This ring main unit is new generation miniature vacuum ring main unit, to replace of SF6 ring main unit. It is suitable for rated voltage 12kV, frequency 50Hz ring power supply and dual power supply system. As an electric control and protect device, it can be placed in box-type substation. XGN68-12(F) indoor AC metal-enclosed ring main unit adopt modular design with vacuum interrupter and spring operating mechanism. It is compact in structure, small in size, simple in operation, reliable in interlock, long in mechanical life. This switch can open and close rated load current, close rated short-circuit making current, open transformer no-load current, open capacitive current between capacitor group and a certain distance of overhead lines. It can control, measure, protect the circuit and does reliable anti-misoperation interlock.

Overall dimensions

Technical parameters

No. Item Unit Value
1 Rated voltage kV 12
2 Rated current(Load switch、circuit breaker cabinet) A 630
3 Rated current(Combination switchboard) A 1250
4 Rated frequency Hz 50
5 Rated short-time withstand current(4s) kA 20
6 Rated short-circuit making circuit kA 20
7 Rated short-circuit breaking current(combination switchboard) kA 31.5
8 Rated active load breaking current(load swit) A 630
9 Rated peak withstand current kA 50
10 Rated loop breaking current(load switchboard) A 630
11 Rated junction current(combination switchboard) A 3150
12 Rated power frequency withstand voltage(1min) kV 40
13 Rated lighting impluse withstand current kV 75
14 Rated circuit breaker short-time operation time Times 30
15 Rated circuit breaker short-circuit current kA 20
16 Protection degree IP2X
17 operation Manual or electric

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