How to connect the positive and negative poles of the 12-volts transformer?
If the positive and negative poles of the 12-volts were reversed, the connection must be disconnected first. If there was only one string of the inverse, the inverse could not be started when the positive and negative poles were connected in reverse, and the indicator light and screen would not light up, but the inverse would not be damaged. After the positive and negative poles were reconnected correctly, the inverse could work normally. If it was a two-way string of MPPM, if the two strings were connected in reverse, the inverse could not be started, and the indicator light and screen would not light up. If one was connected in the right way and the other was connected in the reverse way, the two-way string was equivalent to an internal short circuit. The component short-circuit current was amplified by 15%, and the fuse would not be blown. The voltage of the reverse MPPM was very low and could not generate electricity. Although the inverse would not be damaged, the components would slowly burn out and might even cause a fire. If an MPMT multi-way string was connected in reverse at the same time, the inverse could not be started, and the indicator lights and screen would not light up. If one way was connected correctly and the other ways were connected in reverse, or if one way was connected in reverse and the other ways were connected correctly, the string would be short-circuited internally, and the current would increase by more than two times. If the inverse had a fuse, the fuse would blow out and the circuit would be broken, which could avoid a fire. However, after the fuse burned out, the voltage at both ends would double, which might cause the inverse to be damaged by over-voltage. When connecting, pay attention to the positive and negative labels on the power supply and the power supply. For example, red is the positive pole and black is the negative pole. According to the principle of connecting the positive pole to the positive pole and the negative pole to the negative pole, the connecting wire should be thick and should be reasonably selected according to the length of the wire. If the novice is not very familiar with it, you can first measure the voltage with a Multimeter (using the direct current voltage), and confirm that the direction of the measured voltage is consistent with the direction required by the transformer. Read more exciting novels for free
How to connect the 48-volts direct current motor to the positive and negative rotation
For a 48V shunt-excited direct current motor (the motor junction box has four terminal blocks, two excitations, and two armatures), as long as the switch is used to change the voltage of the armatures, the direction of the motor can be changed. The following methods could also be used: 1. If it was manually controlled, a mechanical switch could be used to realize the forward and reverse rotation of the motor. A double-pole double-throw switch could be used. The connection method was as follows: When the switch was turned up, the A pole of the direct current motor was connected to the true voltage of 48V, the B pole was connected to the ground voltage of 48V, and the motor was rotated forward (reverse). When the switch was turned down, the B pole of the direct current motor was connected to the true voltage of 48V, the A pole was connected to the ground voltage of 48V, and the motor was rotated backward (forward). 2. A two-way relay was used to realize the positive and negative rotation of the direct current motor. When the relay is not working, the A pole of the direct current motor is connected to Vac (48V), the B pole is connected to Ground, and the motor is rotating forward (reverse); when the relay is connected, the B pole of the direct current motor is connected to Vac (48V), the A pole is connected to Ground, and the motor is rotating backward (forward). 3. The positive and negative rotation circuit was formed by two relay (each relay had three contacts, normally open, normally closed and public, respectively. The action of each group of contacts was controlled by two groups of coil). The positive and negative rotation of the motor was realized by controlling the power supply and power failure of the two groups of coil: - When the two sets of coil are cut off, the motor is in a stopped state; - When the first group of coil is energized and the second group of coil is de-energized, the current loop is formed to make the motor rotate forward; - When the second group of coil is energized and the first group of coil is de-energized, the current loop is formed to cause the motor to rotate in reverse; - When both sets of coil were energized, the motor stopped. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Where will the positive and negative poles of the charger burn?
If the positive and negative poles of the charger were reversed, the resistance of the charger and the electronic components of the power supply might be burned. When the charging connection was reversed, there would be a large current flowing through the battery and the charger. Because the current was too high, the battery would heat up violently, causing the plate to swell and be damaged. The active material would fall off, reducing the power storage and service life. The charger might have a situation such as burning the high-power resistance surface at the output end. For a battery charger with anti-reverse connection function, if the positive and negative poles were connected in reverse, there would be no voltage output. In this case, the charger itself might not burn the components, but it would not work normally. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The positive and negative poles of the electric car charger are reversed
When the positive and negative poles of the electric car charger were reversed, it would not explode, but it would burn the charger's rectify component and high-frequency transformer. Because the voltage of the battery and the charger were added during charging, the current would flow into the charger in the opposite direction and would not be controlled by the circuit, which might burn the charger. If the charger fuse is not broken, if the output part of the copper foil is blown after opening the charger (this situation is usually caused by the positive and negative poles), it may return to normal after connecting the broken copper foil and replacing the damaged components. There were also cases where the E-shaped circuit was burned, and it could be repaired by reconnecting it (this method was shared by non-professionals). In addition, a short period of negative and positive reverse connection may not have much effect on the battery, but it will burn the battery over time. The degree of battery damage is directly proportional to the length of reverse connection. If the battery is charged in reverse, it is equivalent to a short circuit, and the battery may burn or explode. When using, try to use the original charger or the same model to avoid the occurrence of the positive and negative pole connection. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The positive and negative poles of the camera's charging battery
Different brands of camera batteries had different positive and negative labels. For example, Lingye camera batteries had positive and negative labels; Canon original batteries did not have positive and negative labels; Green Giant Rechargeable camera batteries had positive and negative contacts in the slot and positive and negative labels beside them. In the case of a camera charger connected to a camera, the positive and negative poles were not on the side of the camera or charger alone. Nowadays, it was mostly a wire or plug type, usually with the positive pole inside and the negative pole outside. In addition, in the charging flashlight, the red power cord was connected to the positive battery, which could be used as a reference, but the connection of the camera battery needed to be determined according to the specific product. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The positive and negative poles of the filter pump are connected in reverse.
The positive and negative poles of the data line are inserted in reverse
If the positive and negative poles of the data lines were inserted in the opposite direction, many situations could occur. First of all, it might not show that it was charging, and it would cause great damage to the phone. If maintenance was needed, it might cost more. One solution was to change the chip, but the labor cost was too high. The other was to short circuit the tail plug with the battery compartment contact to charge the battery and cut off the detection resistance. However, in this case, you could also consider buying a universal charger and a backup battery. In addition, if it showed that it was charging, it meant that it was connected correctly and could be used without worry. It could also be a production error that caused the positive and negative poles to be inserted in the opposite direction, such as a worker's welding error, or a lack of quality inspection when the economy was not good and the labor cost was reduced. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Can the positive and negative poles of the pressure transmitter be reversed?
The positive and negative poles of the pressure transmitter cannot be reversed. When the pressure transmitter is connected, different connection methods have clear line definition. For example, in the three-wire system, the positive power supply and the positive signal each use one line, and the negative power supply and the negative signal share one line; the two-wire system is that the direct current power supply supplies power to the field transformer through two lines while transmitting the output signal; the four-wire system is two power lines and two signal lines. If the positive and negative poles were connected in reverse, the pressure transmitter might not work properly and might even damage the equipment. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Will the negative and positive poles of the cell phone battery burn the screen?
The negative and positive poles of the phone battery might cause the current to be abnormal, which would trigger the battery protection mechanism. The phone would automatically enter the white screen state for safety, but this did not mean that the screen was burnt. There were also opinions that modern mobile phones had reverse phase protection, so the battery would not burn the phone parts because of the positive and negative poles, but the phone might not be able to turn on. However, there was no clear indication that the battery's positive and negative poles would directly burn the screen. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to Look at the Positive and Negative Poles of the Voltmeter and Ampere Meter
Generally, the zero line of an ammeter or a voltage meter was on the left side, and the pointer was tilted to the right when it was energized. If the positive and negative terminal of the voltage meter or ammeter were connected in the opposite direction, the pointer would deflect in the opposite direction. This situation was more obvious in the direct current meter, but the alternating current meter did not have a positive and negative pole, so there was no such problem. In severe cases, it was easy to burn the meter if the positive and negative poles were connected in reverse. If the meter was damaged, it might affect the circuit. For example, in some circuits, if the voltage meter or ammeter was damaged, it would affect the measurement results or the normal operation of the circuit. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What if the positive and negative poles of the generator slip ring are connected in reverse?
Aiya, if the positive and negative poles of the generator slip ring were connected in reverse, he couldn't just leave it alone. First of all, he had to quickly cut off the power supply. He couldn't let it continue to work in the case of a wrong connection. Otherwise, it might cause a lot of trouble, such as damaging the equipment. After that, he had to carefully re-connect the positive and negative poles. If he wasn't sure what to do, it would be best to find an experienced technician to deal with it. After all, they were professional and could guarantee that the matter would be resolved safely and correctly. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>