What is a short circuit and what are the dangers of short circuiting? Electrical .

Short circuit is an electrical wiring technique used to equipotential the connection of both ends of a load or component of a load nature.

The short circuit itself does not pose a hazard, but an inappropriate short circuit will cause harm.

Possible hazards such as short circuits, malfunctions, etc.

Again: The uses of shorting include:

Relieve the coil of its specific working state (such as pick-up state, alarm state) from the loss of pressure;

The three windings of the motor are shorted in a specific way to realize the operation of the motor in the star-shaped wiring mode;

Short-circuit a control command to disarm its control function;

And so on and so forth.

Short circuit generally refers to the use of conductors to cross the two ends of a certain or certain components in a circuit, so that it loses its original function. Shorting is generally only used in case of emergency. Short circuits can only be used at the same potential. The two ends of the load generally cannot be shorted.

The short circuit can remove the emergency operation of some electrical control components, and only use it in more urgent situations.

The existence of every electrical component in the electrical control system has its reason, and short circuit is equivalent to removing a part of the electrical components. This is unscientific and dangerous.

The simple thing is to know that the welding machine is, and the short circuit is very harmful, so there is no need to go into detail.

Short circuit means that the power supply is directly connected to a closed circuit by the wire without passing through the electrical appliance.

Hazards: When the short-circuit current increases suddenly, the instantaneous heat release is very large, which greatly exceeds the heat generation of the normal operation of the line, which can not only burn the insulation, but also melt the metal, causing a fire caused by the combustion of combustibles.

That is, the electrical appliance is short-circuited, and the electrical appliance fails, which is equivalent to being connected with a wire.

Shorted. It is also called local short circuit, and leakage means that one of the electrical appliances in the circuit is short-circuited, while other electrical appliances can operate normally.

Short circuit: It is the electrician who accidentally connects the zero line in the line with the live wire in the wrong bend in the operation, and the line has a partial short circuit phenomenon (short circuit means that the effective resistance in the line is zero. Will trip or blow out the fuse.

If not handled in a timely or improper manner, it can lead to wiring (including electronic components.

Damage, in severe cases, can lead to electric shock, disaster or personal shock injury.

It is easy to have a path and a short circuit in the three states of a circuit, but the problem of a short circuit and a short circuit is a difficult content to understand in the process of learning electricity in junior high school, especially in the circuit diagram.

It is also difficult for students to identify short circuits and short circuits.

Clause. 1. The difference between short circuit and short circuit:

Directly connect the positive and negative poles of the power supply with wires, this situation is called short circuit, the power supply is short-circuited, there will be a large current in the circuit, and the power supply may be burned out, which is not allowed.

If the circuit is connected, but the two ends of the appliance are directly connected by the wire, this situation is called the appliance being shorted, pay special attention to the bulb is shorted, not the bulb is burned out, but there is no current flowing from the bulb, so the bulb does not emit light.

Clause. 2. How to identify short circuits and short circuits in a complex circuit.

1. The method of judging the short circuit: starting from the positive pole of the power supply and following the direction of the circuit, find out the paths back to the negative pole of the power supply, as long as one of them is not connected to the electrical appliance, it will cause a short circuit of the power supply.

2. In the future, when doing the problem, as long as there is a situation of opening and closing in the question, we must consider whether there is a short circuit in the circuit. This problem is more difficult to understand, first of all, we must clarify the definition of short circuit and short circuit, and secondly, we should draw more circuit diagrams and summarize more.

Clause. 3. In order to enhance the intuitiveness of learning, it is recommended that students connect the circuit by themselves to see if there is such a phenomenon, and be sure to practice it.

1. Circuit short-circuit: It is the wrong connection between the zero line and the live wire in the electrician's operation or misoperation, and the line is disturbed and partially short-circuited. If the treatment is not timely or improper, it can lead to damage to the grip and line, and the heavy can lead to electric shock, causing disasters or personal electric shock injuries.

2. Short circuit is to short circuit the two ends of a certain component in the series circuit, but the other components work normally, similar to shielding this component.

Short-circuit is the electrician's careless or misoperation in the operation of the line Danyan Road in the line and the live wire misconnected, the line has a partial short circuit phenomenon (short circuit refers to the effective shed in the line is zero or off or burns the fuse).

If the treatment is not timely or improper, it can lead to damage to the circuit (including electronic components), and can lead to electric shock, disaster or personal shock injury.

There are two cases of shorting:

1. Power short-circuit: directly connect the positive and negative poles of the power supply with wires, which will damage the power supply.

2. Short circuit of electrical appliances: directly connect the two terminals of electrical appliances with wires, and the result: electrical appliances do not work.

The difference between short die and silver circuit and short circuit:

1. The formation conditions are different.

Short circuit: Refers to the short circuit or part of a circuit.

Short circuit: It is the wrong connection between the zero line and the live wire in the line due to careless or misoperation in the operation of the electrician, and the line is partially short-circuited.

2. The consequences are different.

Consequences of short circuit: high current, low voltage, interference suppression and destruction of the stable operation of the system, line loss, heat loss, reactive power, etc., affecting communication, communication and so on.

Consequences of short circuit: light can lead to damage to the line (including electronic components), heavy can lead to electric shock, disaster or personal shock injury.

After the short circuit, there is no electricity in the line, and the current is directly connected to the two poles of the power supply without passing through the electrical appliances. <>

Shorting is a method of detecting or repairing electronic or electrical circuits that artificially short-circuit live poles or "ground". This maintenance method requires a certain amount of theoretical knowledge and maintenance experience, and must not be carried out blindly. With the help of short circuit maintenance application is more extensive and common, such as electrolytic capacitor with bleeder resistor, if you suspect that the bleeder resistor is open, but the circuit can not work normally, the electrolytic capacitor can be short-circuited and discharged, but it should be noted that the capacity of the capacitor is too large, the working voltage is very high, and it cannot be short-circuited and discharged, so as not to damage the capacitor or circuit.

Household lighting system, power electricity and battery, it is strictly forbidden to short circuit between zero fire wire, two-phase fire wire, and battery poles! FYI.