The problemsof singular power detection in the old communities arevery common, which leads to great hidden danger in residents' stable and safe power utilization. In recent years, power operation, maintenance and retrofitin old communities in many countries has become a concern of the residents.

Electrical equipment, such as switch contacts, cable joints, busbar joints, and various contacts and connection points of generators, transformers and motor junction box joints, etc., after applied with current, the temperature of the equipment will change. The heat is proportional to the square of the incoming ...