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Matching and determination of the split and closing of plum blossom contact-bistable permanent magnet mechanism vacuum circuit breaker
2019-08-30At present, the permanent magnet mechanism (bistable) moving iron core stroke produced at home and abroad (that is, the air gap between the moving iron core and the yoke) is relatively small (usually not more than 25mm), much smaller than conventional electromagnetic, spring, hydraulic and air pressure. Operate the organization’s ...READ MORE
Selection of electrical conductors and layout of power distribution equipment
2019-08-30Selection of electrical conductors and layout of power distribution equipment Conductor selection 1) The type of conductor should be selected according to the laying method and environmental conditions. In addition to meeting the above conditions, the insulated conductor should meet the requirements of the operating voltage. 2) Select the conductor ...READ MORE
What are the rules for the selection of neutral conductors and protective conductors?
2019-08-301. The neutral conductor should have the same cross section as the phase conductor when: 1) Single-phase two-wire circuit of any cross section; 2) In three-phase four-wire and single-phase three-wire circuits, the phase conductor cross section is not more than 16mm2 (copper) or 25mm2 (aluminum) 2. In the three-phase four-wire ...READ MORE
Causes and solutions for the heating of the contact of the high-voltage switchgear
2019-08-30In the high-voltage switchgear, the contact heating case has appeared in the past two years, and the contact heating has occurred. For example, the Dahua 10KV station incoming line cabinet hand truck plum blossom contact burned, the ammonium phosphate two feedback line cabinet contact burned, The 35KV station also found ...READ MORE