The numbers and letters on contactors

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The numbers and letters on contactors contain a wealth of information, as follows:

### Model Part
- **Numbers**: The numbers in the model usually represent some key parameters of the contactor, such as the rated current. For example, in "CJX2 - 1810", the "18" indicates that the rated operating current of the contactor is 18A. This is an important basis for selecting a contactor. It is necessary to determine a contactor with an appropriate rated current according to the magnitude of the load current to ensure that it can operate normally without being damaged due to overload.
- **Letters**: The letter part often reflects information such as the series and structure of the contactor. For example, in "CJX2", "CJ" represents an AC contactor, "X" may indicate miniaturization or a specific design code for this series, and "2" generally represents the product design serial number. Different series may vary in terms of appearance dimensions, installation methods, performance characteristics, etc.

### Coil Part
- **Voltage Marking**: The rated voltage is marked on the contactor coil. For example, if the coil is marked "AC220V", it means that the rated voltage of the coil of this contactor is 220V AC. This means that when an AC voltage of 220V is applied to the coil, the contactor can normally attract and operate. If the applied voltage does not meet this rated value, it may cause the contactor to malfunction. For example, if the voltage is too low, the contactor cannot attract, and if the voltage is too high, it may damage the coil.
- **Terminal Numbers**: There will be numerical designations near the coil terminals of the contactor, such as "A1" and "A2". These designations are used to correctly connect the power supply lines of the coil to ensure that the current can pass through the coil normally, enabling the contactor to generate electromagnetic force and achieve the operation of the main contacts and auxiliary contacts.

### Main Contact and Auxiliary Contact Part
- **Contact Capacity Marking**: There may be numbers next to the main contacts and auxiliary contacts to mark their capacity. For example, for the main contacts, their rated current and rated voltage will be marked, such as "690V/400A", which indicates that the maximum voltage that the main contacts can withstand is 690V, and the maximum rated current is 400A. The auxiliary contacts will also have similar capacity markings, but their capacity is usually smaller than that of the main contacts, and they are used for functions such as signal transmission in the control circuit.
- **Normally Open/Normally Closed Contact Marking**: The contactor will use numbers or letters to mark which are the normally open contacts (NO) and which are the normally closed contacts (NC). The normally open contacts are in the open state when the contactor is not energized and close when energized; the normally closed contacts are the opposite, closed when not energized and open when energized. These markings help to accurately use different contacts of the contactor in circuit connection to achieve the required control logic.#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