The use of electrical complete equipment can not avoid the emergence of problems, do a good job of prevention in advance to reduce the emergence of problems, we need to know what fault problems will appear, such as the main situation of electrical complete equipment trip?
The load capacity of the main switch is less than the total load capacity of the separate switches. The main switch has leakage protection device but not separated off, when the use of electrical leakage is greater than or equal to 30 ma when the main switch trip; Two levels of complete electrical equipment protection does not match, try to use the same brand of complete electrical equipment; Often with load operation of the main switch lead to electric carbonization contact poor resistance increases current increases heat trip; Failure can not be correctly judged by the protection of subordinate complete electrical equipment configuration; The aging of the complete electrical equipment causes the shunt trip time to be longer. Replace a shunt trip whose time is shorter than the split switch of the previous level.
In case of grade-exceeding trip of superior complete electrical equipment, if it is found that there is shunt protection action, but the shunt complete electrical equipment does not trip, the electrical complete set of the same level shall be cut off, and then the superior complete electrical equipment shall be restored; If it is found that none of the shunt protection works, it should be checked that there is no fault within the scope of power failure. If there is no fault, the superior electrical complete set of equipment can be closed and each shunt complete set of electrical equipment can be tried one by one. When the power electrical complete set of equipment is sent to a branch and then trips again, it can be determined that the electrical complete set of equipment is faulty electrical complete set of equipment, and the line can be isolated, repaired and replaced.
Tripping of complete electrical equipment must meet two conditions, one is the fault current reaches the set value, the other is the fault current duration reaches the set time length, so to ensure that the complete electrical equipment does not skip the trip, it must cooperate well in the current set value and time set value. To ensure that there is no leap-step trip, it is necessary to test the total actual operation time of complete electrical equipment with follow-up equipment, and ensure the correct coordination with the time length of actual test results.
What is the main situation of grade-jumping trip of complete electrical equipment? The above is the relevant answer to the question, if you have any questions about this, you can contact us through the website www.tongyuhengcheng.com, professional online for you to solve the doubts!