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  • FKRN12-12D 4
  • FKRN12-12D 1
  • FKRN12-12D 2
  • FKRN12-12D 3
FKRN12-12D 4
FKRN12-12D 1
FKRN12-12D 2
FKRN12-12D 3

Indoor HV Pressure Pneumatic Load Break Switch And Fuse Combination Apparatus

Sku Number: 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.

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    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

 

Pneumatic Load Break Switch And Fuse Combination Apparatus drawing

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