FKN12-12 Indoor load break switch (LBS) 12KV

FKN12-12D Series air- blast load break switch and FKRN12A- 12D series air- blast load break switch-fuse combination apparatus are new series switchgear applies to three- phase electric distribution system of rated 12KV, acting as protecting and control apparatus for transformers, cable and overhead wiring. These series are especially applicable in rural. urban terminal substation and prefabricated substations, as well as ring network power supply.

Product Detail

FKRN12-12 Series with fuse switch,it can break and make over-current, load current and short-circuit current(limited current fuse).

This product is featured with impact structure, aesthetic appearance reliable interlock and high insulating level. In the spring storage operating mechanism. ON/OFF speed is free from the influence of the manpower. For the arc-extinguish electric arc-extinguish inside the insulating cover. the free gas occurs at sparking do not cause descend of insulating level between phases and phase to earth. The insulating cover clapboard separates electrified part thus boost protection grade of ring main unit. The copper-tungsten contact and main contact brings along reliable conductivity and long life. This product achieves sound fame due to easy maintenance and operations as well as reliable performance. It is in compliance with per IEC62271-105.

Environment condition

The altitude: under 1000M.
The ambient temperature: -25℃-+40℃.
The relative humidity of air: monthly≤90%, daily≤95%.
Amplitude: Earthquake degree 8.
Application occasions should free from fire, inflammables, explosives, corrosives and severe vibration.

Technical parameter

No.	Item	Unit	Parameter
No.	Item	Unit	FN12-12D/630-20	FN12-12D.R/100-31.5
1	Rated voltage	kV	12
2	Rated frequency	Hz	50
3	Rated 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	20(4S)
7	Rated machine-stability current	kA	50
8	Rated closing current (peak)	kA	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	time	>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(2S)	20(2S)
17	Earth switch heat-stability current (peak)	kA	50	50
18	Motor operating power voltage	V	AC220,DC48