12kv 24kv 33kv Ring Main Unit Sf6 Gas Air Insulated Switchgear
General
RMR-40.5KV fully insulation SF6 gas switchgear(SF6 gas ring main unit)is according to GB/IEC standard to design a high safety margin modular switchgear.
RMR-40.5KV system combination switchgear systems can be divided into three main unit cabinet:
(1) A three-position switch cable switch unit, and can be configured to display additional charge arrester and ground fault components. Code C.
(2)A three-position switch plus fuse tripping system and a lower grounding switch interlock system fuse combination unit, and can be configured to live display, display additional charge arrester and ground fault components. Code F.
(3) A three-position switch plus vacuum circuit breaker combination unit, and can be configured to current transformer, live display, display additional charge arrester and ground fault components. Code V.
The combination of the current transformer and microcomputer comprehensive security constitute the basic line protection.
Microcomputer comprehensive security passive protection, CT to take power without a separate power supply PT.
Use of environment
Air temperature: -40ºC~+40ºC, average daily difference of not more than 25ºC,
Altitude: ≤4000m(any special requirements to be noted)
Wind speed:≤35m/s
Equipment level: less than 8°
Technical specifications
General
RMR-40.5KV fully insulation SF6 gas switchgear(SF6 gas ring main unit)is according to GB/IEC standard to design a high safety margin modular switchgear.
RMR-40.5KV system combination switchgear systems can be divided into three main unit cabinet:
(1) A three-position switch cable switch unit, and can be configured to display additional charge arrester and ground fault components. Code C.
(2)A three-position switch plus fuse tripping system and a lower grounding switch interlock system fuse combination unit, and can be configured to live display, display additional charge arrester and ground fault components. Code F.
(3) A three-position switch plus vacuum circuit breaker combination unit, and can be configured to current transformer, live display, display additional charge arrester and ground fault components. Code V.
The combination of the current transformer and microcomputer comprehensive security constitute the basic line protection.
Microcomputer comprehensive security passive protection, CT to take power without a separate power supply PT.
Use of environment
Air temperature: -40ºC~+40ºC, average daily difference of not more than 25ºC,
Altitude: ≤4000m(any special requirements to be noted)
Wind speed:≤35m/s
Equipment level: less than 8°
Technical specifications
| No. | Item | Unit | Parameter | |
| 1 | Rated voltage | KV | 40.5 | |
| 2 | Power frequency withstand voltage | dry | 80/95 | |
| wet | ||||
| Lightning impulse withstand voltage | 170/185/200 | |||
| 3 | Rated current | A | 630 | |
| 4 | Rated short circuit breaking current | KA | 20/25(V)31.5(F) | |
| 5 | Rated breaking current loop | A | 630(C) | |
| 6 | Rated cable charging breaking current | A | 50(C) | |
| 7 | Rated cable charging breaking current | A | 10(C) | |
| 8 | Rated excitation transformer breaking current | A | 16 | |
| 9 | Rated making current peak | KA | 50/2.5(/) (main switch/earth) | |
| 10 | Rated peak withstand current | |||
| 11 | Rated short time withstand current | 20 | ||
| 12 | Rated short time withstand time | S | 4 | |
| 13 | Mechanical life | times | C/F(2000)V(10,000) | |