1.Product description
Gas insulated ring main unit is for the secondary distribution network 11/17.5/24/36 kV. It is a completely sealed system with a stainless steel tank containing all live parts and switching functions. A sealed steel tank with constant atmospheric conditions ensures a high level of reliability as well as personnel safety and a virtually maintenance-free system.
4.Standards
IEC 62271-100 high voltage alternating current circuit breakers6.The main technical date
Item | Unit | Switch | Switch-fuse | Vacuum circuit-breaker |
Rated voltage | kV | 24 | 24 | 24 |
Power frequency withstand voltage | kV | 50 | 50 | 50 |
Impulse withstand voltage | kV | 125 | 125 | 125 |
Rated current | A | 630 | 2001) | 200 |
Breaking capacities: | ||||
active load | A | 630 | ||
closed loop | A | 670 | ||
off load cable charging | A | 141 | ||
off load transformer | A | 20 | ||
earth fault | A | 160 | ||
earth fault cable charging | A | 91 | ||
short-circuit breaking current | kA | see 2) | 16 | |
Making capacity | kA | 40 | see 2) | 40 |
Short time current 0,5 sec | kA | 16 | ||
Short time current 1 sec | kA | 16 | ||
Short time current 3 sec | kA | 16 |
SF6 Full metal closed ring main unit swich and mechanism
NO. | Name | Description |
1 | Circuit Break+Isolator switch | Three positions |
2 | Circuit Break+Isolator switch | Two positions |
3 | SF6 gas insulated substation earthing switch | |
4 | SF6 gas insulated substation load break | Three positions |
5 | SF6 gas insulated substation load break, | Two positions |
6 | Spring Mechanism | Substation C manual mechanism |
7 | Spring Mechanism | Substation C electric mechanism |
8 | Spring Mechanism | Substation C electric mechanism(with secend wires) |
9 | Spring Mechanism | Substation F manual mechanism |
10 | Spring Mechanism | Substation F electric open mechanism |
11 | Spring Mechanism | Substation F electric mechanism |
12 | Spring Mechanism | Substation F electric mechanism(with secend wires) |
13 | Spring Mechanism | Substation V manual mechanism with isolator |
14 | Spring Mechanism | Substation V electric mechanism with isolator |
15 | Spring Mechanism | Substation V electric mechanism with isolator(with secend wire) |