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FKN12-27.5 D bipolar load switch and FKN12-27.5IRD bipolar combined electrical appliance are mainly used in the distribution facilities at the front end of 27.5KV transformer in railway traction network for load control and short-circuit protection. Because the combined wall can protect electrical equipment such as transformer more effectively than circuit breaker, it can be used for dry-type transformer high temperature trip protection, heavy gas trip protection, false electrification trip protection, etc.
Executive standards
GB311.1-2012 Insulation Coordination of High Voltage Transmission and Transformation Equipment
G83804-2004 3.6-40.5kV high-voltage AC load switch
GB/T 11022-2011 Public Technical Requirements for High Voltage Switchgear and Control Equipment Standards
DL/T593-2006 Common Technical Requirements for High-voltage Switchgear and Control Equipment Standards GB16926-2009 AC High-voltage Load Switch-Fuse Combinations
G8/T1985-2014 High Voltage AC Disconnectors and Earthing Switches
GB/T 15166-2008 AC High Voltage Fuses
Working Condition
Ambient air temperature shall not exceed+40 ℃ - 45 ℃, and the average maximum temperature within 24h shall be+35 ℃;
24h maximum average relative humidity ≤ 95%. Maximum average relative humidity in one month ≤ 90%;
Surrounding air is not obviously polluted by dust, smoke, corrosive and or flammable gas, steam or salt mist:
Altitude ≤ 1000m;
No frequent severe vibration:
Pollution resistance grade: II
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