Starting Reactor
High voltage starting reactor is a device used to limit and reduce the starting current of high-voltage motors.
The working principle of high-voltage starting reactor is to increase the internal resistance of the line by connecting a reactor in series during motor starting, thereby reducing the starting current. After the motor is started, short-circuit the reactor through the bypass switch without increasing the loss of the circuit. When a high-voltage motor starts from a stationary state, due to the small internal resistance of the motor, the starting current will be very large, which may cause voltage fluctuations in the power grid and even affect the stability of the power grid. To reduce this impact, a reactor is usually connected in series during motor start-up, and the starting current is reduced by increasing the internal resistance of the circuit.
Starting reactors can be divided into unit type starting reactors and coil type starting reactors according to their structural forms. Unit type starting reactors use a single reactor element, while coil type starting reactors use a set of coil reactors to attenuate the starting current of the motor.
The circuit diagram for starting the reactor mainly includes the reactor, adjustable resistor, contactor, and other parts. During the starting process of the electric motor, when the power supply starts supplying, the reactor will control the magnitude and time of the starting current of the motor, and gradually reduce the reactance value to improve the operating efficiency of the motor. Meanwhile, adjustable resistors can help reduce voltage drops during the starting process of electric motors and stabilize the power system.
The role of the starting reactor in the process of starting an electric motor is to regulate and protect the electrical and load characteristics of the motor. Starting the reactor can stabilize the load of the motor, avoiding problems such as voltage drop and excessive motor load caused by uneven load. At the same time, starting the reactor can also protect the motor and power supply, preventing sudden voltage fluctuations from causing damage to them.
It can reduce the starting current of the motor and avoid damage to the motor due to excessive starting current.
It can stabilize the voltage of the power system and avoid voltage fluctuations during the starting process of the electric motor.
It can protect the motor and avoid overloading and motor damage caused by uneven load.
It can reduce the noise during the start-up of the electric motor and play a role in shock absorption and buffering.
Starting reactors are widely used in motor starting control systems, which can ensure the safe and stable operation of the motor, while also avoiding damage to the motor caused by uneven load and voltage fluctuations, enhancing the stability and operational efficiency of the motor system.
Product Standard:
GB/T 1094.6-2011 IEC 60076-6：2007
GB/T 1094.1-2011 IEC 60076-1：2011
GB/T 1094.3-2017 IEC 60076-3：2013
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