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| Mechanical and electrical life requirements for electromagnetic type current relay | ||||
| Publisher:admin | Add time：2018/10/30 | Viewed：883 | ||
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1. The mechanical life shall not be less than 5000 times. 2. Electric life: when rated load is added, it shall not be less than 1000 times. 3. During the mechanical life test, the relay is operated by applying 2 times of setting value electric quantity, 0.7 times of setting value electric quantity to make it return, and the contact is not loaded (but the signal load with less than 5W should be allowed). 4, the reliability of the life test: in the process of mechanical and electrical life test, the moving system of the relay shall be reliable action and return every time, every time contact shall be reliable to connect and disconnect (noises generating stable arc and contact contact sticking phenomenon), namely the relay in mechanical and electrical life test, shall ensure that the reliability of the work. 5. The electric life test speed shall take into account that there is no harmful heat accumulation or ion accumulation on the contact, so it shall generally be carried out at least once /s. 6. After the life test, the mechanical performance of the relay shall be good, and the added value of its error allowed shall be specified by the technical conditions of the product, and the insulation resistance value shall be allowed to be reduced to 75% of the specified value. |
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