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Power Distribution Net with Hv Switchgear-Yfzrn21-12D/T125-31.5

Basic Info

Model No.:  YFZRN21-12D/T125-31.5

Product Description

Model NO.: YFZRN21-12D/T125-31.5 Usage: Breaking&Making Load Current Number of Switch: Multi Control Switch Environment: Indoor High Voltage Application: Indoor Power Distribution Trademark: YF Function: Industry Pole: 3 Certification: SGS, ISO9001, CE Test Equipment: IEC Standard Protection: Circuit-Break Failure Protection Origin: Jiangyin Yunfeng, China Product Overview
YFZN21(FZN21)-12 indoor AC HV load switch and load switch-fuse combination unit is applied in the indoor power distribution net with the rated voltage of 12kV and frequency of 50Hz for breaking and making  the load current. It has advantages of compact structure, long electrical endurance, availability for frequent operation, basically no maintenance, strong breaking and making capacity, safety, reliability and obvious isolating fracture, ect. Its performance meets requirements of GB 3804-2004 High-voltage alternating-current switches for rated voltage above 3.6kV and less than 40.5kV and GB 16926-2009 High-voltage alternating current switch-fuse combinations.

Model Specification
Power Distribution Net with Hv Switchgear-Yfzrn21-12D/T125-31.5

Power Distribution Net with Hv Switchgear-Yfzrn21-12D/T125-31.5

         ---compact structure
         ---long electrical endurance
         ---availability for frequent operation
         ---basically no maintenance
         ---strong breaking and making capacity
         ---safety, reliability and obvious isloating fracture

Service Conditions
          2.Ambient temperature-25ºC-+ 40ºC;
          3.The daily average of relative humidity shall not be larger than 95% and the monthly average shall not be               larger than 90%:
          4.The ambient air shall not be subject to the obvious pollution such as corrosive or combustible gas and                   steam;
          5.The site without fire hazards and explosion hazards;
          6.The site that the seismic intensity does not exceed degree 8; the gradient shall not exceed 5°

Power Distribution Net with Hv Switchgear-Yfzrn21-12D/T125-31.5              Power Distribution Net with Hv Switchgear-Yfzrn21-12D/T125-31.5

Main Technical Paramenters
Serial No. Item Unit YFZRN21-12 Load Switch-Fuse Combination Unit
1 Rated voltage kV 12
2 Rated frequency Hz 50
3 Rated current A Max.rated current of fuse 125A;
4 Rated short-circuit breaking current of fuse kA 31.5;
5 Rated breaking-transfer(handover)current A 2000
6 Rated active load breaking current A 630
7 5% rated active load breaking current A 31.5
8 Rated closed loop breaking current A 630
9 Rated cable charging breaking current A 10
10 Rated line charging breaking current A 1
11 Rated earthing fault breaking current A 30
12 Rated cable charging breaking current under earthing fault conditions A 17.4
13 Rated short-time withstand current(thermal          ---Load switch(including disconnector) kA/s 20/4
stability current)                                                    ---Earthing switch kA/s 20/2
14 Rated short-circuit making current kA 50
15 Rated peak withstand current(dynamic current) kA 50
16 1 min power-frequency withstand voltage(effective value)to earth,phase-to-phase,vacuum fracture/isolating fracture kV/kV 42/48
17 Full-wave lightning impluse withstand voltage(peak) to earth,phase-to-phase,vacuum fracture/isolating fracture kV/kV 75/85
18 Main loop resistance μΩ ≤120
19 Mechanical life Time 10000
20 Clearance between open contacts mm 9±1
21 Overtravel(compression length of contact spring) mm  
22 Gross thickness of contact wear mm 3
23 Average opening speed m/s 0.8~1.2
24 Average closing speed m/s 0.45~0.85
25 Rated contact pressure N 900±200
26 Connact closing bounce time ms ≤2
27 Three-phase opening and closing asynchronization ms ≤1
28 Inter-pole center distance mm 210±3
29 Distance between live parts and of phase to earth mm ≥125
30 Closing operation torque of vacuum arc-extinguishing chamber N.m ≤80
31 Opening operation force of vacuum arc-extinguishing chamber N ≤10
32 Rated closing operation voltage V ≌220/110
33 Rated opening operation voltage V ≌220/110
34 Time of switch opening triggered by breaking of fuse ms 35±5
35 Impact output energy at breaking of fuse J(Joule) 1
Note: The sensor with live display can be used for the switch insulator

Selection of HV current-limiting fuse
Transformer capacity(kVA) 100 125 160 200 250 300/315 400 500 630 750/850 1000 1250 1600 2000 2500
Rated current of fuse(A) 16 16 16 20 25 31.5 40 50 63 80 80 100 125 160 200

The model of recommended fuse is XRNT-12HV current-limiting fuse;
The impact output energy of recommended fuse is:1J(Joule) middle-sized.
Power Distribution Net with Hv Switchgear-Yfzrn21-12D/T125-31.5
Power Distribution Net with Hv Switchgear-Yfzrn21-12D/T125-31.5


Contact us if you need more details on High-Voltage. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Load Break Switch、Switchgear. If these products fail to match your need, please contact us and we would like to provide relevant information.

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