FN12-12D/630-50H.V. load break switch

Detailed Product Description

Summary

It is a three phase H.V switch equipment of 12KV. 50Hz for breaking or closing load current. no-load transformer cable charging current and closing short-circuit current. The load switch with earth switch can bear short-circuit current.

It is made up of FN12-12D load switch and SLAJ-12(XRNT-10) H.V current-limiting fuse box. It can break any current, load switch breaking working current and fuse box breaking short-circuit current. jointly breaking any current between short-circuit current. meantime. fuse box make the switch off of with the striker.


Application

It is used in the ring network city distribution and industrial equipment of 12KV and three-phase AC 50Hz to cortrol load and short-circuit. because the switch with fuse protecting transformer etc more reliably than circuit breaker. It is especialy suitable for ring network clouble radial distribution and package substation.


Standard

a. GB3804-90 <<3-63KV AC H.V load switch>>.

B. GBXXXX-XX <<AC H.V load switch with fuse box>>(the same IEC420-1990).

C. GB1995-89 <<AC H.V isolate switch and earth switch>>.

Number	Name	Unit	FN12-12D/630-20	FN12-12D.R/100-31.5
1	Rated voltage	kV	12
2	Rated frequency	Hz	50
3	Reated current	A	630	100
4	Lighting impulse resisting voltage	kV	75/85
5	1min power frequency with stand voltage	kV	42/48
6	Rated heat - stability current	kA	204S
7	Rated machine-stability current	kA	50
8	Rated closing current (peak)	kA	50	50
9	Rated short-circuit breaking current	kA	31.5
10	Rated transfer current	kA	1.5
11	Max. breaking current	kA	1.8
12	Breaking no-load transformer capacity	Kva	1250
13	Rated cable charging current	A	10
14	Rated power load current breaking times	>100
15	Switch-off time of rated power load current switch on-and-off	S	>0.06
16	Earth switch heat-stability current	kA	20	20
17	Earth switch heat-stability curreak (peak)	kA	50	50
18	Motor operating power valtage	V	AC220,110