Automatic Water Supply of a Water Pump Controlled by an Electric Contact Pressure Gauge

YouTube：https://youtube.com/shorts/RBzYUQf7wPE

Wiring Diagram and Working Principle Explanation of the :

### Wiring Diagram of the Control Circuit

### Working Principle
1. **Power Supply Connection**: Connect the three - phase power supply to the circuit breaker QF to provide power for the entire circuit. The circuit breaker plays a role in overload and short - circuit protection.
2. **Wiring of the Electric Contact Pressure Gauge**: The electric contact pressure gauge has three wires, one common wire, one wire connected to the lower - limit contact, and one wire connected to the upper - limit contact. The common wire is usually connected to one phase of the power supply (such as L1). The lower - limit contact is connected to one end of the coil of the intermediate relay K1 through the normally - closed contact of K1; the upper - limit contact is connected to one end of the coil of the intermediate relay K1 through the auxiliary normally - open contact of the contactor K. The other ends of the coils of the intermediate relay K1 and the contactor K are both connected to another phase of the power supply (such as N).
3. **Connection between the Contactor and the Water Pump**: The main contacts of the contactor K are connected to the three - phase power input terminals of the water pump motor to control the power - on and power - off of the water pump. When the main contacts of the contactor K close, the water pump motor is powered on and starts to supply water; when the main contacts open, the water pump motor is powered off and stops supplying water.
4. **Working Process**
- **Starting Process**: When the water pressure drops below the set lower - limit value, the middle contact of the electric contact pressure gauge connects with the lower - limit contact. At this time, the current passes through the common wire, the lower - limit contact, and the normally - closed contact of K1 to reach the coil of the contactor K, causing the coil of the contactor K to be energized and attracted. The main contacts of the contactor K close, supplying power to the water pump, and the water pump starts to operate and supply water. At the same time, the auxiliary normally - open contact of the contactor K also closes, forming a self - holding circuit. Even if the water pressure rises subsequently and the middle contact of the electric contact pressure gauge disconnects from the lower - limit contact, the contactor K can still maintain the attracted state, and the water pump continues to operate.
- **Stopping Process**: As the water pump supplies water, the water pressure gradually rises. When the water pressure rises to the set upper - limit value, the middle contact of the electric contact pressure gauge connects with the upper - limit contact. The current passes through the common wire, the upper - limit contact, and the auxiliary normally - open contact of the contactor K to reach the coil of the intermediate relay K1, causing the coil of K1 to be energized and attracted. The auxiliary normally - closed contact of K1 opens, cutting off the coil circuit of the contactor K. The coil of the contactor K loses power, the main contacts open, and the water pump stops supplying water.
#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