12KV Load Break Switch

• Summary
• The AC H.V load switch FN7-12DR is a new type gas using indoor hv load switch, adapt to 3 phases AC electrical power system with the frequency 50HZ and rated voltage 12KV. Used to breaking out the load current and cutting the short current.
• The H.V load switch with fuse combined electrical apparatus FN7-12DR added lateral operating system based on the FN7-12 Series, make the installation more flexible, meet different requirements of the customers.
• Main specification

• Sort	Type	DS Earthing on coil in tnterface	DX Earthing on coil out interface	L Interlock device	R Fuse	R Striking fuse	F Electromotion break-brake device
  Without release	FN7-12
  	FN7-12DSL	*		*
  	FN7-12DXL		*	*
  	FN7-12R				*
  	FN7-12DSLR	*		*	*
  	FN7-12DXLR		*	*	*
  With striking release	FN7-12RAF					*	*
  	FN7-12SLRAF	*		*		*	*
  	FN7-12DXLRAF		*	*		*	*

• Rated Parameters

• Rated voltage (kV)	Maximum Voltage (kV)	Rated current (A)	1min power frequency withstand voltage (kV)	4S thermostable current (virtual value) (kA)	Dynamic stability current (peak value) (kA)	Short circuit open and close current (kA)	Rated open and breaking current (A)	Rated transfer current (A)
  12	12	400	42/48	12.5	31.5	31.5	400	1000
  		630	42/48	20	50	50	630	1000

• Fuse Rated Parameter

• Type	Rated voltage (kV)	Rated current (A)	Fuse link rated current (A)
  SDLA*J	12	40	6.3,10,16,20,25,31.5,40
  SFLA*J	12	100	50,63,71,80,100
  SKLA*J	12	125	125

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