Vacuum Contactor Switch
■ summary
CKG3 and CKG4 series AC high-voltage vacuum contactors (hereinafter referred to as contactors) are suitable for AC 50-60Hz, with rated main circuit Long distance connection and disconnection, frequent starting and Control communication Motor It is suitable to replace vacuum circuit breaker with fuse and various protective devices.
■ Environmental conditions for use
The ambient air temperature shall not be higher than+40 ℃ and not lower than - 10 ℃.
The altitude of the installation site shall not exceed 2000m.
The relative humidity of the air is 90% higher than the average relative humidity of the wet month, and the average lower temperature of the month is 25 ℃
Condensation on the surface of the product where the change occurs.
Where there is no obvious shaking and shock vibration.
In places with explosion hazards, there is no gas and dust (including conductive dust) that can corrode insulation.
A place free from rain and snow.
■ Structure and working principle
The series contactors are composed of insulated insulating frame, metal base, transmission crank arm, electromagnetic system, auxiliary switch And vacuum switch tube (See Figure 1). When the solenoid coil passes the control voltage, the armature drives the crank arm to rotate, making the main contact in the vacuum switch tube connected. After the solenoid coil is powered off Spring Function to break the main contact.
The vacuum switch tube is composed of upper cover, lower cover and metal corrugated pipe and ceramics The vacuum switch tube is made of 95 porcelain The corrugated porcelain pipe made of insulating material has the characteristics of large creepage distance, high mechanical strength, heat resistance and impact resistance. vacuum switch A pair of dynamic and static contacts are encapsulated in the tube, and the contact material is wear-resistant and low cutoff value Cu-W-Wc, which can meet the requirements of breaking performance In addition, the overvoltage caused by current cutoff during the breaking process is reduced, and the service life of the vacuum switch tube is improved. When metal bellows Drive the moving contact to make opening and closing action during axial movement.
The electromagnetic system takes into account the good cooperation between the actual suction characteristics and the reaction characteristics, as well as the advantages of low noise and electricity saving when the contactor operates, The stranded double coil is composed of two windings for starting and maintaining, and is switched through an auxiliary switch. In order to facilitate the user to operate the AC power supply, The contactor is equipped with bridge rectifier.
Mechanical latch: when the closing coil is powered on, the contactor is engaged and the mechanical latch is locked; when the tripping coil is powered on, the mechanical latch is tripped, The contactor is released. When the tripping coil is in the hot state, its voltage is within 85% - 110% of Us, making the contactor release reliably.
■ Ordering Instructions
The following contents shall be stated when ordering
Product name and model;
Rated voltage and current of the product;
Rated control power supply voltage (coil voltage) of the product;
Product quantity;
Required conditions and quantity.
