5.5KW General Purpose Variable Frequency Drive

Compared to the lower-power model, the 5.5KW General Purpose Variable Frequency Drive features comprehensive enhancements in heat dissipation structure, overload capacity, and terminal interfaces. It easily handles heavy-load starts and harsh industrial environments, making it an ideal core for improving production efficiency and achieving energy savings.

Heavy-load vector control, worry-free overload: Supports 150% high overload capacity (60 seconds), perfectly matching the high torque requirements of the 5.5KW motor at startup. Whether restarting a mixer after a material jam or starting the elevator under full load, it provides strong starting torque, completely solving the problem of tripping due to insufficient power.

Industrial-grade structural design, upgraded heat dissipation: Utilizing an optimized independent airflow design and a reinforced heat sink to address the heat generated by the 5.5KW power output, it effectively isolates dust and electronic components, preventing overheating alarms caused by poor heat dissipation and ensuring stable 24/7 continuous operation in high-temperature environments.

Full-featured expansion and high integration: Standard RS-485 communication interface (Modbus-RTU protocol), supporting multi-pump cycle control, PID constant pressure water supply, and easy PLC programming. The 5.5KW model has a richer I/O port configuration, eliminating the need to purchase an additional controller to directly build complex automated control systems.

Built-in braking unit for rapid response: Models of 5.5KW and below have a built-in braking unit (requires an external resistor). For machinery requiring rapid shutdown or frequent forward and reverse rotation, it effectively suppresses pump voltage rise and prevents inverter failure.

Product Technical Parameters

3.7-7.5KW System Chassis Specification Table

Application industries and scenarios

The 5.5KW General Purpose Variable Frequency Drive, with its robust power and high reliability, is widely used in the following medium-sized industrial fields:

Fluid Control: Medium and large-scale constant pressure water supply systems, central air conditioning circulating water pumps, cooling tower fans.

Machinery Manufacturing: CNC machine tool spindle drives, injection molding machines, extruders, textile machinery.

Material Conveying: Belt conveyors, elevators, mixers, crushers.

Environmental Protection Equipment: Wastewater treatment aerators, dewatering machines.

Precautions

Strictly Prohibit Shared Grounding: Absolutely avoid sharing a grounding electrode with large electrical equipment such as welding machines and power machinery. The grounding wire should be as thick and short as possible.

Long-Line Transmission: If the distance between the frequency converter and the motor exceeds 50 meters, the carrier frequency must be reduced (F0-15) or an output reactor must be installed to prevent damage to the motor insulation.

Dust Prevention: Although the 5.5KW model has good heat dissipation, in high-dust environments (such as textile mills and wood processing plants), it is recommended to install a protective net or install it in a separate electrical cabinet.

FAQ

Q1: Can a 5.5kW frequency inverter drive a 7.5kW motor?

A: Not recommended. The TES-390 5.5kW frequency inverter has a rated output current of 25A, while the rated current of a 7.5kW motor is typically around 15A-17A (depending on voltage). Although the currents seem matched, the inverter's capacity margin is designed for a 5.5kW motor. Forcing a 7.5kW motor to drive it can easily cause the inverter to trigger its **overcurrent (OC) or overload (OL)** protection during startup or heavy load operation. Please always follow the selection principle of "inverter power ≥ motor power".

Q2: Does a 5.5kW model require an external braking resistor?

A: If your equipment does not require rapid stopping or potential energy loads (such as hoists), a braking resistor is usually not needed. However, if the equipment has a large inertia, requires a short stopping time, or involves energy feedback, a braking resistor must be connected; otherwise, the inverter will report an **overvoltage (OV)** fault.

Q3: What are the differences in heat dissipation between the 5.5KW and 0.75KW models?

A: The 0.75KW model mainly relies on natural convection for heat dissipation, while the 5.5KW model generates significantly more heat. Therefore, the 5.5KW model comes standard with a high-power cooling fan, and it is recommended to use an independent air duct design to isolate the heat-generating components from the control circuit, ensuring stable operation even in high-dust industrial environments.

Q4: How to solve the electromagnetic interference problem when the 5.5KW motor is running?

A: Long 5.5KW cables are prone to generating electromagnetic radiation that interferes with communication equipment. Recommendations: 1. Run power lines and control lines in separate cable trays; 2. Use shielded cables for control lines; 3. Install an input reactor or EMC filter at the inverter input (recommended in section 4.9 of the document).