China-Fn7-12dr-Air-Load-Break-Switch-with-Fuse-Holder-and-Earth-Switch

FN7-12DR
INDOOR LOAD BREAK SWITCH
12KV 400A,630A...
WITH FUSE HOLDER, CAN USE XRNT FUSE WITH TRIPPER. WITH EARTH SWITCH (GROUDING SWITCH)
WITH RIGHT SIDE OR LEFT SIDE OPERATE PANEL.

Summary
FN7-12DR is used in three-phase AC power network of AC 50Hz,rated voltage 12KV for breaking load current and controlling short-circuit current.
FN7(C)-12 type H.V load switch and fuse box is basied on the FN7-12 series H.V load switch. with operating mechanism. Make the installation more simpler. Can meet orders needs.

Normal Serviec Condition
1,The altitude does not exceed 1000m.2,The ambient air temperatrue : Max:+40oC. Min:-25oC.
3,The relatire humidity of air Daily average â‰¤95% . Monthly average â‰¤90%
4,The ambient air should not be obviously polluted by corrosivity or the flammability gas steam.Etc.
5,The working situation without frequent violent.

Appearance installation diagram

Summary

Classification	Type	DS Earth switch at the wire-in end Â	DK Earth switch at the wire-in end	L Interlock device	R Fuse box	RA String fuse box	F Off device by motor
Without tripper	FN7-12	_	_	_	_	_	_
	FN7-12DSL	Â Î”	_	Â Î”	_	_	_
	FN7-12DXL	_	Â Î”	Â Î”	_	_	_
	FN7-12R	_	_	_	Â	_	_
	FN7-12DSLR	Â Î”	_	Â Î”	Â Î”	_	_
	FN7-12DXLR	_	Â Î”	Â Î”	Â Î”	_	_
With striking tripper	FN7-12RAF	_	_	_	_	Â Î”	Â Î”
	FN7-12DSLRAF	Â Î”	_	Î”	_	Â Î”	Â Î”
	FN7-12DXLRAF	_	Â Î”	Â Î”	_	Â Î”	Â Î”

Specified parameter

Â (KV) Rated voltage	(KV) Max.voltage	(A) Rated current	(KV) 1min power frequency withstand voltage	Â (KA) 4S heat-stabling current(value)	Â (KA) Machine stabling current(peak)	Â (KA) Short-circuit controlling current	(A) Rated switch-off current	(A) Rated transfer current
12	12	400	42/48	12.5	31.5	31.5	400	1000
12	12	630	42/48	20	50	50	630	1000

Rated parameter of fuse box

Rated voltage	(KV) Rated current	(A) Rated switch-off current	(A) Fuse body rated current
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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Copper PCB

Copper substrate is the most expensive metal substrate, and its thermal conductivity is many times better than that of aluminum substrate and iron substrate. It is suitable for high-frequency circuits, areas with large changes in high and low temperature, and the heat dissipation and architectural decoration industries of precision communication equipment. The copper substrate circuit layer has great current carrying capacity and thermal aging resistance.

Heavy Copper PCB,Board Metal Substrate,Copper Substrate,Thermal Conductivity of Copper Board,Aluminum PCB Thermal Conductivity

Huizhou Liandajin Electronic Co., Ltd , https://www.ldjcircuitboard.com