KBZ-400 feed switch, 200 feed switch, 630/1140 (660) series mine explosion-proof vacuum feed switch

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bfeed switch vacuum feed switch feed switch, feed switch, /() series mine explosion-proof vacuum feed switch
( (hereinafter referred to as the feed switch) is mainly used in coal mines as the main switch and branch switch of the power supply system in lines with AC, voltage and rated current respectively, or as a feed switch for mine explosion-proof mobile substations (after opening The cover plate is connected to the mobile substation) and can also be used for infrequent starting of large-capacity motors. It has the functions of overload, short circuit, undervoltage, leakage protection (selective leakage protection) and leakage lockout.
This series of switches is divided into two types: conventional type and intelligent type::r
Conventional type feed switch adopts analog function plug-in with various protection functions mentioned above. Leakage protection and leakage locking adopt the principle of DC addition method.
The intelligent power feed switch adopts an intelligent comprehensive protection device to add a selective leakage protection function (using the zero-sequence current direction principle) and is equipped with a Chinese character LCD display.
Product Features
This type of feed switch can be used as the main switch or branch switch of the power supply system or as a feed switch for mine explosion-proof mobile substations. It can also be used as an infrequent starter for large-capacity motors;
Strong breaking ability and fast analysis speed. The ultimate breaking capacity reaches.Breaking time&;.(from receiving the leakage action signal to the completion of breaking);
The electrical principle is simple, the protection function and display function are complete.
Main functions:
Conventional feed switch
Protection functions: under-voltage protection, circuit breaker protection, overload protection, leakage protection, leakage lockout, etc.;
Display function: using large Power LEDs intuitively display closing, opening and various fault states;
The switch equipment has a test switch to check the control circuit and protection circuit;
Leakage protection and leakage locking adopt the principle of DC addition method The leakage detection circuit is reliable.
Intelligent feed switch
Protection functions: overload, short circuit, undervoltage, overvoltage, three-phase unbalance (including phase failure), selective leakage protection of branch switches
and Leakage locking, main switch leakage protection and leakage locking functions;
Display function: Use high-power light-emitting diodes to visually display closing, opening and locking status, and equipped with Chinese character LCD display to display system voltage and three-phase current in real time , opening and closing status and insulation resistance value, and has a fault memory function;
Selective leakage protection adopts the zero-sequence current direction principle. When used as a branch switch, if leakage occurs in the branch, the branch switch protection will trip and other Neither the branch switch nor the main switch will trip; Note: When used as a sub-switch, this switch can be used with both conventional and intelligent main switches;
The switch equipment has leakage test and overcurrent test buttons The feed switch protection function can be detected at any time.
The above is the detailed information of the feed switch provided by Zhejiang Pudong Mining Equipment Co., Ltd. If you have any questions about the information of the feed switch, please contact the company for further information on the feed switch.
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