When the electrical system of an equipment fails in Guizhou electric equipment company, do not rush to dismantle it. First of all, it is necessary to understand the cause, process, scope and phenomenon of the electrical equipment failure, be familiar with the basic working principle of the equipment and electrical system, analyze each specific circuit, and clarify the mutual connection between all levels in the principle and the origin and sequence of signals in the circuit Detailed analysis. We should be good at seeing the essence through phenomena and grasping the main contradictions of things. Combined with my practical experience, after careful thinking, determine a scientific and practical maintenance program. Among them, the quick and effective maintenance skill is "six priorities"

(1) First mechanical, then electrical. Electrical equipment is based on the electrical mechanical principle, especially the advanced equipment of mechatronics and instrument integration. Mechanical and electrical functions are organically coordinated, which are two aspects of a whole. Often mechanical components failure, affect the electrical system, many electrical components of the function will not work. Therefore, we should not be confused by the surface phenomenon, but through the essence of the phenomenon. The failure of the electrical system is not all caused by the electrical itself, but may be caused by the failure of mechanical components. Therefore, the first overhaul of mechanical system generated by the fault, and then eliminate the electrical part of the fault, often receive twice the result with half the effort.

(2) First simple, then complex. This skill has two meanings: first, when troubleshooting, you should first use the simplest and most skillful method of maintenance personnel, and then use complex, accurate or unfamiliar methods. Second, when troubleshooting, first remove the intuitive, obvious, simple and common faults, and then remove the difficult faults that have not been dealt with. In short: easy before difficult

(3) First external debugging, then internal processing. External refers to various switches, buttons, sockets and indicator lights exposed outside the enclosure or seal of electrical equipment; internal refers to printed circuit boards, components and various connecting wires inside the shell or seal of electrical equipment. First external debugging, then internal processing, is to use the switches, buttons, knobs, sockets and other debugging inspection on the electrical equipment panel to compress the fault range without dismantling the electrical equipment. First, remove the fault caused by the external parts of the electrical equipment, and then repair the internal fault of the equipment to avoid unnecessary disassembly as far as possible

(4) The static side test was carried out first, and then the dynamic side measurement was carried out. "Static" refers to the maintenance of electrical equipment without power supply after failure; dynamic "refers to the maintenance of electrical equipment after power on. Most electrical equipment can not be powered up immediately after maintenance. If it is powered on, it may artificially expand the fault range, damage more components, and cause undeserved losses. Therefore, before electrifying the faulty electrical equipment, the resistance should be measured first and necessary preventive measures should be taken before power on maintenance

(5) First public circuit, then special circuit. If the common circuit of any electrical equipment fails, its energy and information can not be transmitted, and the functions and performances allocated to specific circuits and special circuits will not work. If the power supply part of an electrical equipment fails, the whole system will not work normally, and the energy and information transmitted to various special circuits cannot be realized. Therefore, only by following the sequence of public circuit and special circuit, can the fault of electrical equipment be eliminated quickly and accurately

(6) First check and repair the disease, then attack difficult and miscellaneous diseases. Electrical equipment is often prone to the same type of fault, which is a common fault. Due to the "common faults", which are relatively common. There are many times of treatment and elimination methods, and rich experience accumulated, so it can be quickly eliminated. In this way, we can concentrate our energy and time to eliminate the rare, difficult and complicated problems. We can simplify the steps, reduce the scope, and have some measures to improve the maintenance speed.

Guizhou electric equipment company points out: things are often changeable and different. The same kind of fault of electrical equipment may have different appearances, and the same appearance may be different faults. It is more complex for multiple faults to exist at the same time. Maintenance skills should be targeted, flexible, and the order is not fixed. After the maintenance of any faulty electrical equipment, we can't think everything is all right. Dedicated electricians should record the fault phenomenon, cause, maintenance process, skills, experience, etc. in a special notebook. At the same time, learn and master the mechanical and electrical theory knowledge of various new electrical equipment, be familiar with its working principle, and upgrade their own experience, skills and experience into theory. Under the guidance of theory, the specific fault analysis can be accurate, rapid, less detours and improve the efficiency of troubleshooting. Only in this way can we train ourselves to be experts in repairing electrical equipment. This is also the electrical equipment maintenance skills: "sum up experience, improve efficiency.".