Variable Frequency Control CabinetPrimarily used for adjusting equipment frequency, reducing energy consumption, and ensuring smooth start-ups to minimize damage to the motor from high currents during direct startups. It also features analog input (for speed control or feedback signals), PID control, pump switching control (for constant pressure), communication functions, macro functions (with different parameter settings for various scenarios), and multi-speed capabilities. It is widely applicable to automatic control in various fields such as agriculture, industry, and construction, including water supply, drainage, fire protection, sprinkler system pressure boosting, as well as HVAC hot and cold water circulation.

The Variable Frequency Control Cabinet is meticulously designed and manufactured by technicians who have fully absorbed advanced domestic and international pump control experiences. After years of production and application, it has been continuously improved and optimized.

The Variable Frequency Control Cabinet features multiple protection functions such as overload, short circuit, phase loss, pump body leakage, motor overheating, and leakage protection, as well as comprehensive status display. It offers single and multi-pump control modes, various primary-secondary pump switching methods, and various starting methods. It is widely applicable for automatic control in various scenarios such as water supply and drainage, fire protection, sprinkler system pressure boosting, and HVAC hot and cold water circulation in industrial and agricultural production as well as in various buildings.

The frequency converter control cabinet boasts excellent internal quality, attractive and durable appearance, easy installation and operation, and serves as a safe and reliable companion for various 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. Level Control: This control cabinet is equipped with a high-performance Key float ball switch, which automatically controls the start and stop of the water supply and drainage pumps based on the high and low level changes.

2. Pressure Control: Equipped with an external electric junction pressure gauge or pressure controller, it can automatically start or stop the pump based on changes in pipeline pressure. This model is widely used in domestic water supply and fire-fighting boost systems.

3. Temperature Control: Equipped with an external temperature controller that operates the pump on or off based on the set temperature range, suitable for applications requiring temperature control such as constant temperature and heat exchange systems.

4. Time Control: The cabinet panel features a time setting button and a display. Users can control the pump's on/off according to scheduled needs, suitable for various timed or regular intermittent working modes.

Feature Analysis:

1. Energy conservation

Inverter-driven motors, compared to traditionally controlled motors, offer significant energy savings. The motor operating condition, supplied based on water and oil flow demand, is an economical state, which can save up to 48.8% in electricity.

2. Reduced operational costs

The operating costs of traditional motors consist of three components: initial purchase cost, maintenance cost, and energy cost. The energy cost accounts for approximately 77% of the motor's operating costs. By reducing the energy cost by 44.3%, and with the reduced impact on equipment after variable frequency start-up, maintenance and repair volumes also decrease, leading to a significant reduction in operating costs.

3. Enhance pressure control accuracy

The variable frequency control system boasts precise pressure control capabilities, matching the motor's pressure output to the system's required water injection volume. The output of the variable frequency control motor varies with changes in motor speed. Due to the enhanced precision in controlling the motor speed, it can maintain the system pressure of the pipeline within a 3pisg range, or 0.2bar, effectively improving the quality of the operating conditions.

4. Extend the lifespan of the motor

VFD starts the motor from 0Hz, allowing adjustable acceleration time to minimize the impact on the electrical and mechanical components of the motor during startup, enhancing system reliability and extending the motor's lifespan. Additionally, variable frequency control reduces current fluctuations during equipment startup, which can affect the power grid and other devices. The VFD effectively minimizes the peak startup current to a low level.

5. Lowered the motor noise

According to the operating conditions of the motor, after installing variable frequency speed control, the motor's operating speed is significantly reduced, thereby effectively reducing the noise during motor operation.

Inverter operation principle:

Typically, a device that converts fixed voltage and frequency AC power into variable voltage or frequency AC power is called an "inverter." This equipment first converts three-phase or single-phase AC power into DC power (DC). It then transforms the DC power back into three-phase or single-phase AC power (AC). The inverter simultaneously adjusts both the output frequency and voltage, which alters the motor operating curve by shifting the n0 parallel downward. Therefore, an inverter can start motors with a lower starting current and achieve a higher starting torque, enabling it to start heavy loads.

Inverters feature basic functions such as voltage regulation, frequency adjustment, voltage stabilization, and speed control. Although their internal structure is complex, they are easy to use. Therefore, they are not only used for motor startup but are extensively applied across various fields. This includes a wide range of powers, shapes, sizes, and applications. With technological advancements and cost reductions, inverters are certain to gain even broader usage.

Feature Introduction:

1. Variable frequency control cabinet power switching and protection function

Variable frequency control cabinets are typically designed with circuit breaker components, which connect to the incoming power supply. They assist in the on/off operation of the cabinet's circuit and provide protection against short circuits or overloads in the circuit and variable frequency drive. Additionally, the variable frequency cabinet can disconnect the power during motor maintenance to ensure the safety of the operators.

2. Variable Frequency Drive Control Cabinet with Variable Speed Control Function

The control panel of the variable frequency control cabinet is equipped with potentiometers for variable speed adjustment, which can deliver instruction signals to the motor based on the operator's output frequency, controlling the motor's speed. Some products in the variable frequency control cabinet are set with an AC frequency switching function to ensure that in the event of a variable frequency inverter failure, the motor can be switched back to AC power source through an automatic control loop.

3. Intuitive control function of the variable frequency control cabinet

The control cabinet of the variable-frequency control cabinet is designed with display equipment and an operation panel, which is connected to the electrical components inside. It can directly display the operating status of the variable-frequency control cabinet, while conveniently allowing operators to control the operation of the variable-frequency unit and perform on-site operations for controlled devices such as motors.

The control cabinet of the variable frequency control cabinet is equipped with various instruments and indicator lights, such as voltmeters, ammeters, and frequency meters, as well as power indicator lights, alarm indicator lights, operating indicator lights, and power frequency indicator lights, etc. The operation and status of the variable frequency control cabinet can be directly reflected on the various instruments and indicator lights, enabling real-time monitoring of the variable frequency inverter's working condition.

4. Safety protection function of the variable frequency control cabinet

The variable frequency control cabinet integrates various electrical components, including variable frequency drives, within the cabinet. This design minimizes the impact of external environments on the components, reduces the degree of environmental pollution affecting them, and lowers the risk of electric shock for operators, thus offering excellent safety protection.

Technical Specifications:

1. Variable Frequency Drive Control Cabinet. Direct Start Control Cabinet

Control Motor Power: 0.37-15KW

Control Voltage: 380V

Number of pump units controlled: 1-4.

2. Variable Frequency Control Cabinet. Triangle Start

Control Motor Power: 15-90 kW

Voltage Control: 380V

Number of pump units controlled: 1-5 units.

3. Variable Frequency Control Cabinet. Automatic Pressure Reducing Start Control Cabinet

Control motor power: 15-160 kW

Control Voltage: 380V

Number of pump units controlled: 1-5 units.

4. Variable Frequency Control Cabinet. Fully Automatic Variable Frequency Speed Control Cabinet

Control Motor Power: 0.18-250KW; Control Voltage: 380V

Controlled motor units: 1-7 units;

Pressure control accuracy: ±0.02 MPa.

Terms of Use:

1. Power Supply: Mains power, self-provided grid, diesel generator set; 3-phase AC 380V, (-10%, +15%), 50Hz.

2. Applicable Motors: Generally squirrel-cage induction motors.

3. Starting Frequency: Can be started frequently; it is recommended not to exceed 20 times per hour.

4. Protection Grade: IP41 or IP20.

Environmental Conditions:

Altitude not exceeding 2,000 meters (use with reduced capacity above 2,000 meters), operating temperature between -25°C to +40°C, relative humidity not exceeding 95%, no condensation. Vibration less than 0.5G.

Application Range:

1. Constant pressure water supply control for industrial, residential, and fire protection applications.

2. Air conditioning cooling water circulating constant temperature and pressure control

3. City Square Music

4. Automatic water supply control for fountains.