Since the relay relay coil KO is powered, the normally-opened contact KO is closed and the normally closed contact KOI is turned off. Because the impedance of the green signal lamp LD is much smaller than that of the anti-kick relay coil KO, Anti-trip relay contact KO: The anti-trip relay coil KO is kept in a power receiving state.
Due to the relay relay contact KO, disconnecting the closing circuit, no matter whether it is an accident or artificial opening, manual closing cannot be achieved. Similarly, when using the jump relay TWI in the comprehensive protector to replace the green signal, due to the jump position The resistance value of the relay coil of the relay relay TWI and the ZN 63 A vacuum circuit breaker in the anti-kick relay KO is unreasonable, and the electromagnetic interference is serious, so that the comprehensive protector emits continuous and different sound.
Improvement of the original design control loop According to the analysis of Figure 1, the vacuum circuit breaker wiring is unreasonable. Although the design idea is to directly monitor the state of the closing coil by the green signal lamp or the jumper relay TWI. The anti-trip relay coil KO is either held by the green signal lamp LD or the mutual electromagnetic interference of the jump relay TWI coil, so that normal loop control cannot be realized. The green signal lamp LD or jumper relay coil is separately led to a breaker normally closed auxiliary contact DL 4 in series. After the improvement, it can solve the problem and monitor the status of the breakers.
The use of a comprehensive protector integrated protector is an automatic protection component that integrates multiple functions such as protection, measurement, fault recording, and communication, and its superior performance is unmatched by conventional relay protection.
At present, it has been widely used in power supply systems and has the tendency to replace conventional relay protection. Many integrated protectors are equipped with an anti-trip relay TB J, which should make better use of the anti-trip relay TBJ on the integrated protector; at the same time, the jumper relay TWJ coil on the integrated protector does not have to bring out a circuit breaker normally closed auxiliary. Contact, can directly monitor the circuit breaker closing coil HQ, but must disconnect z N 63 A 0, improve the vacuum circuit breaker secondary circuit closing control diagram vacuum switch on the jumper circuit breaker KO coil connection.
Compared with other processing methods such as canning and freezing, the processing method of dried fruit is relatively simple in equipment and operation, and the production cost is relatively low. The production process of dried fruit is: raw material pretreatment, blanching or soaking in alkali, sulfur fumigation, dehydration, wetting, sorting and packaging.
The pretreated fruit is heated with boiling water or steam or other methods for a short time, which is called blanching. The main purpose of blanching is to use heat to drive out the air in the fruit tissue and destroy the oxidase in the fruit to prevent oxidative discoloration. In addition, after the fruit is blanched, mesh-like fine cracks are formed on the surface, which can speed up the evaporation of water, shorten the drying time, and prevent the generation of large cracks during later heating; blanching can also eliminate and wash away the residue on the surface of the fruit. Microorganisms and dirt.
The temperature and time of blanching vary according to the type, variety, maturity, texture, size, etc. of the fruit. Generally, it is treated in boiling water for 5 to 15 minutes. The purpose of fruit soaking in alkali is mainly to remove the wax through the action of alkali, so as to facilitate the evaporation of water and promote drying. In addition, the fruit is immersed in hot lye, which can remove the microorganisms remaining on the surface and has a disinfection effect.
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