1. When the power is cut off for some reason and the power supply cannot be restored in a short period of time, the backup power supply must be enabled:
(1) Cut off the circuit breakers of the mains power supply (including the circuit breakers of the control cabinet of the distribution room, and the mains power cut-off of the dual-power switching box), pull the double-throw anti-backing switch to the side of the self-provided power supply, and keep the self-provided power supply circuit breaker in the dual-power switching box in the disconnected state.
(2) Start the standby power supply (diesel generator set), and when the unit is running normally, close the generator air switch and each circuit breaker in the self-provided power control cabinet in order.
(3) Close the standby power circuit breakers in the power switching box one by one and send power to each load.
(4) During the operation of the standby power supply, the operator on duty shall not leave the generator set, and adjust the voltage and plant frequency in time according to the change of load, and deal with the abnormality in time.
2. When the mains power is rehabilitated, the power conversion should be done in time, the standby power supply should be cut off, and the mains power supply should be restored:
(1) Disconnect the circuit breakers of the self-provided power supply one by one in order, the order is: the self-provided power supply circuit breaker of the dual power switching box→ the circuit breaker of the self-provided power distribution cabinet→ the main switch of the generator→ and the double switch switch will be dialed to the side of the mains power supply.
(2) Shut down according to the diesel engine shutdown process.
(3) In order, close each circuit breaker one by one from the main switch of the mains power supply to each branch switch, and put the circuit breaker of the dual power switching box from the mains power supply in the closed position.
3. Check whether the indicators of each instrument and indicator are normal, and start the cooling fan in the transformer.
Dual-power automatic transfer switch (referred to as dual-power transfer switch) is a molded case circuit breaker or load switch.
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Tianyi switch - the use of dual power transfer switch
1. Install the dual power transfer switch with the power supply to ensure the correct access of the power supply.
2. Adjust the handle of the dual power transfer switch to the "automatic" position, so that the power supply will automatically detect the state of the other power supply, when one of the power supplies fails, the other power supply will ...
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Tianyi switch button - the color meaning of the button and indicator light and the place of use
1. Buttons
1. Red
Operation in hazardous situations. It is often used for emergency stops
Stop and break. It is often used to stop all machines, stop one or more motors, stop a certain part of a piece of equipment, make the electrical components lose power, and have a stop function reset button.
...
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Tianyi switch - the operation precautions of the disconnector switch
(1) Before operation, check that the circuit breaker (switch) is in the opening position accordingly to prevent the isolation switch from being pulled and closed with load.
(2) There is a locking device to prevent misoperation between the knife switch, the grounding knife switch and the switch, and the reverse operation must be carried out in order. If it is locked and cannot be operated, ...
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What requirements should be met by Tianyi switch - disconnector?
(1) The disconnector should have an obvious disconnection point, which is easy to identify whether the electrical appliance is disconnected from the power grid.
(2) There should be reliable insulation between the disconnect points of the disconnector, that is, there should be enough distance between the disconnect points of the disconnector to ensure that it can work reliably under harsh climatic conditions, and ...
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Tianyi switch - the use conditions and applicable places of low-voltage isolation switch
1. The basic conditions for the use of low-voltage isolation switches
(1) The altitude does not exceed 1000 meters;
(2) The ambient temperature is not higher than +40°C and not lower than -40°C;
(3) The relative humidity is not more than 85% (relative to +20±5°C).
2. The low-voltage isolation switch is not suitable for the following ...
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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.
4. Pull the bypass current that is closed by a switch or an isolated switch.
5. Outdoor vertical splitting triple isolation ...
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Tianyi switch - the operation method of dual power automatic transfer switch
First, first place the dual power supply on the adjustment table, and the phase wire and the neutral wire (neutral line) are docked in place, and can not be connected wrongly.
Second, after the line is connected, it is necessary to check the installed line, and then turn on the main switch of the debugging station to turn on the common and standby working power supply.
Three, when the double ...
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Tianyi switch - the difference between high-voltage load switch and circuit breaker
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 - an introduction to the common types of low-voltage switches
1. Frame circuit breaker (universal type) - ACB:
Rated current: In principle, frame circuit breakers are required for rated currents above 630A, and molded case circuit breakers are generally below 630A. It can be seen that the rated current of the frame circuit breaker is much larger, generally 630A-6300A. In addition in segments can ...
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Tianyi switch - the characteristics of the disconnector are introduced
1. Provide an electrical interval and a visible disconnection point during electrical equipment maintenance to ensure the personal safety of maintenance personnel [3] .
2. The disconnector can not be operated with load: it cannot be operated with rated load or large load, and it cannot be divided and combined with load current and ...
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What should be paid attention to in the design of Tianyi switch - switching power supply?
1. Wiring
The design requirements of wiring are very strict in the design of switching power supplies, and they must be done well to pass the test. If the designer does not handle the wiring work in the early stage of design, there will be great safety hazards in the future electricity consumption. So here I recommend you to buy a switching electric ...
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Q&A on Cam Switches and Load Disconnectors (11-21)
Q11: What is the maximum number of connecting rods for the rear mounting of P1 and P3?
A: Up to 4 sections can be added, each section is 25mm.
Q12: Does the P switch with SVB in the model come with PE grounding and N-wire terminals?
A: P switch models with SVB are equipped with PE grounding and ...
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Model introduction of Tianyi cam switch
LW42 series
LW42 series cam switch and safety switch are another series of high-quality products announced by Shanghai Tianyi Electric Appliance Co., Ltd. to meet customer needs.
Device function: personal safety is paramount, LW42 series cam switch and safety switch unique terminal plan ...
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Tianyi switch - the role of low-voltage isolation switch
1. Through the isolation switch, it plays a good insulating role, so that the whole circuit can be safe and secure, and the maintenance personnel or staff also have enough ability to repair the circuit.
2. At the same time, the low-voltage isolation switch can also change the operation mode of the circuit, which is used in the power plant or gas plant.
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Tianyi switch - the high and low voltage division of low voltage switch
36V is a safe voltage, but it cannot be used as a standard for dividing high and low voltages. There are two ways to divide high and low pressure:
1. According to the rated voltage: the rated voltage is 1000V and below is called low voltage; The rated voltage of 1000V or more is called high voltage.
2. According to the voltage of the equipment to the ground...
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Tianyi switching power supply troubleshooting
1. Check the key points:
1) Whether the voltage at point B is 310V.
2) Whether the 15V voltage is normal.
3) Whether the voltage at point C is greater than 14V.
4) Whether the SS terminal of (8) pin IC6 is higher than 10V, whether the SD terminal of pin (10) is lower than 0.6V, and whether there is a square wave transmission at pin 13 and pin 14 ...
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New product release of TPB1TPL1 button signal light
TPB1 series pushbutton switch is designed by VTeam's senior R&D technical team, which is suitable for a variety of industries and various occasions. TPB1 series pushbutton switches have a complete range of colors, rich colors, economic and durable, easy installation and superior performance. Automated production, testing, and quality control are more stringent, and the products are ...
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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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Tianyi switch - the role of the travel switch (limit switch) and its working principle
The scope of use of the travel switch (limit switch).
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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Tianyi switch - the difference between the use of cam switch and load isolation switch
T-cam switches and P-block switches are used in a wide range of standard circuits and currents, and the number of combinations of cam switches is virtually unlimited. Different designs, front panels and dedicated switches ensure optimum sensitivity to meet the requirements.
Q1: P switch and T switch have ...
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