Explosion-proof magnetic starter principle

The explosion-proof magnetic starter consists of a steel stamped casing, a steel floor, an AC contactor, a thermal relay and corresponding wiring. It should be equipped with a start-stop button switch and correctly connected to the manual signal cable. When the start button is pressed, the AC contactor coil installed in the magnetic starter is energized, the armature drives the contact group to close, and the power supply (generally the motor) is turned on, and the auxiliary contact is self-locked. When the stop button is pressed, the internal AC contactor coil loses power, the contacts are disconnected, and the power supply for the appliance is turned off and unlocked.

According to different control needs, the magnetic starter can also be flexibly wired to make it electric and change functions. The built-in thermal relay provides overload protection for the motor being controlled. The setting current of the thermal relay should meet the motor power requirements. Explosion-proof magnetic starter Features: 1. The outer casing is made of cast aluminum material, molded and beautiful. It has the advantages of anti-aging, no deformation, impact resistance, antistatic and corrosion resistance.

2. This product adopts labyrinth waterproof structure and has good waterproof and dustproof function.

3. All exposed fasteners are made of stainless steel, sealed with silicone rubber, resistant to oil, acid, alkali and high temperature.

4. The built-in components are shaped by the company, and components such as AC contactors, thermal relays, and circuit breakers are installed.

The explosion-proof magnetic starter is a full-voltage direct start, which allows the full-pressure direct start in both the grid capacity and the load. The advantages are convenient operation control, simple maintenance and economical. Mainly used for starting low-power motors, this method should not be used for motors larger than 11kw.

The explosion-proof magnetic starter is structurally composed of an AC contactor and a thermal relay. A protective magnetic starter with a closed outer casing and an open magnetic starter without a casing. Magnetic starters are commonly used for operating switches of locally controlled or remotely controlled motors. The thermal relay in the magnetic starter has the protection feature that makes the circuit disconnect when it is overloaded. The voltage loss protection is realized by the AC contactor (when the button is operated), the magnetic starter does not have the short-circuit protection function, and the motor is The main circuit is connected to the fuse.

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