iec 62271 – series standards for mv-switchgear© siemens ag 2014 all rights reserved. iec 62271...

© Siemens AG 2014 All rights reserved.

IEC 62271 – SeriesStandards for MV-SwitchgearIEC 62271-1 High-voltage switchgear and controlgear –Part 1: Common specifications

Olaf BischurSiemens AGIC LMV MS R&D GIS TD 1PG


Slide 2 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

Topics

1. Standards Group IEC 62271

2. Common Specifications IEC 62271-1

3. Outlook of IEC 62271-1

4. Extension of validity of type tests IEC 62271-307



Structure of the group IEC 62271

IEC 62271 HV Switchgear and Controlgear

Part 1 – 99 Generic standards

Part 100 – 199 Switching Devices

Part 300 – 399 Guidelines, reports etc.

Part 200 – 299 Switchgear installations

ResponsibleIEC committee

SC 17A / 17C

SC 17A

SC 17C

SC 17A / 17C



Topics







IEC 62271-1, Overview (1)

This part of IEC 62271 applies to a.c. switchgear and controlgear designed for indoor and outdoor installation and for operation at service frequencies up to and including 60 Hz on systems having voltages above 1 000 V.

This standard defines common requirements about general conditions(e. g. indoor, outdoor, temperature and humidity, etc.)• Terms and definition (e. g. wording incl. cross reference to

IEV international electrotechnical vocabulary)• Ratings (e. g. scientific notation, values, etc.)• Design and construction(e. g. requirements for liquids, gas, earthing, enclosure, etc.)

• Type and routine tests (general kinds, valid for all switchgear and controlgear)• Information to be given with enquiries, tenders and orders



IEC 62271-1, Overview (2)

This standard gives information about common terms.

Out of scope of this standard are requirements of certain design solutions e. g.

- Internal arcing test e. g. IEC 62271-200

- Mechanical operation tests of switching devices e. g. IEC 62271-100, -200

- Pressure withstand test for gas-filled compartments e. g. IEC 62271-200

- Making and breaking capability of switching devices e. g. IEC 62271-100

- Mechanical endurance tests of switching devicese. g. IEC 62271-100, -102



IEC 62271-1, Overview clauses

1. General2. Normal and special service conditions3. Terms and definitions4. Ratings5. Design and construction6. Type tests7. Routine tests8. Guide to the selection of switchgear

and controlgear9. Information to be given with enquiries,

tenders and orders10.Transport, storage, installation,

operation and maintenance11.Safety12. Influence of the product on the environment



IEC 62271-1, Overview type tests

1. General2. Dielectric tests3. Radio interference voltage (r.i.v.) test4. Measurement of the resistance of circuits5. Temperature-rise tests6. Short-time withstand current and peak withstand

current tests7. Verification of the protection8. Tightness tests9. Electromagnetic compatibility tests (EMC)10.Additional tests on auxiliary and control circuits11.X-radiation test procedure for vacuum interrupters



IEC 62271-1, details type tests, General (1)

Clause 6.1: GeneralThe type tests shall be made on representative functional units. Because of the variety of types, ratings and possible combinations of components, it is not practicable to make type tests with all the arrangements of metal-enclosed switchgear and controlgear. (see also IEC 62271-200, clause 6.1)

This clause gives information about

• Grouping of tests

• Information for identification of specimens (drawings, part-lists, …)

• Information to be included in type-test reports



IEC 62271-1, details type tests, General (2)

Clause 6.1: Information to be included in type-test reports

• Manufacturer

• Type designation and serial number

• Rated characteristics

• General description of the test object

• Manufacturer, type, serial numbers and ratings of essential parts

• General details of the supporting structure

• Details of the operating-mechanism

• Photographs to illustrate the condition before and after test

• Sufficient outline drawings and data schedules

• Reference numbers of all drawings to identify the essential parts

• Details of the testing arrangements

• Records of the test quantities



IEC 62271-1, details type tests, dielectric tests

Clause 6.2: Dielectric testsThis clause gives information about• Ambient air conditions during tests (humidity, …)• Condition of the test specimen• Criteria to pass the test• Application of the test voltage and test conditions• Kind of tests (Power-frequency, Lightning impulse, Switching impulse, Partial discharge, tests on auxiliary and control circuits) with criteria to past the tests



IEC 62271-1, details type tests, r.i.v. test

Clause 6.3: Radio interference voltage (r.i.v.) test

This test applies only to switchgear and controlgear having rated voltages of 123 kV and above.

For medium voltage switchgear and controlgear the r.i.v. effects are of a low level and are negligible.



IEC 62271-1, details type tests, measurement of the resistance

Clause 6.4: Measurement of the resistance of circuitsNot a “stand alone” type test.A measurement of the resistance of the main circuit shall be made for comparison between the switchgear and controlgear type tested for temperature rise and all other switchgear and controlgear of the same type subjected to routine tests (see routine test clause 7.3).Also to perform before and after “short-time withstand current and peak withstand current tests” and “making and breaking capability tests” as a condition check.

100 A current source



IEC 62271-1, details type tests, temperature-rise tests

Clause 6.5: Temperature-rise tests

This clause gives information about• Condition of the test specimen• Condition of the testing area (e. g. max. wind speed, …)• External connection to the test specimen (incoming, short-circuit link)

• Kind of measurement of the temperature and temperature-rise• Interpretation of the temperature-rise tests• Definition end of test (normal after five times the thermal time constant)

More details about number of phases to be tested, value of test current, transfer of results to other frequencies as tested, preheating the circuit with a higher value of current to save testing time, …



IEC 62271-1, details type tests, short-time withstand current and peak withstand current test

Clause 6.6: Short-time withstand current and peak withstand current

Similar to the test before with• Condition of the test specimen and test current (e. g. three-phase or single-phase test)

• Test current and test duration• Behavior of the test specimen during test• Condition of the test specimen after test



IEC 62271-1, details type tests, verification of the protection

Clause 6.7: Verification of the protection

Tests only necessary in case of doubt • Verification of the IP coding in accordance with IEC 60529 (test with an access / object probe or water)

• Verification of the IK coding in accordance with IEC 62262 (test with a hammer / ball)



IEC 62271-1, details type tests, Tightness tests

Clause 6.8: Tightness testsWill be performed typically before and after the mechanical operation test or during the operation tests at extreme temperatures.

Three kinds of systems:• Controlled pressure systems for gas (not longer state of the art) • Closed pressure systems for gas • Sealed pressure systems



IEC 62271-1, details type tests, Electromagnetic compatibility tests (EMC)

Clause 6.9: Electromagnetic compatibility tests (EMC)

Emission tests from the main circuits (radio interference voltage test, r.i.v.) not necessary because the r.i.v. effects are of a low level and are negligible; see clause 6.3.

Two topics in this clause:

• Emission tests from the auxiliary and control circuits

• Immunity tests on auxiliary and control circuits (electrical fast transient / burst, oscillatory wave immunity)



IEC 62271-1, details type tests, Additional tests on auxiliary and control circuits

Clause 6.10: Additional tests on auxiliary and control circuits

Tests to qualify the whole assembly without repeating individual tests on components.

• Functional tests to verify the proper functioning of auxiliary and control circuits• Electrical continuity of earthed metallic parts test• Verification of the operational characteristics of auxiliary contacts (unless the equipment has passed the whole type tests as a functional unit)

• Environmental tests• Dielectric test (2 kV / 1 min.)



IEC 62271-1, details type tests, X-radiation test procedure for vacuum interrupters

Clause 6.11: X-radiation test procedure for vacuum interrupters

The purpose of this type test is to verify that the X-radiation emitted from vacuum interrupters does not exceed specified limits.

Clauses imply:• Mounting of specimen for testing• Radiation instrument to verify the X-radiation• Location of radiation instrument • Test voltage and measurement procedure



Topics







IEC 62271-1, outlook

Future trend; no major technical changes

• Including of UHV (ultra high voltage)• EMC: in relation with Guide 107 and Cenelec request• Harmonization of content with IEEE C37.100.1• Check of definitions and references• Modification of chapter 4.4, new headline: "Rated continuous current” instead of “rated normal current”

• Including new annex “Extension of validity of type tests“• …



Topics







IEC 62271-307: Extension of validity of type tests

- “Because of the variety of types, … it is not practicable to make type tests withall the arrangements of metal-enclosed switchgear and controlgear (see also IEC 62271-200, clause 6.1).

- IEC 62271-307: Guidance for theextension of validity of type tests

- Responsible for the transferof test results is the manufacturer



IEC 62271-1

Thank you for your attention

iec 62271 – series standards for mv-switchgear© siemens ag 2014 all rights reserved. iec 62271...

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