Hubei Xiangming Electric Technology Co

Overview


The series of high-voltage cage motor electro-hydraulic starters are starting equipment specially developed to improve the asynchronous starting performance of large and medium-sized AC asynchronous motors and high-voltage synchronous motors. It has soft starting characteristics of small and constant starting current and gradually increasing speed. Its performance and effect are far superior to reactor starting and self-coupling step-down starting. This product can be widely used in high-voltage cage AC asynchronous motors in industries such as steel, petrochemicals, building materials, chemicals, fertilizers, papermaking, pharmaceuticals, and metallurgy.

Basic Principle

The series of high-voltage cage motor electro-hydraulic starters changes the resistance of the liquid resistor in the stator circuit so that the starting voltage of the motor follows the rotation of the motor. The differential rate decreases and increases, and the starting current remains below three times the rated current.

Performance characteristics

With soft starting performance, the starting current is times the rated current
Can be started several times continuously, and starts smoothly, without impact on mechanical equipment
It has little impact on the power grid. The voltage drop of the power grid during starting is within the range and the power factor is above.
Closed-loop control type, starting current can be preset, constant current starting.



Scope of application
Suitable for soft starting and protection of three-phase AC, squirrel-cage asynchronous motors or synchronous motors with rated power up to 100%.
Working principle
Insert a three-phase liquid resistor in series into the stator circuit of the controlled motor. The liquid resistor is automatically put in when the motor is started. The resistance value decreases steplessly within a predetermined time and is close to zero. It is automatically cut off when the motor is running, so that the terminal voltage of the motor gradually increases, the torque gradually increases, and the voltage starts smoothly without impact.
Performance characteristics
The starting current is small, smooth and impact-free, ensuring reliable operation of the power grid
The starting current is approximately the rated current
It can be started continuously~times
It has a complete motor Protection alarm function
Small impact on the power grid, no harmonic pollution, especially suitable for enterprises with insufficient power grid capacity
It can reduce liquid resistance and increase motor terminal voltage, increase motor output, and ensure a successful start
Smooth starting, small mechanical stress impact, effective protection of motors and transmission machinery
Simple structure, easy installation and maintenance, and high reliability.
Comply with standards
～AC metal-enclosed switchgear
High-voltage AC motor liquid resistance starting device/
Main technical parameters
Product specifications

Motor
Power


Starting
Time


Liquid normal
Operating temperature
(℃)

Voltage resistance to ground
Voltage resistance between phases


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Pre-tuning

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Preliminary Tuning

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Pre-tuning

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Pre-tuning

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Specially designed according to technical requirements


Primary plan diagram
Ordering instructions
Please provide the following information when ordering
Motor model, rated power, rated voltage, rated current, stator connection (, △), whether the star point can be opened< br/>Load characteristics driven by electric motor
If you have special requirements, please negotiate with our company to place an order.