An earthing switch is a safety device. It is used to open or to close a circuit when there is no current through them. Earth switches can be used to isolate a part of a circuit, a machine, a part of an overhead line or an underground line so as to ensure safe maintenance. Earthing switches are necessary to earth the conducting parts before maintenance and to provide deliberate short-current while testing.
This indoor MV earthing switch is applicable for AC 50HZ, 12Kv rated voltage power supply system. It conforms to GB/T1985-89 AC H.V. Disconnector and Earthing Switch and IEC-129. It is mainly used for earthing protection and can be matched with all kinds of H.V. switchgear. It is a whole style earthing switch. It is comprised of pedestal, supporting insulator, moving fixed contact, main shaft and swift spring.
Technical Parameters
| Rated voltage | 12/40.5Kv |
| Rated short-time withstand current | 31.5/40KA |
| Rated peak withstand current | 80/100KA |
| Rated duration of short-circuit | 4s |
| Rated short-circuit closing current | 80/100KA |
| Rated peak withstand current | 80KA |
| Center distance between poles | 150/165/210/230/250/275/350/385/460Kv |
| 1min P.F withstand voltage | phase to phase, to earth 42Kv, gaps49Kv |
| Lightning impulse withstand voltage(peak) | phase to phase, to earth 75Kv, gaps85Kv |
| Altitude | above sea level 1000-3000m |
| Ambient temperature | upper limits +40℃, lower limits -10℃ |
| Earthquake intensity | not exceeding 8 degree |
Huayi Electric Co., Ltd. is a major indoor high voltage earthing switch manufacturer in China and has been ISO9001: 2000 and ISO14001: 2004 certified. We are mainly engaged in manufacturing earthing switches, disconnect switches, wind turbine generators and other products. With advanced technology, excellent performance, long operating life and reliable quality, our products have been KEMA, GOST, CCC, TUV, WTGS and CB certified. They are successfully exported to more than 30 countries and regions, such as America, Germany, Russia, Iran, South Africa and Argentina. We welcome international customers to visit our company and look forward to working with you!
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