1. When closing, first of all, attention should be paid to check that the circuit breaker that can be connected to the dual power automatic transfer switch is indeed in the opening position, and then quickly operate the risk isolation switch to close it (whether the enterprise adopts manual management agency or leveraged financial institution personnel operation), but the force should not be too strong at the end of the near end, so as to prevent a huge impact on the environment. After the operation is completed, it should be checked whether the closing can be intact, that is, the main gate knife and the static contact must be in full contact with a good one.
2. When opening, first of all, we should pay attention to check whether the switch control such as the circuit breaker has been opened, and then we operate slowly, and when the main gate knife leaves the static contact, the operation will be rapidly developed. After the operation is completed, it should be checked whether the risk isolation switch can be in the disconnected position, and whether the mechanism of the safety switch has been locked between them.
3. Some dual power supply accessories are isolated and the control switch also allows the no-load operation current, the charging working current of overhead lines and cables, the calculation current of small load, and the current generated by the network loop by cutting off the transformer. At this time, in order to ensure that the arc can be extinguished quickly, the opening operation should be particularly fast (the current value of allowable breaking is shown in the usage manual of the product). In addition, it should also be noted that: when power is transmitted, the isolation protection switch on the bus side is closed first, and the isolation switch on the line side is closed later; In the event of a power failure, the order of operation time is reversed at the same time.
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Tianyi switch - the allowable operating range of the disconnector
1. Pull together the voltage transformer and lightning arrester under normal conditions.
2. Pull together the 220kV no-load bus.
3. The neutral point of the transformer when there is no ground fault in the latching grid.
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1. Aging of circuit board: The circuit board of the switch button indicator induction circuit board may be aged if it has been used for too long, resulting in leakage in the circuit, and then the induction failure of the indicator light.
2. Sense ...
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Tianyi switch - what are the functions of limit switches?
1. Protection
The most important role of the limit switch must be its protection effect, the limit switch is also known as the travel limit switch, which is mainly used to control the stroke of mechanical equipment and limit protection. In practice, the travel limit switch is installed in a pre-arranged position, and the travel limit switch is installed in a pre-arranged position.
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Tianyi switch - the characteristics of low-voltage isolation switch
1. When overhauling electrical equipment, provide an electrical interval and a visible disconnection point to ensure the personal safety of maintenance personnel.
2. The disconnector can not be operated with load: it cannot be operated with rated load or large load, and it cannot be divided or combined with load current and short circuit current.
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The range of use of travel switches (limit switches) is very wide, so what is the effect of travel switches (limit switches)? The position switch (limit switch) refers to the maintenance of the micro switch from external forces, oil, water, gas, ...
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(1) First of all, when operating the isolation switch, you should first check that the circuit breaker of the corresponding circuit is indeed in the disconnected position to prevent the load from pulling and closing the isolation switch.
(2) When the line is stopped and the power is transmitted, the isolation switch must be pulled and closed in order. During the power failure operation, the circuit breaker must be pulled first, and then ...
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Tianyi switch - the reason why the air switch trips and cannot be pushed
1. What is the reason why the empty trip cannot be pushed?
1. If the air opening itself is faulty or damaged, the air opening should be replaced with a new one.
2. If the line is caused by a short circuit, the line should be found first, and then reconnected.
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The main features of VTeam X42 series limit switches
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LX19-001/111 in the LX19 series, LXK3-20S/T in the LXK3 series, JLXK1 series JLXK1-111/411/511 in the conventional travel switch are the most representative.
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First, the characteristics are different
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2. Proximity switch: The proximity switch has the characteristics of a limit switch, and at the same time has the sensing performance.
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Tianyi switch - the difference between high-voltage load switch and high-voltage isolation switch
1. The high-voltage load switch can be broken with load and has the function of self-extinguishing arc, but its breaking capacity is very small and limited.
2. The high-voltage isolation switch is generally not able to break with load, there is no arc extinguishing cover in the structure, and there is also an isolation switch that can break the load.
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Tianyi switch - the operation precautions of the disconnector switch
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Tianyi switch - the use of dual power transfer switch
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Tianyi switch - the characteristics of the disconnector are introduced
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Tianyi switch - analysis of wiring questions and answers of button switches
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Tianyi switch - dual power supply automatic transfer switch normal working conditions
1) Ambient air temperature: The upper limit of ambient air temperature is +40°C, the lower limit of ambient air temperature is -5°C, and the average value of ambient air temperature for 24h does not exceed +35°C
2) Altitude: The altitude of the installation site does not exceed 2000m.
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