Modern people can't live without electricity. Factories need electricity for production, homes need electricity, offices need electricity, entertainment needs electricity. The power system equipment is complicated, once the failure occurs, the fault situation is complex, troubleshooting is difficult, to people's production and life also bring great inconvenience.

1. Familiar with circuit principle and determine maintenance plan:

When the electrical system of the equipment fails, do not rush to remove it. First, understand the symptom, process, scope, and cause of the fault. Familiar with basic working principle of equipment and electrical system, analyze each specific circuit. Make clear the connection between all levels of the circuit and signal in the circuit of the ins and outs, combined with practical experience, after careful thinking, determine a scientific overhaul program.

In the debugging of the cable fault locator to find the cable fault point, it is necessary to fully communicate with the cable management technical personnel first, obtain relevant information effectively, and make maintenance plans. Firstly, the cable fault type is judged according to the measured insulation resistance, and then the test method is judged. Only in this way can we achieve "twice the result with half the effort", otherwise it is often "twice the effort with half the effort".

2. Pre-loss, post-circuit:

Power equipment is based on the principle of electrical machinery, especially the advanced equipment of mechanical and electrical integration, mechanical and electronic organic coordination in function, is two parts of a whole. Often mechanical components fail, affecting electrical systems, and many electrical components fail to function. Therefore, do not be confused by the surface phenomenon, the failure of the electrical system is not all the electrical itself, may be caused by the failure of mechanical parts. Therefore, before troubleshooting electrical components, it is often twice as effective to repair mechanical system failures.

3. Simple before complex:

The maintenance and repair of faults should adopt simple and feasible methods, followed by complex and accurate methods. During troubleshooting, you need to troubleshoot the intuitive, obvious, simple, and common faults first, and then troubleshoot the difficult and unhandled faults.

4. Repair common diseases first and attack incurable diseases later:

Power equipment is often prone to the same type of failure, is the "common failure". Because common failures are common and have accumulated a wealth of experience, they can be eliminated quickly. In this way, we can concentrate our energy and time to eliminate rare, difficult and odd difficult diseases, simplify steps, narrow the scope and improve the speed of maintenance.

5. External debugging before internal processing:

Exterior means the exterior of the various switches, buttons, sockets and indicators exposed to the exterior of the electrical equipment to complete the seal. The interior refers to the printed circuit boards, components, and various wiring within the housing or seal of electrical equipment. External debugging first, then internal processing, is in the case of electrical equipment without disassembly, the use of switches, travel buttons, buttons on the panel of electrical equipment debugging inspection, reduce the scope of failure. First eliminate the external components caused by the fault, and then repair the machine fault, as far as possible to avoid unnecessary disassembly.

6. First no power measurement, then power test:

First, in the absence of power supply to repair the power equipment: confirm that there is power, and then in the presence of power supply to repair and confirm the power equipment. For many faulty electrical equipment maintenance, can not be immediately energized, otherwise it will artificially expand the scope of failure, burn more components, resulting in undue loss. Therefore, before the faulty machine is powered on. Resistance measurement should be carried out first, and necessary measures should be taken before power maintenance.

7. Public circuit first, then special circuit:

If the common circuit of any electrical system fails, its energy and information cannot be transmitted and distributed to each particular particular circuit. The function of the particular circuit will be affected and its performance will not work. If the power supply of an electrical equipment fails, the whole system cannot run normally, and the energy and information transmitted to various special circuits cannot be realized. So follow the order of public circuit first, then special circuit, can quickly and accurately eliminate the fault of electrical equipment.

8. Sum up experience and improve efficiency