![The role of high-voltage disconnect switch]()
High-voltage disconnect switch is an important switching appliance in the electrical system of power plants and substations, which needs to be used in conjunction with high-voltage circuit breakers.Put into the load current and open the short-circuit current, only can be used for certain switching operations that do not produce a strong arc, that is, it does not have the function of arc extinguishing; according to the different installation locations are divided into, house type and outside the house type, according to the number of insulated pillars are divided into, single column type, double column type and three column type, each voltage level have optional equipment.
High Voltage Disconnect Switch Failure
Porcelain vase fracture fault mechanism problems fault prevention and control causes the above isolation switch defects or faults, both manufacturing process .Some of them are due to improper maintenance and repair.To ensure the safe operation of the disconnect switch, it is crucial to ensure its initial quality.
High-voltage disconnect switch parameters
The mainstream models of FN5-12 high-voltage disconnect switch products are: FN5-12/400-63,FN5-12R/400-630,FN5-12D/400-630FN5-12RD/400-630,FN5-12RL/400-630,FN5-12DRL/400-630 Main technical parameters: Rated voltage.12kv one minute frequency withstand voltage: 42kv rated current: 400A4 second thermal stability current: 12.5A dynamic stability current: 31.5kA rated opening current: 400A short circuit closing current: 31.5AJN15-12 high voltage disconnect switch products mainstream models are: JN15-12/31.5-210,JN15-12/31.5-230,JN15-12/31.5-250,JN15-12/31.5-275JN15-12/40-210,JN15-12/40-230,JN15-12/40-250,JN15-12/40-275Main technical parameters: Rated voltage: 12kvRated frequency: 50HzRated current: 630-1250A rated thermal stability current: 21.5-31.5kA rated dynamic stability current: 63-83kAFZN21-12 high-voltage isolation switch products of the mainstream models are: FZN21-12/630-20,FZN21-12D/630-20,FZN21-12/t630-20FZRN21-12D/T1250-31.5,FZN21-12RD/1250-31.5,FZN21-12RD/1250-31.5 Main technical parameters: Rated voltage: 12kV Rated current: 630A Rated active load breaking current: 630A 4S thermal stability current: 20kA dynamic stability current: 50kA
High-voltage disconnect switch type
The types of high-voltage disconnect switches can be divided into indoor type and outdoor type according to the erection location.The type of high-voltage disconnect switch can be divided into indoor type, outdoor type and grounded type, and the type can be divided into grounded type and ungrounded type according to the grounding gate.The model number consists of letters and numbers:
The role of high-voltage disconnect switch
High-voltage disconnect switch has obvious segmentation gap, so it is mainly used to isolate high-voltage power supply, ensure safe maintenance, and can pass a certain small current.It does not have a special arc extinguishing device, so it is not allowed to cut off the normal compound power supply, let alone to cut off the short-circuit current.Because the isolation switch has obvious segmentation gap, it is usually used in conjunction with circuit breakers.