Variable frequency cabinet

Variable frequency cabinetControl cabinet

Product Description:

The frequency conversion control cabinet is mainly used to regulate the operating frequency of equipment, reduce energy loss, ensure smooth start-up of equipment, and minimize the damage to the motor caused by the high current generated when the equipment is directly started. At the same time, it comes with analog input (for speed control or feedback signal), PID control, pump switching control (for constant pressure), communication function, macro function (with different parameter settings for different occasions), multi-stage speed, and so on. It can be widely used for automatic control in various occasions such as water supply, drainage, fire protection, sprinkler network pressurization, HVAC cold and hot water circulation in industrial and agricultural production and various buildings.

Equipment Overview:

The variable frequency control cabinet is carefully designed and manufactured by technical personnel who have fully absorbed advanced experience in water pump control at home and abroad. After years of production and application, it has been continuously improved and optimized.

Variable frequency control cabinet products have overload, short circuit, phase loss protection, as well as pump body leakage, motor overheating and leakage

It has multiple protection functions and complete status display, as well as single pump and multi pump control working modes, multiple main and backup pump switching modes, and various starting modes. It can be widely used for automatic control in various occasions such as water supply, drainage, fire protection, sprinkler network pressurization, HVAC cold and hot water circulation in industrial and agricultural production and various buildings.

The variable frequency control cabinet has excellent internal quality, beautiful and durable appearance, and easy installation and operation, making it a safe and reliable companion for various types of water pumps.

Typical applications: Constant pressure water supply, air compressors, fans and pumps, central air conditioning, port machinery, machine tools, boilers, papermaking machinery, food machinery, etc.

control type

1. Liquid level control: This control cabinet is equipped with a high-performance Key float switch, which automatically controls the on/off of the water supply and drainage pumps based on changes in liquid level.

2. Pressure control: External electrical contact pressure gauge or pressure controller can automatically turn on and off the pump according to changes in pipeline pressure. This type is widely used in domestic water supply and fire pressure boosting systems.

3. Temperature control: an external temperature controller that can turn on or off the pump according to the set temperature range, suitable for applications such as constant temperature and heat exchange systems that require temperature control.

4. Time control: The chassis panel is equipped with a time setting button and a display, allowing users to control the on and off of the water pump according to their timing needs. It is suitable for controlling various timed or regular intermittent working modes.

characteristic analysis

1. Save energy

Compared with traditional control motors, energy conservation is the most practical significance for frequency converter controlled motors. The motor operating conditions supplied according to the demand for water injection and oil transportation are economical, which can save 48.8% of electricity

2. Reduced operating costs

The operating cost of traditional motors consists of three components: initial procurement cost, maintenance cost, and energy cost. The energy cost accounts for approximately 77% of the operating cost of the motor. By reducing energy costs by 44.3% and minimizing the impact of variable frequency starting on equipment, maintenance and repair costs will also decrease, resulting in a significant reduction in operating costs.

3. Improve pressure control accuracy

The variable frequency control system has precise pressure control capability. Match the pressure output of the motor with the required water injection amount of the system. The output of the variable frequency control motor changes with the change of motor speed. Due to the improved accuracy of variable frequency control of motor speed, it can keep the system pressure variation of the pipeline network within a range of 3pisg, that is, within a range of 0.2bar, effectively improving the quality of working conditions.

4. Extend the service life of the motor

The frequency converter starts the motor from 0HZ, and its starting acceleration time can be adjusted to reduce the impact on the electrical and mechanical components of the motor during starting, enhance the reliability of the system, and extend the service life of the motor. In addition, frequency conversion control can reduce current fluctuations during unit start-up, which can affect the electricity consumption of the power grid and other equipment. Frequency converters can effectively minimize the peak value of start-up current.

5. Reduced the noise of the motor

According to the requirements of the motor's operating conditions, after installing variable frequency speed regulation, the motor's operating speed significantly slows down, effectively reducing the noise during motor operation.

Function Introduction

1. Power switching and protection function of variable frequency control cabinet

Variable frequency control cabinets are usually designed with circuit breaker components, which are connected to the incoming power supply and can help the cabinet complete the on/off operation of the circuit. They can also provide protection in the event of a short circuit or overload between the circuit and the frequency converter. In addition, the frequency conversion cabinet can also cut off the power supply during motor maintenance to ensure the safety of operators.

2. Variable frequency speed regulation function of variable frequency control cabinet

The control panel of the variable frequency control cabinet is equipped with a potentiometer for variable frequency speed regulation, which can transmit command signals to the motor and control the motor speed according to the output frequency of the operator. Some products in the frequency conversion control cabinet are equipped with a power frequency switching function to ensure that in the event of a frequency converter failure, the motor is switched back to the power frequency supply through an automatic control circuit.

3. The intuitive control function of the variable frequency control cabinet

The cabinet body of the variable frequency control cabinet is designed with display devices and operation panels, which are connected to the electrical components inside the variable frequency control cabinet. They can intuitively display the operating status of the variable frequency control cabinet, and facilitate operators to control the operation of the variable frequency device and perform on-site operations on controlled equipment such as motors.

On the cabinet of the variable frequency control cabinet, various instruments and indicator lights are also installed, such as voltage meters, ammeters, frequency meters, as well as power indicator lights, alarm indicator lights, operation indicator lights, power frequency indicator lights, etc. The operation and status of the variable frequency control cabinet can be directly reflected on various instruments and indicator lights, achieving real-time monitoring of the working status of the variable frequency converter.

4. Safety protection function of variable frequency control cabinet

The frequency conversion control cabinet concentrates various electrical components, including the frequency converter, inside the cabinet, which can reduce the impact of external environment on electrical components, lower the degree of environmental pollution on electrical components, and also reduce the risk of electric shock for operators of the frequency conversion control cabinet. Therefore, it has a good safety protection effect.

Technical Parameter

1. Variable frequency control cabinet Directly start the control cabinet

Control motor power: 0.37-15KW;

Control voltage: 380V;

Control the number of water pumps: 1-4.

2. Variable frequency control cabinet Triangle start

Control motor power: 15-90KW;

Control voltage: 380V;

Control the number of water pumps: 1-5.

3. Variable frequency control cabinet Automatic pressure reduction start control cabinet

Control motor power: 15-160KW;

Control voltage: 380V;

Control the number of water pumps: 1-5.

4. Variable frequency control cabinet Fully automatic variable frequency speed control cabinet

Control motor power: 0.18-250KW; Control voltage: 380V;

Number of control motors: 1-7 units;

Pressure control accuracy: 0.02MPa or -0.02MPa