IEC Series Standards for MV-Switchgear IEC High-voltage switchgear and controlgear Part 1: Common specifications

Transcription

1 IEC Series Standards for MV-Switchgear IEC High-voltage switchgear and controlgear Part 1: Common specifications Olaf Bischur Siemens AG IC LMV MS R&D GIS TD 1PG

2 Topics 1. Standards Group IEC Common Specifications IEC Outlook of IEC Extension of validity of type tests IEC Slide 2 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

3 Structure of the group IEC IEC HV Switchgear and Controlgear Responsible IEC committee Part 1 99 Generic standards SC 17A / 17C Part Switching Devices SC 17A Part Switchgear installations SC 17C Part Guidelines, reports etc. SC 17A / 17C Slide 3 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

4 Topics 1. Standards Group IEC Common Specifications IEC Outlook of IEC Extension of validity of type tests IEC Slide 4 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

5 IEC , Overview (1) This part of IEC 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 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 Slide 5 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

6 IEC , 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 Mechanical operation tests of switching devices e. g. IEC , Pressure withstand test for gas-filled compartments e. g. IEC Making and breaking capability of switching devices e. g. IEC Mechanical endurance tests of switching devices e. g. IEC , -102 Slide 6 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

7 IEC , Overview clauses 1. General 2. Normal and special service conditions 3. Terms and definitions 4. Ratings 5. Design and construction 6. Type tests 7. Routine tests 8. Guide to the selection of switchgear and controlgear 9. Information to be given with enquiries, tenders and orders 10.Transport, storage, installation, operation and maintenance 11. Safety 12.Influence of the product on the environment Slide 7 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

8 IEC , Overview type tests 1. General 2. Dielectric tests 3. Radio interference voltage (r.i.v.) test 4. Measurement of the resistance of circuits 5. Temperature-rise tests 6. Short-time withstand current and peak withstand current tests 7. Verification of the protection 8. Tightness tests 9. Electromagnetic compatibility tests (EMC) 10.Additional tests on auxiliary and control circuits 11. X-radiation test procedure for vacuum interrupters Slide 8 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

9 IEC , details type tests, General (1) Clause 6.1: General The 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 , 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 Slide 9 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

10 IEC , 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 Slide 10 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

11 IEC , details type tests, dielectric tests Clause 6.2: Dielectric tests This 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 Slide 11 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

12 IEC , 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. Slide 12 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

13 IEC , details type tests, measurement of the resistance Clause 6.4: Measurement of the resistance of circuits Not 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 Slide 13 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

14 IEC , 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, Slide 14 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

15 IEC , 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 Slide 15 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

16 IEC , 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 (test with an access / object probe or water) Verification of the IK coding in accordance with IEC (test with a hammer / ball) Slide 16 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

17 IEC , details type tests, Tightness tests Clause 6.8: Tightness tests Will 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 Slide 17 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

18 IEC , 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) Slide 18 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

19 IEC , 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.) Slide 19 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

20 IEC , 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 Slide 20 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

21 Topics 1. Standards Group IEC Common Specifications IEC Outlook of IEC Extension of validity of type tests IEC Slide 21 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

22 IEC , 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 C 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 Slide 22 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

23 Topics 1. Standards Group IEC Common Specifications IEC Outlook of IEC Extension of validity of type tests IEC Slide 23 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

24 IEC : Extension of validity of type tests - Because of the variety of types, it is not practicable to make type tests with all the arrangements of metal-enclosed switchgear and controlgear (see also IEC , clause 6.1). - IEC : Guidance for the extension of validity of type tests - Responsible for the transfer of test results is the manufacturer Slide 24 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage

25 IEC Thank you for your attention Slide 25 Olaf Bischur Sector Infrastructure & Cities, Medium Voltage