations where an IRIG-B source is available

• Phasor measurement units – Useful for testing of PMUs per IEEE standard C37.118

• IEC61850 compliant testing – Capable of IEC compliant testing where time stamped requirements are a must for Goose and Sampled Values message monitoring and evaluation. Title

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New© Softwares Do

• F6Test 3.10.2 – Compliant for Sampled value ( IEC 61850 Process Bus Testing) – Support for enhanced current amplifier ranges with F6150sv instruments – Additional relay models have been added to the impedance relay and differential relay library. – full Windows 7 compatibility

• Protection Suite 2.1 – One software for complete Steady state, Transient and Dynamic Testing of relays – Compliant for PMU Testing – Compliant for meter and transducer Interface Title

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Why Doble Engineering? • Protection Test Instruments Sold in more than 110 countries Worldwide • Why? – Quality – Support – Conferences & Applications – Creating equipment that meets requirements & exceed expectations – Reputation – The Industry Standard – Continuous improvement with change in technology – Leader in diagnostic test instruments

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o Doble Support ©D

• DSA Membership – – – – –

Upto 1960 Doble conference online data access Conference and user group meetings Ask doble for solution of technical queries from Doble experts Doble instrument class room training at training center, Vadodara Training at client location

• Repairing and calibration at repairing center at Vadodara • Support on email and phone for technical and instrument operating problems.

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Continuous Improvement

We are ALWAYS working to IMPROVE Title

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Thank-you ©Dofor Listening

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