How to wire the start-stop protector of a water pump?

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There are generally various types of start - stop protectors for water pumps. The following takes the common electronic start - stop protector for water pumps as an example to introduce its general wiring method:

1. **Main circuit wiring**
- **Power input wiring**: Connect the three wires (L1, L2, L3) of the three - phase power supply to the power input terminals of the start - stop protector respectively. These terminals are usually labeled as L1, L2, L3 or R, S, T. Ensure that the wiring is firm to avoid heating or poor contact caused by looseness.
- **Motor output wiring**: Lead out three wires from the output terminals of the start - stop protector (usually labeled as U, V, W) and connect them to the three wiring terminals of the water pump motor respectively. When wiring, pay attention to following the nameplate markings of the motor to ensure the correct phase sequence and prevent the motor from reversing. If the motor reverses, you can swap any two power supply wires.

2. **Control circuit wiring**
- **Start button wiring**: Connect one end of the start button to the start - signal input terminal of the start - stop protector, which is generally labeled as SB1 or START. The other end of the start button is connected to one end of the power supply, usually the neutral wire (N) or the corresponding end of the power supply for the protector's operation.
- **Stop button wiring**: Connect one end of the stop button to the stop - signal input terminal of the start - stop protector, generally labeled as SB2 or STOP. The other end of the stop button is connected to the same end of the power supply as the start button is connected to, that is, the neutral wire (N) or the corresponding power supply end. When the stop button is pressed, it can cut off the control circuit and stop the water pump.
- **Protection signal wiring**: The start - stop protector usually has multiple protection functions, such as overload protection, under - voltage protection, leakage protection, etc. The signal input terminals of these protection functions need to be wired according to the specific protection types. For example, for overload protection, the motor current signal is generally collected through a current transformer, and the secondary - side output signal of the current transformer is connected to the overload - protection input terminal of the start - stop protector; for leakage protection, the output signal of the leakage detection device needs to be connected to the leakage - protection input terminal of the start - stop protector. When an abnormal situation occurs, the protection device will be triggered, cutting off the control circuit to protect the water pump motor.
- **Auxiliary contact wiring**: The start - stop protector generally also has auxiliary contacts, which are used to indicate the operating status of the water pump or to perform interlocking control with other devices. The normally open auxiliary contact (generally labeled as NO) closes when the water pump is running, and the normally closed auxiliary contact (generally labeled as NC) opens when the water pump is running. You can connect the auxiliary contacts to indicators, alarms, or other control devices according to actual needs to achieve corresponding functions.

Before wiring, be sure to cut off the power supply to ensure safe operation. There may be slight differences in the wiring methods of start - stop protectors of different brands and models. The specific wiring should be carried out strictly in accordance with the product manual.#tiktokrefugee#cat#tiktokban#china#抖音难民#transformers #transformer #electrical #technology #factory #foryou #viral #shortvideo #manufacture #machine #power #shorts #trending #wiring #factorywork #electricalengineering #powertransformer #electriacaltransformer #manufacturing #process #manufacturer #manufacturingprocess #HighVoltageWinding #usa #canada #australia #uk#dailyvlog #daily #bluecollar #Tesla#WorkshopDaily #electricwire #powerengineering #transformer #foilwinding #lowvoltagenation #electricalengineering #LowVoltageFoilWinding #FoilWinding #ElectricalEngineering #TransformerDesign #InductorDesign#TransformerTechnology #ElectricalEngineering #FoilWinding #TransformerManufacturing #EnergyEfficiency #ElectricalDesign #TransformerWinding #EngineeringInnovation #TransformerTechnology #CopperFoilWinding #PowerTransformers #EngineeringTechniques #ElectricalComponents