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1) Signal light: the red light is on to indicate closing, and the integrity of the opening circuit is monitored at the same time; A green light indicates that the closing circuit is open and the integrity of the closing circuit is monitored.
2) Universal transfer switch (i.e., opening and closing operation handle): when in the vertical position (after closing), it is closing; When it is in the horizontal position (after opening), it is opened.
3) Indicator (sign) of the operating mechanism: CT type or CD type operating mechanism can be confirmed by the "close" and "divided" displayed by the observation hole of its shield; The CS-type actuator can be checked by the indicator and the operating handle.
4) Opening spring: in the tensile state, it is closing; In the shrinking state, it is open.
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The universal transfer switch is mainly selected according to the application, wiring method, required contact number and rated current.
1) The installation position of the universal transfer switch should have a certain gap with other electrical components or metal parts of the machine tool, so as to avoid it.
During the on-off process, a short-circuit fault to ground occurs due to arc ejection.
2) The universal transfer switch should generally be installed horizontally on the screen plate, but it can also be installed obliquely or vertically.
3) The on-off capacity of the universal transfer switch is not high, when used to control the motor, the LW5 series can only control to.
under the small capacity motor. If it is used to control the forward and reverse rotation of the motor, it can only start in reverse after the motor has stopped.
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The universal transfer switch is in the vertical position, and the route is interrupted, why is this circuit broken because of the state? Because it is an open circuit, it should be an open circuit, why is it an equation?
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The exact position of the switch is that the state of the circuit breaker is normally closed.
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Crossing the circuit breaker, this is a gentleman's suit Luban.
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If the switch is different, it may have a different state, and it may be different from each other to produce it.
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Why does the circuit breaker state when it is in a vertical position? This should be a working state.
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When the universal transfer switch is in the vertical position, it should be in the state of the path.
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The universal transfer switch is in the vertical position during the period, and the circuit breaker indicates that there is a problem with your installation, so you can reinstall it.
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When the universal transfer switch is in the vertical position, the state of the circuit breaker should also be closed.
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When the universal transfer switch is in the vertical position, the circuit breaker should be open.
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The universal transfer switch is in the vertical position when the circuit breaker is located. is in a disconnected state.
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The universal transfer switch is in the vertical position, and the circuit breaker should be in the state of off.
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Well, now there are a lot of switches that are universal converters wow, its location because it has a broken circuit worker, well, that is, some problems with the broken circuit.
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Universal converter in the switch vertical disposal of open circuit problems. You're him, and I feel like it's supposed to be a circuit.
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If the universal transfer switch is in the disposal position, and the machine is in a very stable state, I think it should be like this.
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Usually this universal transfer switch will disconnect the router.
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If the circuit breaker is in constant state due to the vertical position of the universal transfer switch, it means that it has been short-circuited, or the fuse is not in the state.
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I believe that the universal transfer switch is in a vertical position, and the harvest section actually belongs to the one that is used to disconnect in the case of power failure.
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Because at the moment of suction and disconnection, it will cause overheating and deformation of electric shock due to high current and instantaneous voltage, commonly known as "brushing", which refers to long-term repeated work, which will lead to a little deformation of electric shock, burr, and easy to close or open at a certain point and other points at the same time, which may lead to accidents, and the transfer switch can be directly opened and closed by external force, and the button may only be the external force of its own spring because of the "external force", and elastic fatigue may occur after long-term use, resulting in a longer process of closing and opening. It is more likely to burn and get electrocuted. The first voltage of the coil used in the contactor is generally not high, and the coil can be controlled with weak current, such as using a 24-volt voltage loop to control 220 or 380 circuits, which is safe, and the proportion of the above faults is generally very low in the same frequency of use, so it can be controlled by a button.
Circuit breaker (English name: circuit-breaker, circuit breaker) refers to a switchgear that can close, carry and break the current under normal circuit conditions, and can close, carry and break the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use, and the division of high and low voltage boundaries is relatively blurred, and generally more than 3kV is called high-voltage electrical appliances.
Contactors are divided into AC contactors (voltage AC) and DC contactors (voltage DC), which are used in electricity, power distribution and consumption. Contactor in a broad sense refers to the electrical appliances that use the current flowing through the coil to generate a magnetic field and close the contact to control the load in industrial electricity.
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The transfer switch is directly connected to or disconnected from the outlet point with a copper bar.
There is a coil inside the contactor, which is a switch for secondary control.
1. The voltage of the high-voltage circuit breaker is very high, if the contactor is used to control the on-off, the instantaneous induced voltage of the contactor coil is very high, which will cause inductive feedback to the contactor coil, burn the coil, cause damage to the contactor, and may also cause safety accidents, and the transfer switch, without induction system, direct conversion, plus arc extinguishing system, withstand high voltage and current, will not cause damage to other electrical appliances and itself.
2. Why does the contactor use a button, first, the button provides a voltage to the contactor control coil, so that he can induce to control the other side of the breaking system, or the coil problem, the button is disconnected after providing a starting voltage, and there is no need to power on, but the universal transfer switch is always connected, and it cannot be automatically disconnected after the power is completed.
If you insist on using a contactor to control the high-voltage circuit breaker, then the contactor should be made of a huge bearing capacity, and the safety performance is improved, which is expensive.
You can also use the universal transfer switch to control the contactor, then you need to turn it on and turn it on, and then manually hit it to disconnect, if you don't bother.
Which equipment is controlled with what is the best solution that is actually needed at the moment, can be adapted, but must meet the requirements.
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How to control the coil after a power outage. It can only be controlled with an AC contactor when there is electricity. The high-pressure side is not good at all, and the low-pressure cannot be used once, which is too dangerous.
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I haven't heard of this, but I think the transfer switch is intuitive, and it can be said to be interlocking in itself.
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I'll explain it to you.
AC contactor CJX2 1210 where CJ is the AC contactor X2 represents the design serial number 12 represents the rated current, 10 means with one normally open point and 0 normally closed point. AC contactors are widely used in electric drive systems, as a control appliance with frequent or breaking load circuits, AC contactors are electrically operated, so they are suitable for long-distance operation and automatic control systems.
The AC contactor is composed of an electromagnetic system, a contact system, an arc extinguishing device and an accessory of the mechanism, and the AC contactor does not have an overcurrent protection function, so it needs to be used in conjunction with an electrical appliance with an overcurrent protection function. Such as fuses, moving air circuit breakers, thermal relays, etc.
Thermal relay NR2-25 NR indicates thermal overload relay 2 indicates design serial number 25 indicates the rated current value. Thermal relay is a kind of overcurrent relay with anti-time overload protection characteristics, which is widely used for overload protection of motors, and can also be used for overload protection of other equipment.
Universal transfer switch LW26GS-20 LW indicates the class group code 26 indicates the design code GS indicates the current specification, and 20 indicates the number of contact groups.
It is mainly used for long-distance control of various power distribution devices, and can also be used as the conversion of electrical measuring instruments and the control of starting, braking, speed regulation and commutation of small-capacity motors.
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1. The biggest difference between AC circuit breaker and DC circuit breaker is the arc extinguishing ability (mainly in DC extinguishing) 2. Look at his logo AC-DC.
3. The upper and lower levels should choose 3-5 times the grade difference.
4. Look at where you use it: power, motor, and lighting are all different 5. Look at the logo.
6. Increase arc extinguishing capacity.
7. No. The rest of the questions cannot be explained in a few words.
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Whether the circuit breaker is divided into DC and AC. They are differentiated. I summarize the specific differences between them as follows.
6. Increase arc extinguishing capacity.
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The bus cabinet must be equipped with a transfer switch to facilitate the voltage at both ends and prevent the power supply from being misaligned.
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Combination switches belong to ( ).
d Protect electrical appliances.
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The combined circuit should be a protective load.
Now that it's clear that it's a switch, there's only one kind of QF
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Combination switches belong to (c). A, knife switch B, circuit breaker C, contactor D, protection electrical appliances.
Choose C for this question
Combined switch refers to a switch that is often introduced as a power supply in the electrical control circuit, which can be used to directly start or stop a low-power motor or make the motor forward or backward, reverse and so on. The combination switch is composed of moving contacts (moving contacts), static contacts (static contacts), rotating shafts, handles, positioning mechanisms and shells.
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A combination switch is essentially a knife switch, except that the operating handle of a general knife switch rotates up or down in a plane perpendicular to its mounting surface, while the operating handle of a combined switch rotates left or right in a plane parallel to its mounting surface.
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Send me the drawings and take a look.
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