IEEE Std C37.122.7-2021 pdf download – IEEE Guide for Field Testng of Gas-Insulated Substatons Rated Above 52 kV.
ASTM D1048, Standard Specifcation for Rubber Insulating Blankets. 6 IEC 60840, Power cables with extruded insulation and their accessories for rated voltages above 30 kV (U m = 36 kV) up to 150 kV (U m = 170 kV)—Test methods and requirements. 7 IEC 62067, Power cables with extruded insulation and their accessories for rated voltages above 150 kV (U m = 170 kV) up to 500 kV (U m = 550 kV)—Test methods and requirements. IEC 62271-203, High-voltage switchgear and controlgear—Part 203: Gas-insulated metal-enclosed switchgear for rated voltages above 52 kV. IEEE Std 80™, IEEE Guide for Safety in AC Substation Grounding. 8,9 IEEE Std C37.100.1-2018™, IEEE Standard for Common Requirements for High-Voltage Power Switchgear Rated Above 1000 V. IEEE Std C37.122-2021™, IEEE Standard for High Voltage Gas-Insulated Substations Rated Above 52 kV. IEEE Std C37.122.1™, IEEE Guide for Gas-Insulated Substations Rated Above 52 kV. IEEE Std C37.301™, IEEE Standard for High-Voltage Switchgear (Above 1000 V) Test Techniques—Partial Discharge Measurements. IEEE Std C57.13™, IEEE Standard Requirements for Instrument Transformers. IEEE Std C57.13.3™, IEEE Guide for Grounding of Instrument Transformer Secondary Circuits and Cases.
4. Field testing in accordance with IEEE Std C37.122™ 4.1 Introduction In most cases, field tests performed on newly installed gas-insulated substation (GIS) are not repeats of the factory tests, but rather tests required to confirm that both the GIS has been assembled properly at site, and that there is no damage caused by shipping or installation. This guide will describe the tests required on the newly installed GIS systems, why these feld tests are performed, and why certain tests are repeated in the feld when they were already completed in the factory. Following the discussion of the individual tests, certain best practices will be described that will assist the testing effort in dealing with unique situations or typical questions commonly encountered during feld testing of GIS. Please refer to the feld-testing clause, in IEEE Std C37.122.1™ for additional information. 11 4.2 Mechanical tests: Leakage 4.2.1 Introduction This test is performed to demonstrate that there are no gas leaks at the field assembled joints of the GIS. Leaks may occur during field assembly as a result of the following: — Sealing surface damage — Improper placement, damage or omission of seals — Improper application of lubricants and sealants — Improper alignment and tightening of the mating surfaces — Contamination