The 1000V DC Contactor manufacturer tells you that in order to fully understand its use and the operating parameters of the control circuit, as an example, understand the control power, operating voltage, current, operating frequency, operating system, operating circuit parameters and environmental conditions. And determine the contactor model and specification suitable for its purpose from various DC contactors, let's learn about the choice of 1000V DC Contactor!

The main purpose of 1000V DC Contactor is divided into two parts: controlling motor and electromagnet.
Option for 1000V DC Contactor
Use 1000V DC Contactor to control the unidirectional operation of the DC motor. After pressing the start button SB1, the operating coil KM of the contactor is energized, the main contact KM is closed, and the auxiliary normally open contact KM is closed, and the motor m is automatically protected. After the stop button SB2 is pressed, the coil KM is powered off and the motor m stops. .
The 1000V DC Contactor controls the forward and reverse rotation of the DC motor. After pressing the forward rotation button SB1, the main contact KM1 of the forward rotation contactor is closed, the upper end of the motor m is connected with "", and the lower end is connected with "-", the motor rotates forward; press the stop button SB3, the main contact KM1 is disconnected , The motor stops; press the reversing button SB2 again, the main contact KM2 of the reversing contactor is closed, the upper end of the motor m is connected with "-", the lower end is connected with "", and the motor rotates in the opposite direction. The normally closed auxiliary contacts KM2 and KM1 act as an electrical interlock to prevent the two contactors KM1 and KM2 rotating forward and backward from being closed at the same time, causing the power supply short-circuit accident. In addition to electrical interlocking, mechanical interlocking is generally used in combination for safety. However, even if the mechanical and electrical double interlock is entered, in the sudden reverse control (first press SB3, then press SB2), if the arc burning time of the forward rotation contactor KM1 is too long, it will be before the arc disappears. Reversing contactor KM2 Therefore, when selecting a DC contactor that controls the forward and reverse rotation of the motor, it is necessary to consult relevant technical data for analysis and management. When there is a risk of power short circuit, it is strictly prohibited to reverse the control suddenly. It is necessary to add an intermediate relay and a delay relay to the reverse rotation control circuit.
The 1000V DC Contactor manufacturer tells you that when selecting the type, you must first clarify the main technical parameters of the motor in actual operation. The rated voltage, rated current or rated control power of the contactor shall not be lower than the appropriate value of the motor. When used for repetitive short-time operation or short-time operation, the rated heating current of 1000V DC Contactor must be above the effective current of the actual motor operation, and the rated operating frequency of the contactor must also be below the actual operating frequency of the motor. After understanding the use category of the motor, you need to select the contactor series with the technical data of the use category.
When using a rectifier device, especially a thyristor rectifier device to control a DC motor, if you choose a CZ0 DC contactor whose control power supply voltage is AC operation, you can simplify the control line and reduce the cost of the DC control power supply (including transformers, rectifiers, etc.). The 1000V DC Contactor manufacturer tells you that when using a DC contactor for traction motor control, you must choose a DC contactor that is resistant to shock, shaking, and shaking, and set the inclination to meet the technical requirements of the traction motor. The DC contactor of the hydraulic drive motor that controls the loading and unloading of loads in forklifts and forklifts is forward, reverse and micro-moving, and the operating frequency is high. Generally, choose a DC contactor with an arc extinguishing chamber or a 1000V DC Contactor with a high rated current level.
The above introduction is the selection of 1000V DC Contactor, if you need to know more, please feel free to contact us!