The start and stop buttons of the water-cooled electric control cabinet of the electric melting furnace require an indicator light, the running state is green, and the stop state is red. The voltmeter is equipped with a transfer switch, which displays three blocks of voltage, current and current of AB, BC and AC items:
1. The electric melting furnace water-cooled electric control cabinet displays the total power supply A, B, and C currents.
1# cooling unit machine control type is dry contact conversion switch control output point is dry contact, joint control is controlled by cold water tank temperature. And monitor the state of the cutting machine, the mixer, the molding machine pump, as long as any of the pumps are running, the unit must also start. The unit has a start control loop. The power supply is led to the terminal in the electric control cabinet. Dry contact start and stop signals are required, and the start is closed. Disconnected to stop.
The interlocking control of the 1# unit circulating water pump is controlled by the temperature of the cold water tank and is controlled by the external dry contact. The pump stops working when both conditions are met at the same time. Start when any of the conditions meets the start. The machine feed pump, the mixer water pump, and the molding machine water pump are cut out. The interlock control is dry contact control, which is turned on and off. Lead to the terminal strip.
2# Cooling unit control type is dry contact Transfer switch The machine control output point is dry contact, and the automatic control is controlled by the refrigerant tank temperature. And monitor the state of the refrigerant circulating water pump, and the refrigerant pump running unit should also be started. The unit has a start control loop. Simply provide dry contact start and stop signals, and close the start. Disconnected to stop.
The interlock control of the 2# unit circulating water pump is controlled by the temperature of the refrigerant tank and is controlled by external dry contact. When both conditions are met, the pump stops working. Start when any condition meets the beginning. The metering water pump interlock control is dry contact control, which opens, closes and stops. Leads to the terminal block. Monitor the water level of the tank. When the water level is low to the lower limit, the metering pump can only be started again. Touch this limit until the water level in the tank rises to a certain height. And the water tank reaches the lower limit state output. The water circulation pump interlock control is controlled by the water tank temperature, and the refrigeration circulation pump control: the refrigeration circulation pump is started 10 seconds after the water circulation pump is started. The water circulation pump stops the refrigerant circulation pump and stops.
The temperature sensor is installed in the three water tanks. When the temperature in the water tank reaches the upper limit, the upper limit is the upper limit. The lower limit is required. There is an alarm output, and the sound and light alarm and dry contact to the control panel are output to the terminal. Each pump must have a dry contact running status output. The control system has a cooling and heating output function. There is a cooling and heating transfer switch on the control cabinet panel, and the control system automatically adjusts the upper and lower limits of the temperature inside the water tank according to the switch state.
