Dnk Low Voltage Fuse Switch Disconnector

Our offered DNK Low Voltage Fuse Switch Disconnectors are mainly applied in AC10-40.5KV 50HZ power supply sistem as devices to switch the unloaded high voltage lines with charge and isolate the electical devices such as high voltage bus and breaker etc to repair. These switches are widely used in industries like electric power, railway, mining and oil field.

Environment condition
Ambient temperature: - 40A C~+55A C
Wind pressure: no more than 700Pa (equivalent to a wind velocity of 35m/s)
Elevation: no more than 2000m

Technical standard:-
IEC62271-102:2002 a High-Voltage Disconnect Switcha
GB1985-2004 a AC High -Voltage Disconnect Switch and Earthing Switcha
GB/T11022-99 a General Technical Specifications for High -Voltage Switching Devicesa

Product feature:-
* Equipped with self-lock single phase made of copper the switches provides the function that with the structure the main contact knife will not be released from the safety device under the electro-dynamical force when short circuit happens. This structure ensures the high reliability and safety of operation.
* Composed of the double a layered, cold-drawn and round edged copper knife blade which is processed with silver-plating technology for preventing from oxidation the main contact knife presents the advantages such as high conductivity and low contact resistance.
* Composed of integral cast copper elements which surfaces are silver-plated.