The time, purpose and execution standards of electrical equipment handover tests and electrical equipment preventive tests are different. The details are as follows:

1. Electrical equipment handover test

The electrical equipment handover test refers to the acceptance test after the installation of electrical equipment is completed. Newly installed electrical equipment must pass the test before completion acceptance procedures can be processed.

The purpose of the handover test:

1. To check whether the quality of the electrical equipment produced by the manufacturing unit is qualified.

2. Check whether the electrical equipment is damaged during the installation process and whether the installation quality meets the requirements of the regulations.

3. Check whether the newly installed electrical equipment meets the technical requirements for operation of the power system. In this way, after the electrical equipment is put into operation, if a problem occurs, it will be easier to distinguish the responsibilities and find out the specific cause. The handover test report of electrical equipment must be archived and saved to provide basic reference data for future operation, maintenance and accident analysis.

The handover test of electrical equipment shall comply with the current national standard GB50150-2006 "Standard for Handover Test of Electrical Equipment in Electrical Installation Engineering". The new standard GB50150-2016 has been released and will be implemented on December 1, 2016.

2. Preventive testing of electrical equipment

Preventive testing of electrical equipment refers to testing equipment that has been put into operation in accordance with the prescribed test conditions (such as prescribed test equipment, environmental conditions, test methods and test voltages, etc.), test items and test cycles.

The purpose of the preventive test:

Compare the test results with the previous test results of the equipment, compare with the test results of similar equipment, refer to the relevant test results, and based on the change patterns and Trends, and after comprehensive analysis, determine whether the equipment can continue to be put into operation. It is an important measure to prevent accidents and equipment damage and ensure the safe operation of equipment.

Preventive testing of electrical equipment follows the electric power industry standard DL/T596-2005 "Preventive Testing Procedures for Electrical Equipment".