FN7-12D 12KV LBS indoor Medium voltage load break switch with earthing switch
ABB NAL series 12KV LBS medium voltage load break switch for RMU similar as
12KV MV Outdoor Off-Load overhead line isolator disconnector LBS load break switch
As a protection and control unit for power grid equipment and industrial and mining enterprise power design
Mainly used for opening closing the power system load current, overload current and short - circuit current
12KV MV VCB outdoor high voltage vacuum circuit breaker with controller
Disconnectors , also known as Isolators, are used in HV and MV installations to isolate a circuit or parts of a circuit and to ensure, for safety reasons, to the operators and maintenance teams a visible interruption of the circuit.
High voltage isolating switch is widely used in power stations and substations. Because it has no arc extinguishing device, so it can not be used to cut off the load current, but can not cut off the short circuit current, usually used with high voltage circuit breaker.
GN30-12 indoor rotary high-voltage isolating switch is a new type of rotary contact knife isolating switch.
GN27 (GN2)-40.5 indoor high-voltage isolating switch is a three-phase AC 50Hz high-voltage switching device.
GN27 (GN2)-40.5 indoor high-voltage isolating switch is a three-phase AC 50Hz high-voltage switching device.
Solve the pollution flashover problem that occurs during the operation of the isolating switch.
The complete set of isolating switch is composed of GW4-252 isolating switch body, CS14G or CS17G human operating mechanism, transmission accessories, etc.
GW5-40.5、72.5、126 Series outdoor high voltage AC disconnector
The isolating switch consists of a bracket, a base, a pillar insulator, a contact, a wiring board and other parts.
How to choose a medium voltage Disconnector switch?
The conditions for selecting a voltage isolating switch can be divided into technical conditions and environmental conditions.
(1) Technical conditions.
1) Choose according to normal technical conditions: this includes voltage, current, frequency and mechanical load.
2) According to short-circuit stability verification, this includes dynamic stability, thermal stability and duration verification.
3) According to the ability to withstand overvoltage: this includes the insulation level between the ground and the fracture, the creepage distance of the external insulation, etc.
(2) Environmental conditions.
This includes ambient temperature, daily temperature difference (outdoor use), maximum wind speed (outdoor use), relative humidity (outdoor, interior use), pollution conditions (outdoor use), altitude, seismic intensity, etc.
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