Vacuum load switch

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FZN□12 indoor high voltage vacuum load switch

FZN□12 indoor high voltage vacuum load switch FZN□12 indoor high voltage vacuum load switch

FZN□12 indoor high voltage vacuum load switch

  • Category:Vacuum load switch
  • Model and Definition Technical parameters and performance Table 1 Technical parameters of load switch serial number Name name unit data load switch Combination appliances 1 rated voltage rated voltage KV 12 2 Rated insulation level P
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Product Description

Model and Definition

Technical parameters and performance

Table 1 Technical parameters of load switch

serial number Name name unit data
load switch Combination appliances
1 rated voltage rated voltage KV 12
2 Rated insulation level Power frequency withstand voltage phase-to-phase, ground/isolation fracture KV 42/48
Mine impact withstand voltage relative, ground/isolation fracture KV 75/85
3 Rated current A 630/800 125
4 Rated active load breaking current, rated closed-loop breaking current A 630/800 125
5 Withstand current at rated time (2S) KA 20
6 Rated short-circuit making current, rated peak withstand voltage current KV 50
7 Rated cable charging breaking current A 25
8 Rated breaking no-load transformer KVA 1600 1600
9 Rated breaking current A - 2000
10 Rated short-circuit breaking current of fuse KA - 31.5
11 Mechanical life Second-rate 2000 2000
12 full break time ms not more than 100
13 Overload breaking capacity A 5000

Table 2 Main mechanical characteristics of load switch

serial number Name name unit Numerical value Remark
1 Phase center distance mm 210±3
2 Contact Spacing mm 10±3
3 contact stroke mm 3±1
4 Three-phase closing aperiodicity ms <2
5 Three-phase closing aperiodicity ms <2
6 Closing contact bounce time ms <2
7 Average closing speed m/s 0.6±0.2
8 Average opening speed m/s 1.0±0.2
9 The cumulative allowable wear thickness of the moving contacts mm 3
10 Spacing between moving and static contacts mm >160

Dimensions and installation dimensions

Vacuum load switch and its combination


Hole Size

Selection of fuses for 12KV/0.4KV transformer protection

name parameter
Transformer capacity (KVA) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600
Fuse rated current (A) 10 16 20 20 25 31.5 40 50 63 80 100 125 125

Schematic diagram of panel interlocking and opening