This is called air delay head, clockwise screw time increases.
Air delay head (air damping time relay), also known as airbag time relay, it is the use of air through the small hole when the principle of damping to obtain the delay. It consists of 3 parts: electromagnetic system, time delay mechanism and contacts.
The electromagnetic mechanism is a direct-acting double E-type core, the contact system is borrowed from the LX5 micro switch, and the time-delay mechanism adopts the airbag-type damper. Electromagnetic mechanism can be DC or AC, it can be made into both power-on delay type and power-off delay type. The air inlet hole is large, the piston moves fast, the delay time is short; air inlet hole is small, the piston moves slow, the delay time is long.
1, the role of the auxiliary contacts of the contactor, the main contact is generally normally open contacts, and auxiliary contacts often have two pairs of normally open contacts and normally closed contacts, small contactors are also often used as an intermediate relay with the main circuit.
2, auxiliary contacts are divided into normally open and normally closed, depending on the needs of specific circuits, if the self-locking circuit, it is connected to the normally open contacts, interlocking circuits to be connected to the normally closed type. Contactors are used in circuits that utilize the on-off of the secondary circuit to control the on-off of the primary circuit.
3, the basic components of the contactor, the main contactor armature, there are two parts, part of the static, part of the movable, in the static part of the armature on the set of coils, the movable armature linked to the main head and auxiliary head.
4, plus the shell, the main outlet and auxiliary outlet are composed of static and dynamic contacts, dynamic contacts is the part that can be active, static contacts is the part that can not be active, the main contacts are used to pass the load current.