In the substation, the autotransformer can replace the ordinary transformer in some cases, and its application mainly has the following aspects:First, power transmissionIncrease voltage levelIn long-distance power transmission, in order to reduce line losses, it is necessary to increase the voltage level. The autotransformer can easily increase or decrease the voltage to meet the power transmission needs of different voltage levels. For example, when transporting electrical energy from a power p

VD4-12 Spring-operated circuit breaker control, signal circuitSFA:change-over switchSFB:change-over buttonQF:Dc air circuit breakerQC:Ground switchWCC:Wire Connection CenterV:Rectifier bridgeThe inside of the frame is divided into the inside of the circuit breaker car

The circuit breaker cannot normally be pulled out directly while in the closed position.First, safety design considerationsPrevent arc hazardsWhen the circuit breaker is in the closed position, current usually passes through the circuit. If the circuit breaker is forcibly pulled out at this time, an electric arc may occur. Arcing is a high-temperature, high-energy discharge phenomenon that can pose a serious burn and electric shock hazard to operators. For example, in high-voltage circuits, the

In the boost transformer, the tap changer mainly has the following uses:First, adjust the output voltageAdapt to input voltage changesThe input voltage in the power system may fluctuate for a variety of reasons, such as changes in the load of the grid, and the output of the generation equipment is unstable. The tap-changer can adjust the transformer ratio according to the change of the input voltage, so as to maintain the stability of the output voltage. For example, when the input voltage is re

I. Basic Principles and Functions of Tap ChangerThe taps of a transformer are used to regulate the output voltage of the transformer. The voltage in the power grid will change with the operation mode and load size. Voltage that is too high or too low will affect the normal operation of the transformer and the output and service life of the electrical equipment. In order to improve the quality of the voltage and ensure that the transformer has a rated output voltage, the voltage is usually adjust

The current of the rotating motor usually has the potential to drive another motor to rotate, but in some cases it may not be driven, mainly for the following reasons:1. Electrical parameters do not matchVoltage mismatchDifferent motors may have different voltage rating requirements. If the voltage corresponding to the current output of the rotating motor is significantly different from the rated voltage of the other motor, it may not be able to drive the motor to rotate. For example, if the cur

The primary and secondary windings of an autotransformer are partly shared.The connection of the autotransformer is as follows:First, winding structureThe winding of an autotransformer consists of a continuous coil, one part of which is the primary winding and the other part of which is both a part of the primary winding and a secondary winding. For example, the coil of an autotransformer can be divided into three parts, where the two ends of the part are connected to the power supply and the lo

If the alternator runs in the opposite direction, it generates an electric current.When the alternator runs in reverse, there is still relative motion between the magnetic field and the conductor inside it. According to the principle of electromagnetic induction, as long as the conductor does the motion of the magnetic induction line in the magnetic field, the induced electromotive force will be generated in the conductor. If the circuit is closed at this time, an induced current will be generat

Here are two common types of autotransformers:Single-phase autotransformerMainly used in single-phase AC circuit, common in some small electrical equipment voltage regulation, starting and other occasions. For example, in some laboratory equipment, single-phase autotransformers can be used to regulate the voltage to meet the voltage requirements of different experiments. It has the characteristics of simple structure, small size and low cost.Three-phase autotransformerIt is used in three-phase A

1. The way electricity passes through the bodyDirect contact Conductive object contact: When the human body directly touches the charged conductor, the current will enter the human body through the contact point. For example, touching exposed wires, touching electrical equipment with leakage, etc. At this point, the current will enter the body from the contact point, and then through the various tissues and organs of the body, and finally flow to the earth or other grounded objects. Humid enviro