FZN25-12 Indoor AC HV vacuum Load break switch and FZRN25-12D Indoor AC HV vacuum load break switch with assembly fuse is the controlling and protecting equipment of three-phase 50Hz, 12kv distribution system, which is widely used in the situations of industrial and mining establishiments and power distribution station of urban buildings. Combined electrical apparatus can protec transformer and other electric equipments. it is used more reliable than circuit breaker. esbecially, it can be perfectly used in terminal substation and box-type substation of urban net and rural net in order to control and protect ring net birabdial electric unit.

++++Standard:
a. GB38041.1-90 <<3-63KV AC H.V load switch>>.
b. GB16926-97 <<AC H.V load switch with fuse box>>

C. IEC265-1 HV Load Switch No.1 : Rated voltage between 1kv and 52kv high voltage load switch
d. IEC420(1990). <<AC H.V load switch with fuse box>>

++++Technical Parameters:

No.	Name		Unit	FZN25-12/630-20	FZN25-12/(R)D125-31.5
1	Rated voltage		kV	12
2	Rated frequency		Hz	50
3	Reated current		A	630	less than 200
4	Rated insulating level	1min power frequency withstand voltage	kV	30
		1min power frequency withstand voltage	kV	42/48
		Lightning impulse resisting voltage	kV	75/85
5	Rated 4S heat - stability current		kA	20
6	Rated duration of short circuit		S	4
7	Rated dynamic current		kA	50
8	Rated active load breaking current		A	630
9	Rated closed loop breaking current		A	630
10	Rated cable charging current		A	10
11	Breaking no-load transformer capacity Max. breaking current		kvA	1600
12	Rated short circuit breaking current		KA		31.5
13	Rated transfer current		A		2000
14	Fuse model				SDLAJ-12,SFLAJ-12
15	Impactor output energy		J		2-5
16	Rated short circuit closing current		kA	50	80(expected peak)
17	Earth switch heat-stability current		KA	20
18	Earth switch rated duration of short circuit		S	2
19	Auxiliary loop rated pressure		V	220,110
20	Mechanical endurance		operations	10000