Circuit breaker UL certification from its name we can see that this is used to do, and it is also after continuous improvement after more and more standard, in order to let more people familiar with it, the next small series for everyone to introduce the circuit breaker UL certification standard is what.
before doing UL certification of circuit breakers, we must first understand what a circuit breaker is. Then this thing is a switching device that can close, carry and break the current under normal circuit conditions, and can close, carry and break the current under abnormal circuit conditions within a specified time. It is an essential accessory device in industrial equipment. Then UL certification of circuit breakers is to certify UL489.UL489 molded case circuit breakers, molded case switches and circuit breaker enclosure standards through testing. When doing UL certification of circuit breakers, we need to carry out the following tests. First, we need to carry out temperature rise test, followed by calibration test, followed by life test, short circuit test of circuit breakers, and its withstand voltage test and moisture absorption test. Then in UL certification of circuit breakers, there are two kinds of certification methods, UL489 and UL1077. In these two UL1077 is mainly to do the additional protection function of UL489, which is widely used in the certification process of over-current and over-voltage protection devices, because its operation speed is faster than UL489, isolating the fault source and quickly solving the problem. As the first circuit breaker UL certification certification, UL489 is mainly used for distribution deviation protection, especially inserted into the residential input point of the power system distribution box or distribution meter, so this certification method is mostly used for branch circuit protection.
So when we are ready for UL certification of circuit breakers, we must first confirm the UL standard, certification cost and time, sample quantity, etc. on which the test is based in time. At the same time, we must prepare the data according to the requirements of circuit breaker UL certification. The information needed here is the information and documents of the enterprise. When all this is ready, the enterprise can send the sample to the relevant professional institutions for product testing, this process is the sample testing link. When the product test report comes out and meets the requirements of UL certification standards for circuit breakers, professional organizations will formally issue the test report. This report is a very heavyweight report, indicating that the product has passed the test and can begin to be sold and circulated, and the safety is also very good. At the same time, UL will also inspect the production plant so that it can ensure compliance with the standard requirements. When all the audits meet the requirements, the applicant can be officially authorized to use the UL mark.