Electronic time relay, also known as semiconductor time relay. A time relay made of semiconductor components. It has a series of advantages such as wide applicability, high delay accuracy, convenient adjustment, and long service life, and is widely used in automatic control systems. Semiconductor delay circuits can be roughly divided into two categories: resistive capacitive (composed of resistors and capacitors) and digital. If the output of the delay circuit is a relay with contacts, it is called a contact output; if the output is a contactless component, it is called a contactless output.

working principle:

Relays are coil type relays with delay mechanisms, available in both AC and DC specifications. The AC specification of the relay is that the relay is equipped with a bridge rectifier inside, which rectifies the AC power and supplies it to the electromagnetic mechanism. Each relay has two sets of instantaneous conversion contacts, one set of sliding delay contacts, and one set of delay main contacts. When voltage is applied to both ends of the coil, the armature (iron core) overcomes the reaction force of the tower spring and is sucked in. The instantaneous conversion contact performs instantaneous conversion, and the delay mechanism starts. After a certain delay, the sliding delay contact and the delay main contact are closed. After the main contact comes into contact, the mechanism stops due to the rotation of the upper gear limiting mechanism, thus obtaining the required delay. When the coil is powered off, under the action of the tower spring, the rotor and delay mechanism return to their original positions.

Debugging method:

Press the trigger of the electromagnetic mechanism by hand to the suction position, and the delay mechanism will immediately start until the delay contact is closed. At this moment, the instantaneous switching contact should be reliably switched.

When releasing the trigger (in the working position), the moving contact should quickly return to its original position, and the instantaneous switching contact should be reliably switched.

When the pump is sucked in, the moving plate at the end of the pump must not collide with the fan-shaped toothed plate in the delay mechanism. If they collide, the moving plate can be moved down to the appropriate position and then the screw can be tightened.