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Home > Products > 12kV Indoor HV Load Switch > Fn7-12r (T) D Hv Load Switch-Fuse Combination Unit

Fn7-12r (T) D Hv Load Switch-Fuse Combination Unit

Basic Info

Model No.:  FN7-12R(T)D

Product Description

Model NO.: FN7-12R(T)D Structure: Three-Phase AC Power System Pole: 3 Certification: SGS, ISO9001, CE Application: Making Short-Circuit Current Origin: Jiangyin Yunfeng, China Function: Industry Usage: Breaking Load Current Number of Switch: Multi Control Switch Type: Gas-Production High Voltage Trademark: YF Product Overview
YFN7(FN7)-12 series indoor AC HV load switch is a gas-production HV load switch and fuse combination unit with arc quenching principle.It is applied in three-phase AC 50Hz power system with rated voltage 12kV for breaking the load current and making the short-circuit current.The fuse combination unit can break the short-circuit current and has the function of single-phase fuse three-phase tripping and breaking.It is the ideal selection for protecting the line, equipment and transformer. Its performance meets the requirements of national standards 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
Fn7-12r (T) D Hv Load Switch-Fuse Combination Unit
Note: The sensor with live display can be used for the Switch Insulator

          ---small size
          ---light weight
          ---simple & reasonable structure
          ---small operating force
          ---reliable performance & convenient maintenance

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°

Main Technical Parameters
Serial No. Item Unit YFN7-12R(T)HV Load Switch-Fuse Combination Unit
1 Rated voltage kV 12
2 Rated frequency HZ 50
3 Rated current A Max.rated current of fuse equipped:125A
4 Rated short-circuit breaking current of fuse kA 31.5
5 Rated breaking transfer current A 1000
6 Main loop resistance μΩ ≤120
7 Rated active load breaking current A 630
8 Rated short-time withstand current(thermal stability current)/duration kA/s 20/4
9 Rated short-time withstand current(thermal stability current)/duration of Earthing Switch  kA/s 16/2
10 Rated peak withstand current(dynamic current) kA 50
11 1 min power-frequency withstand voltage(effective value)to earth,phase-to-phase/isolating fracture kV/kV 42/48
12 Full-wave lightning impluse withstand voltage(peak) to earth,phase-to-phase/isolating fracture kV/kV 75/85
13 Mechanical life Time 2000
14 Rated opening operation voltage V ≌220/110
15 Time of switch opening triggered by breaking of fuse ms 35±5


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Product Categories : 12kV Indoor HV Load Switch

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