Mining explosion-proof magnetic starter for AC 50HZ, voltage 380V, 660V, 1140V circuit for direct or remote control of three-phase squirrel cage asynchronous motor, consisting of body (movement) and flameproof enclosure, available In mines with gas and coal dust explosion hazards. The top of the magnetic starter in the laneway must not be subject to water-spray, and should be stored in an environment where the air circulation is not higher than +40°C and not lower than -5°C, and the humidity is not more than 95% and no corrosive gas is present. The magnetic starter must be placed in a place where there is no strong jolting vibration and where the vertical tilt does not exceed 15 degrees.
I. General provisions:
1, the operator must be a professional electrician after passing the professional training, the certificate holder.
2. When the operator operates the switch and stops sending power, it must hang the “power-off†indicator board and lock the two locks.
3. The operator must be familiar with the performance and principle of the switch.
Second, the preparation work:
1. Before the magnetic starter is operated, the operator must check the support of the roadway near the switch to ensure that the support is intact.
2. Before the magnetic starter is powered on, check whether the two anti-lock and mechanical locks of the switch are opened (whether the lock lever is withdrawn) and whether the connection of the power line and the load line is correct.
Third, equipment operation:
1. During operation, the electrician hits the switch handle to the “closed†position. After the start button is pressed, the operator starts to operate the double press to operate the device.
2. When operating on the switch body, it is necessary to advance the near-control button of the body in the position of the close-up control. The operation can be directly operated on the switch to open or stop the device; if remote control is required, the operator will The button is pressed at the remote control position, and the operator operates the device remotely by double or triple pressing.
3. When stopping the operation of the equipment, first hit the handle in the stop position, so that the lock lever will lock the handle and lock the two locks.
Fourth, operation precautions:
1. It is forbidden to carry out maintenance and relocation of equipment.
2. When the switch is inspected, the power must be turned off to lock the upper switch and the current switch and hang the power failure indicator.
3. When the switch is inspected, the power switch must be turned off. When the gas concentration does not exceed 1%, the test is performed after the electroscope that meets the voltage level, and after confirmation, the switch can be overhauled.
4. Non-professional electrical personnel are strictly prohibited from operating electrical equipment without authorization. 5. Perform a leakage test on the equipment every day.
Fifth, use and maintenance:
1. The professional electrician is responsible for the maintenance and maintenance of the magnetic starter, and the color change of the moisture-proof agent must be promptly replaced.
2, maintenance personnel regularly check the contactor inside the switch, the contacts and the transformer, the perfect condition of the terminal, incomplete drug replacement.
3, when the magnetic starter is not in use, the well should be overhauled in time.
4, before the magnetic starter down the well to send someone in the ground to check the test before going down.
5. The magnetic starter should be installed with reliable grounding.
6. The current setting of the protector shall be made by a full-time staff based on the actual operating current.
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