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DS-20 series time relay
product description:
DS-20 series time relay (hereinafter referred to as relay) is used as auxiliary elements in various protection and automatic devices to make the accused element reach the required delay, and is used in the protection device to realize the selective coordination of main protection and backup protection.
Product features:
The DS-20 series time relay is placing the DS-30 movement into the 20 housing.It has the advantages of the DS-30 time relay, and its opening size and wiring diagram are completely consistent with the DS-20 series time relay.
The relay is an electromagnet driving a clock delay mechanism, the electromagnet can be powered by DC or AC power supply, the AC time relay in this series is equipped with a bridge rectifier, the power supply electromagnet.Each relay has two payment transient conversion contacts, one payment delay main contact (termination contact), according to different specifications, can be installed according to one payment sliding delay contact, its delay setting value, can be equal to or less than the setting value of the delay main contact.
When the relay does not operate, Normally closed contacts of transient switching contacts, Delay connection disconnection, Drag pin is zero, When supplying power to the electromagnetic system, Electromagnet suction joint, Transiently switched contacts, The clock mechanism began to turn, The delay moving contact moves towards the closed side, Drive the drag needle rotation at the same time, According to the fixed sliding contact and the main contact of the contact delay, Turn at the stop gear limit mechanism after the main contact is switched on, The mechanism stop relay will remain with the main contact closed, When the power supply is disconnected, each contact instantly returns to the original state, The tow-pin is left there, The indicated value shall conform to the main contact setting value, (Actually the drag pin value should be slightly greater than the main contact setting value, Because the contact can still slide for a distance after the connection, In addition, when the power is off at the end of the delay, The time indicated by the drag pin is completely equal to the delay generated by the moving contact, So ask when the tow pin can indicate the return of the relay, Easy to analyze the problem) drag needle can be convenient outside the relay, Rotate the knob on the lid clockwise, Touch the moving contact and stop, Continue turning the knob, Apply the zero position on the dial to the drag pin.
