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Indoor HV Air Load Break Switch And Fuse Combination Apparatus

Model: FKRN12-12D

Description

FKN12-12D/630-20 series air-blast load break switch (hereinafter referred to as FKRN12- 12D) and FKRN12-12D series air-blast load break switch and 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 over head wiring.

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Feature

With impact structure, aesthetic appearance,reliable interlock and high insulting level, easy maintenance and operation as well as reliable performance.
Good performance

In the spring storage operation mechanism, CO 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 insulation 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.

Technical Parameter
Drawing

No.	Item	Unit	FKN12-12D/630	FKRN12-12D/T125
1	Rated voltage	kV	12
2	Rated power frequency	Hz	50
3	Rated current	A	630	100
4	Rated lightning impluse withstand voltage	kV	To ground and interphase, isolation break
5	Power frequency withstand voltage	kV	To ground and interphase, isolation break
6	Rated short-time withstand current	kA	20(4s)
7	Rated peak withstand current	kA	50
8	Rated close current(peak)	kA	50	50
9	Rated short circuit breaking current(expected value)	kA		31.5
10	Max.critical breaking current	A2S		Follow fuse characteristic curve
11	Min. breaking current	kA		Follow fuse characteristic curve
12	Rated transfer current	kA		1.5
13	Max. breaking current(reference value)	kA	1.8
14	Braking no-load transformer capcity	kva	1250
15	Rated cable charging current	A	10
16	Rated active load current breaking times	times	＞100
17	Switch-off time of rated active load current	s	20(2s)	＞0.06
18	Earthing switch thermal current	kA	50	20(2s)
19	Earthing switch steady current(peak)	kA		50
20	Motor operating power voltage	V	100, 220 AC, DC