(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, then the line side isolation switch, and then the bus side isolation switch. The order of power transmission operations is reversed from the order of power outages. This is because in the event of a misoperation, the scope of the accident can be narrowed in the order described above and the accident can be artificially expanded to the busbar.
(3) During the operation, if serious defects such as serious damage to the insulator and serious damage to the drive rod of the disconnector are found, the operation shall not be carried out.
(4) When the disconnector is operated, there should be a duty officer on duty to check its opening and closing positions, simultaneous conditions, contact depth and other items on site phase by phase to ensure that the disconnector action is correct and the position is correct.
(5) The disconnector should generally be operated in the main control room. When the remote control electrical operation fails, manual or electric operation can be carried out on the spot, but only with the permission of the station manager or technical person in charge, and with on-site supervision.
(6) Electrical, electromagnetic and mechanism locking devices are installed between the isolation switch, the grounding switch and the circuit breaker to prevent misoperation. When reversing the gate, it must be carried out in order. If the locking device fails or the isolation switch and the grounding switch cannot operate normally, the corresponding circuit breaker and knife switch position status must be checked strictly according to the requirements of the locking.
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Tianyi switch - introduction to the types and characteristics of limit switches
Conventional domestic travel switch
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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The main features of VTeam X42 series limit switches
Uses: X42 series limit switches can be widely used in various types of mechanical equipment, automatic assembly lines and other light and medium load occasions, can detect the object action state, such as presence and absence, movement position, end of stroke, etc.
Overview: The switch is mainly composed of switch operating parts, ...
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Tianyi switch - the characteristics and classification of load isolation switch
First, the characteristics of the load switch
A load switch is a switchgear between a circuit breaker and an isolation switch. It has a simple arc extinguishing device, which can cut off the rated load current and a certain overload current, but cannot cut off the short-circuit current
Second, the classification of load switches
According to the operating voltage ...
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Tianyi switch - the difference between high-voltage load switch and high-voltage circuit breaker
1. The high-voltage load switch can be used as a load switch, which has the effect of self-extinguishing arc, but its breaking volume is very small and very limited.
2. The high-voltage isolation switch generally cannot be used as a load switch. There is no arc extinguishing cover in the structure, and there are also disconnectors that can switch loads on and off, but the structure is different from load switches ...
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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 method of adjusting the current of Tianyi switch
1. Change the reference current of the feedback module
Regulating the reference current is the most basic way to regulate the output current of a switching power supply, and it can usually be achieved by rotating a potentiometer or toggling a switch. Changing the reference current allows the magnitude of the feedback current to be compared with it, so as to control the switch ...
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Tianyi switch - the working condition of the air switch
Ambient air temperature: upper ambient air temperature +40°C; The lower limit of ambient air temperature is -5°C; The average temperature of the ambient air for 24 hours does not exceed +35 ° C.
Altitude: The altitude of the installation site does not exceed 2000m.
Atmospheric conditions: Atmospheric relative humidity at ambient air temperature of +4 ...
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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 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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Tianyi switch - dual power supply automatic transfer switch operating procedures
1) When there is a power outage for any reason and the power cannot be restored in a short period of time, the backup power supply must be activated
1. Cut off the circuit breakers of the mains power supply (including the circuit breakers of the control cabinet in the distribution room, and the mains power supply cut-off of the dual power switching box), and pull the double-cast anti-reverse switch to the side of the self-provided power supply to ensure that the power supply is protected.
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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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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 classification of proximity switches and their introduction
(1) Eddy current proximity switch
This type of switch is sometimes called an inductive proximity switch. It is the use of conductive objects when they are close to the proximity switch to produce eddy currents inside the object. This eddy current reacts to the proximity switch, causing the internal circuit parameters of the switch to change, so as to identify the presence or absence of ...
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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 - 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 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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VTeam switch - introduction to the advantages and disadvantages of linear power supply
Merit:
Good stability: Linear power supply can provide stable output voltage and current, which is very suitable for circuits and equipment that require high power supply accuracy.
Low noise: Linear power supplies have low noise, which is advantageous for applications that require a low-noise power supply.
Responsiveness ...
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Tianyi switch - 5 methods to suppress ripple in switching power supply
1. Increase inductance and output capacitance filtering
According to the formula of the switching power supply, the current fluctuation in the inductor is inversely proportional to the inductance value, and the output ripple is inversely proportional to the output capacitance value. Therefore, increasing the inductance and output capacitance can reduce ripple.
In the same way, the output ripple is the same as the output ...
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VTeam switch – the working principle of linear power supply
The working process of the main circuit of the linear power supply is that the input power supply is first converted into a DC power supply by the pre-regulated circuit after the initial AC voltage regulation, and then the linear adjustment element is finely adjusted under the intelligent control of the control circuit and the monolithic microprocessor controller, so that the ...
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Tianyi switch - the model meaning of the proximity switch is introduced
Unmarked/Z: Inductive/inductive self-diagnosis
C/CZ: Capacitive/Capacitive Self-Diagnosis
N: NAMUR safety switch
X: Analog
F: Hall
V: Reed type
J: Threaded cylindrical
B: Cylindrical
Q: Angular cylindrical shape
...
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