How To Determine Whether The Surge Protector Needs To Be Replaced - Take A Look And You Will Know

Surge protectors play an extremely important role in lightning protection inside buildings. The probability of lightning surge damage to the lines installed with surge protection device will be greatly reduced. Many readers will also have questions when using surge protectors: How do we judge whether the surge protector has failed, and how to judge whether the surge protector needs to be replaced. Today, the editor will talk about this issue.

For surge protective device, the important indicator to judge whether it has failed is the size of the leakage current. According to technical specifications, surge protectors must be inspected annually, and the detection of leakage current is one of the most important indicators. When it is necessary to reach the first measurement of I1ma, the actual measured value of the leakage current of the surge protector should not exceed the maximum value of the leakage current in the manufacturer's test report; when the number of valve plates cannot be determined, the actual measured value of the surge protector should not be greater than 20μA. In subsequent measurements, the actual measured value of the leakage current of the surge protector composed of a single-chip MOV and multiple MOVs should not be greater than 1 times the initial measurement value.

In addition to fixed leakage current detection, we can observe whether there is obvious shell defect on the appearance of the surge protector. If there is mechanical damage to the shell visible to the naked eye, it is easy to cause an accident and needs to be replaced in time; general surge protectors usually have failure indications. If there is an internal failure, we can also observe the indicator window to determine. If it turns red, it means it needs to be replaced. In addition to the above points, considering the material quality and life of the surge protector, users with conditions should replace the surge protector every 5 to 10 years to prevent fire accidents caused by SPD deterioration.

Regarding how to judge whether the surge protector needs to be replaced, the editor has roughly introduced it here. It is recommended that users choose products with indicator windows when choosing surge protectors for easy maintenance; and try to choose SPDs without leakage current, which are safer and have a longer service life.