Who can send me the circuit diagram of sewage pump and automatic control box of two motors?

Sewage pump control box, sewage pump control box, sewage pump control box wiring diagram, sewage pump control box wiring diagram

The control box of sewage pump usually adopts the principle of liquid level control. The control cabinet of liquid level sewage pump usually adopts the functions of high-performance float switch and control cabinet, which starts the sewage pump when the liquid level is high and stops when the liquid level is low.

A, sewage pump control box principle is as follows:

1, the principle that the sewage pump control box controls the outlet liquid level of the sewage pump.

The working state of water supply is to control the water quantity of sump at the outlet end of sewage pump. We call it liquid level control of water supply working state. In the wiring of the sewage pump control box, only two leads of the normally closed contact of the float switch need to be connected to Y 1 and Y2 respectively.

This connection mode is that when the outlet section of the sewage pump is full of water, the float can float to the set white ball position, the normally closed contact is automatically disconnected, and the sewage pump stops working.

When the liquid level drops to the start position and the normally closed contact of the float switch is turned on, the sewage pump starts to work. See Figure 8 for the schematic diagram of sewage pump control box. The above is the principle that the sewage pump control box controls the liquid level at the outlet end of the sewage pump.

Principle of the second sewage pump control box to control the liquid level of sewage pump pool

Connect the two signal wires of the normally open contact of the floating ball to the Y 1 and Y2 terminals of the sewage pump control box. When the liquid level reaches the predetermined full water position, the floating ball naturally rises with the water.

When the position of starting the pump is reached (as shown by the black ball in Figure 9), the normally open contact is connected and the sewage pump starts to work. When the water level drops to the predetermined water stop pipeline (as shown in Figure 9), the normally open contact of the floating ball is disconnected and the sewage pump stops running. This is the principle that the sewage pump control box controls the water level in the sewage pump pool.

Schematic diagram of sewage pump control box is as follows

2. Wiring diagram of sewage pump control box and wiring diagram of sewage pump control box

(1) 1 wiring diagram of sewage pump control box and 1 wiring diagram of sewage pump control box.

(2) Wiring diagram of control box with one in use, one standby and one control.

Extended data:

Causes and elimination of sewage pump failure;

1. After the sewage pump runs, there is no flow reason analysis and air plug removal method. Check the outlet drain valve. The pump is reversed. Open and close the valve frequently, and start and stop the pump several times, with an interval of 2-3 minutes. Check whether the pressure reducing valve is installed according to the installation method. Open the valve, check whether the installation direction of the valve is wrong, turn off the main power supply and replace the two power cables.

2, sewage pump flow or head drop reason analysis. The conveying head is too high. The pump medium is bypassed. The outlet pipe leaks. The outlet pipeline may be partially blocked by deposits. The pump is partially blocked. Impeller or base is worn. Turn off the main power supply of the control box and replace the two-phase power cord.

Check: whether the model selection is correct; Whether the outlet pipe size is correct. Check whether the valve is closed, and then test the pump under full load. Find the leak and fix it. Check the pipeline, clean or replace the pipeline. Check and clean the pump (including the pump used in the screen). Adjust the gap or replace parts.

3. Cause analysis of frequent start and stop of sewage pump The selection distance of floating control switch is too short. If the check valve fails, the check valve will not flow back, causing the liquid to flow back to the sewage pool. A, readjust the floating switch to prolong the operation time. B, check and repair the valve.

4. Cause analysis of sewage pump failure The function of floating control switch is abnormal. Float stuck in working position. Check and replace if necessary. Loosen and adjust the position as needed.

5. After the sewage pump is started, the circuit breaker and overload device trip. The voltage is too low. The voltage is too high. Motor wiring error. The sediment is deposited at the bottom of the volute.

Check the voltage, if the voltage is too low, it can't be used; If the cable is too long, resulting in excessive pressure drop, try to shorten the cable as much as possible and choose a thicker cable appropriately. Use a transformer to adjust the voltage to the normal range. Check the cable color number and connector number in the control box and check the wiring. To clean the pump and oil pan, please refer to the relevant parts of the installation instructions.

6. The reason why the sewage pump can't start is that the maintenance method is not charged. There is an open circuit in the winding, cable, terminal or control box. Check whether the power supply of the control box is normal. Check cables, motor connectors and windings.

7, sewage pump can't start, fuse or circuit breaker trip. The fault of floating ball can be eliminated through analysis. Winding, connector or cable is short-circuited. The pump is blocked. Check whether the bypass float switch can start the pump, and if so, check the float switch. Check with an ohmmeter. If there is a short circuit, check the windings, terminals and cables. Cut off the power supply, take the pump out of the sewage pool, remove obstacles and try to reset.

References:

Baidu encyclopedia-sewage pump water supply controller