Induction melting furnace electrical system and installation and commissioning of inductors and yokes

    Main power supply line of the furnace, transformer, capacitor, reactor, various switch cabinets and control cabinets, main bus, power

The installation of the line and control lines shall be carried out in accordance with the relevant regulations of the national industrial enterprise electrical design and installation, with special attention.

The following are the following:

    (1) Terminal numbers should be marked on both ends of all control lines between electrical equipment for easy inspection and maintenance. After the wiring is completed, it is necessary to carefully check and test the electrical action so that the operation of all electrical and interlocking devices is accurate.

    (2) Before the sensor passes through the water, the insulation resistance of the inductor should be detected and the L withstand voltage test. If the sensor has been vented, the test should be carried out after the water has been blown dry with compressed air. Shengzhuang should be able to withstand an insulation withstand voltage test of 2u-+1000 volts (but not less than 2000 volts) for 1 minute without flicker and breakdown. In the high voltage test, the voltage starts from the 1/2 specified value and increases to the maximum value within 10 seconds.

    The insulation resistance between different induction coils and between the induction coil and the ground in the inductor must meet the following requirements: rated electricity

For pressures below 1000 volts, with a 1000 volt shaker, the insulation resistance value is not less than 1 megohm; the rated voltage is above 1000 volts.

For example, with a 2500 volt shaker, the insulation resistance value is not less than 1000 ohms/volt. If the insulation resistance value is found to be low, the sensor should be handled.

The drying treatment can be carried out by means of a heater placed in a furnace or by blowing hot air. But at this time, care should be taken to prevent insulation.

Harmful local overheating.

    (3) Each core bolt of the yoke should have good insulation to the silicon steel sheet and the ground. It is measured with a 1000 volt shaker, and its insulation resistance value is not low.