High speed ground switch JNH1-24/27 Series
This ground switch product is a new type of earthing switch designed and developed by our company. Its integrated structure contains our patented fix contact which could induce smooth action of moving blade during closing.
It’s designed for indoor 24kV 50/60Hz electric power system. The structure is a simplified and compacted design with light weight, and it is easy for installation and reliable in performance, it is an ideal upgradation for JN4-24 earthing switch.
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Rated
Voltage (kV)
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Thermal
Steady Current (kA)
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Thermal
Steady Time(s)
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Dynamic
Steady Current (kA)
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Short
Circuit Making Current（KA）
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Phase
Distance（mm）
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24/27
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25
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4
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65
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65
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220-275
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24/27
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31.5
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4
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82
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82
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220-275
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Environmental conditions
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Ambient air temperature
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+60℃ to -30℃，daily temperature difference: 30℃.（Actually upon the temperature of insulators）
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Relative humidity
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<90% (daily mean)
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Seismic intensity
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No higher than 8
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Altitude
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No higher than 1000m (if the product is to be used in plateau, please make a note in the order).
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Places without fire or explosion hazards, or heavy dust, chemical corrosion or violent vibration.
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Operating Interlock Machanism
Production Capacity
1.Annual Capacity: 30000 earthing switches
2.Over 30 machines,like CNC lathe, CNC milling machine, CNC bending, Automatic welding machine, Punching, Shearing machine etc
3.All kinds of Inspection Equipments:
switch mechanical characteristics tester, rockwell hardness tester, automatic spring tension and compression tester, circuit resistance tester, eddy current conductance tester, multifunctional electrolytic thickness tester, salt spray test and others
Professional research and development, strict inspection, perfect after-sales service.
Patent
Workshop
Partner
Jiangshan Electrical Technology Development Co., Ltd.,Founded in 1994,focus on grounding switch,Isolation switch,Transmission gear R&D and production.Science & Technology Enterprise of Zhejiang Province,13 Patents for Utility Models,2 Patents for Invention and 2 Patents in USA.Accumulated lots of experience in R&D and Quality Control which earned us a good reputation within the market. Professional research and development, strict inspection, perfect after-sales service.
