What Is a Solenoid Latch?

The design of the electromagnetic lock (or magnetic lock) is the same as that of the electromagnet. It uses the principle of electromagnetism. When the current passes through the silicon steel sheet, the electromagnetic lock will generate a strong suction force to tightly attract the iron plate to lock the door. . As long as a small current electromagnetic lock will generate great magnetic force, the access control system that controls the power supply of the electromagnetic lock recognizes that the person is powered off immediately, and the electromagnetic lock can open the door if it loses suction.

The design of electromagnetic lock (or magnetic lock) and

As long as a small current electromagnetic lock will generate great magnetic force, the access control system that controls the power supply of the electromagnetic lock recognizes that the person is powered off immediately, and the electromagnetic lock can open the door if it loses suction. Because the electromagnetic lock does not have a complicated mechanical structure and the structure of a bolt, it is suitable for the access control of an escape door or a fire door. The lock body is protected with an infused epoxy resin inside.

The suction strength of electromagnetic locks is now expressed in LB (pounds), and the test method is static pressure. The so-called static pressurization is to gradually increase the pulling force on the adsorption iron plate after the electromagnetic lock is energized. When the suction force of the electromagnetic lock is exceeded, the adsorption iron plate is opened instantly. Moreover, the force of the electromagnetic lock and the adsorption iron plate must be face to face and pressurized in a straight line, so the suction force of the electromagnetic lock is the maximum. The adsorption iron plate may be temporarily magnetized due to the magnetic induction of the electromagnet for a long time ^[2]

Indoor magnetic locks are widely used in important buildings at home and abroad, and have become an important link of high-tech access control systems. Compared with traditional locks, their advantages are strong suction, low power consumption, stable and reliable quality, and monitoring signals. Feedback output, protection from external damage, no noise, and fire and anti-theft features.

The magnetic lock is divided into two types of hanging type and embedded type according to different installation environments ^[3]

Withstand tension: 80kg 150kg 180kg 280kg 300kg 350kg 500kg etc .;

1) Working voltage: AC and DC 220V, 110V.

2) Auxiliary contact: current 3A.

3) Current 6A (the circuit breaker is locked) ^[3]

Automatic reset: After the electromagnetic lock is unlocked, the latch can automatically return to the locked position.
Manual reset: After unlocking the locked object, the electromagnetic lock can artificially return the lock bolt to the locked position.
Manual unlocking: The electromagnetic lock can be unlocked with the help of a special tool when the solenoid coil is not energized.
Lock insurance: After the electromagnetic lock locks the locked object, even if the locked object has the unlock condition, it can only be unlocked with the help of a special tool ^[3]

Indoor electromagnetic lock:

Maximum ambient air temperature: + 40 ° C
Lower limit: -10 in general area and -25 in high cold area
Altitude: divided into 1000m, 2000m, 3000m
Humidity: The daily average value is not more than 95 [%], the monthly average value is not more than 90 [%], air pollution, etc. are 0, 1 or 2 in GB / T5582 without frequent severe vibration.
Indoor electromagnetic lock:

Maximum ambient air temperature: + 40 ° C
Lower limit: -30 in general area and -40 in high cold area ^[3]

Electromagnetic locks are mainly applicable to the front and rear cabinet doors of indoor high-voltage switchgear, which need to be locked to achieve interlocking to prevent misoperation. In addition, in order to meet the needs of integrated automated substations, some electromagnetic locks have also added auxiliary contacts in the lock, which can provide users with a pair of corresponding switch contacts at the joint position of the lock. It is an ideal locking device for modern substation equipment in order to avoid lost air distance ^[3] .