How should the negative pressure fan be wired?

The negative pressure fan needs electricity when ventilating, and the rotation of the motor can drive the fan blades to generate ventilation, so that the hot air in the room can quickly extract the negative pressure outside. If the equipment circuit is not connected correctly, it will cause circuit leakage, motor burnout and other losses. The editor will take you to understand the wiring process of the negative pressure fan.

1. Determine the parameters of the negative pressure fan motor: look at the motor voltage, motor power, motor current and motor fan symbols listed.

2. Determine the main source of the incoming main power of the motor: if the voltage of the negative pressure fan is 220 volts, a common socket with a switch can be directly installed near the installation location of the fan. If the fan has three motors, you need to make a special call from the negative pressure fan from the main wire of the electrical box and connect the main power wire to the device control switch. Its main power supply should not be connected with other high-power machine lines, so as to prevent the machine equipment from burning down or suddenly stop working due to failure, and to avoid adding other lines.

3. Install the negative pressure fan power control switch: If the equipment is a 3890 volt motor, the commonly used control switches include leakage control switches and leakage protection control switches. The installation position of the control switch is determined according to the actual situation on site. Pay attention to the installation position of the switch for easy operation, and keep away from high temperature environment if conditions permit.

4. Wind the power cord around the motor wiring control switch with an insulating flexible conduit: connect the negative pressure fan to the motor of the control switch, and then connect it firmly according to the connection position of the control switch. If the motor wire is not long enough, the switch can only be connected after the secondary connection, the connected joint part should be insulated and wrapped, pay attention to the quality and load of the secondary connection wire and cable.

5. Check the circuit and power-on debugging: After power-on is completed, before power-on debugging, the inspection circuit should be tested first, mainly to check whether the incoming line voltage and current are normal and whether the line is dangerous.