What are the advantages of GIS combined appliances and how should they be maintained?- SF6在线监测系统_SF6检漏仪_SF6传感器_SF6密度继电器

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What are the advantages of GIS combined appliances and how should they be maintained?

发布时间：2016-05-23 来源：ydlcb 浏览次数：40次

GIS fully enclosed combined electrical appliances advantages: small footprint, less space, high operational reliability, small maintenance workload, long maintenance cycle, not affected by external environmental conditions, no electrostatic induction and corona interference, low noise level, good seismic performance, strong adaptability.

It is especially suitable for use in coastal, plateau and polluted areas. Daily maintenance mainly refers to the inspection of external equipment in operation, which mainly includes the following items:

(1) Whether the signal indication is correct Check whether the various state signals in each standard interval control cabinet are consistent with the actual state of each component of the interval, that is, consistent with the opening and closing instructions of each component, and observe whether the pressure values of the system meet the requirements from the front. Mainly refers to the operating oil pressure (air pressure) of the circuit breaker, and the density value of sulfur hexafluoride in each gas chamber.

(2) Check whether there is abnormal sound in the operating experience of the second international survey shows that the breakdown of insulation is still a large proportion of the total number of failures, insulation failures are gradually developed, and often accompanied by the sound of discharge, equipment in the operation process, the sound of the power station is generally very small, and very stable, if there is abnormal sound in the cylinder. It is likely to be caused by discharge, and should be paid great attention to so that measures can be taken to deal with it in time.

(3) Observe whether the wiring terminals in the control cabinet are overripe and discolored.

(4) Check whether the fixing screws of the components in common operation are loose.

(5) Check whether the grounding switch grounding hold and the grounding components are reliably grounded. The above items are frequently checked items in the operation of the equipment. In addition, each manufacturer will give its own requirements according to its own product characteristics, so it is necessary to carefully read the corresponding installation and use instructions in addition to routine operation and maintenance, but also need to carry out regular maintenance, maintenance refers to stop operation, general inspection and repair of the outside, the cycle can be carried out once every 3 to 5 years according to the operating status of the equipment. It mainly includes the following items:

(1) The operating characteristics of each component of the circuit breaker switching time measurement, isolation switch, grounding switch action time measurement, fast isolation switch and fast grounding switch switching speed measurement, if the switch does not operate for a long time, should be artificially a switching operation every year, especially for the spring operating mechanism to be more so. Because if it is not run for a long time, the various locking devices of the spring mechanism will rust, and serious operation failure will be caused, therefore, regular operation is very necessary.

(2) Cleaning and lubrication of electric operating mechanism and spring operating mechanism.

(3) Measurement of main circuit resistance and insulation resistance of some components.

(4) The moisture content of each gas room. There are many sealing links of closed combined electrical appliances, so the sealing problem is the key to the long-term stable operation of the closed electrical appliances. Especially for the sealing parts of the frequently operated components, regular inspection should be carried out.

The inspection can be carried out with a gas leak detector with a sensitivity of not less than 10.3/, and the moisture content of the gas in each operation is an important indicator. Especially for the presence of arc decomposition gas chamber, such as circuit breaker gas chamber, because the gas under the high temperature of the arc, decomposition and ionization will occur. Some of them form low fluoride. When there is water in the gas, it will generate substances with strong toxicity and corrosion, and most of these products are absorbed by the adsorbent installed inside the circuit breaker. However, some of them will be on the surface of the insulator, and these attachments will cause serious corrosion to the insulator, greatly reducing the electrical resistance of the insulator along the surface, and creating major hidden dangers for the safe operation of the equipment. Therefore, regular moisture measurement can not only eliminate hidden dangers, but also detect gas leaks early. Because the increase in moisture content is often caused by the existence of air leakage links in the equipment, in addition, in addition to the above maintenance and regular maintenance, in the operation process, there are also temporary maintenance problems, when abnormal conditions are found. When some components reach the specified number of uses (such as the number of circuit breaker breaking load current or the number of short-circuit current breaking, etc., to reach the required maintenance value), it is necessary to carry out local maintenance, replace the components that cannot be used, then it is necessary to negotiate with the manufacturer.