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Explosion proof electrical equipment in use must be regularly inspected, with a testing cycle of at least 3 years. The specific explanation is as follows:

Regulatory requirements: According to the national AQ 3009-2007 "Explosion proof Specification for Electrical Safety in Hazardous Areas", explosion-proof electrical appliances in use must be entrusted to a testing center with explosion-proof professional qualifications for performance, installation, and maintenance testing at least every 3 years. Non conformities detected must be rectified in a timely manner, and the inspection report and rectification situation must be filed with the safety production supervision and management department.

Necessity analysis: Explosion proof electrical equipment is a consumable item, and its performance will gradually decrease over time of use. In addition, if maintenance personnel lack knowledge of explosion prevention or operate improperly, it may lead to equipment failure, further reducing or even losing explosion-proof performance. Regular inspections can promptly identify potential hazards and take measures to minimize the risk of explosion accidents.

Enterprise practice: Many enterprises will proactively shorten the testing cycle or increase the testing frequency for safety reasons, in order to further reduce risks. For example, some high-risk industry enterprises may commission testing once a year or dynamically adjust testing plans based on equipment operation status.