0577-27863830

13506677568

Banner
Home > news > Content

Mechanical and electrical life requirements of electromagnetic current relays

Mechanical and electrical life requirements of electromagnetic current relays


1. The mechanical life should be no less than 5000 times.


2. Electrical life: When the rated load is added, it should be no less than 1000 times.


3. During the mechanical life test, apply 2 times the setting value electricity to the relay to make it operate, 0.7 times the setting value electricity to make it return, and no load is applied to the contacts (but the signal load should be less than 5W).


4. Reliability of life test: During the mechanical and electrical life test, the movable system of the relay should reliably move and return every time, and the contacts should be able to be reliably turned on and off each time (no stability between the contacts) Arcing and sticking of dynamic and static contacts), that is, the reliability of the relay in the mechanical and electrical life test should be guaranteed.


5. The speed of the electrical life test should consider that there is no harmful heat accumulation or ion accumulation on the contacts, so it should generally be performed at no more than 1 time / s.


6. After the life test, the mechanical properties of the relay should be good. The allowable added value of the error is specified by the product technical conditions. The insulation withstand voltage value is allowed to be reduced to 75% of the specified value.

æ • ° å­—å¼ æ—¶é—´ç »§ç” µå ™ ¨