ACH550-01-038A-4

What type of equipment is this?

This is an ABB ACH550 series frequency converter, also known as an inverter drive or variable frequency drive. It is used to control the speed and torque of three-phase AC motors, particularly in building services and HVAC applications.

What motor power rating is this drive suitable for?

It is rated for a typical motor power of 18.5 kW, making it suitable for medium-sized motor control applications such as fans, pumps and air-handling equipment.

What supply voltage does this drive use?

The drive is designed for a three-phase mains supply from 380 to 480 V AC, with a stated tolerance of +10% / -15%. It is intended for standard industrial and commercial low-voltage motor systems.

What is the rated output current?

The rated output current is 38 A. The ACH550-01-038A-4 also allows short-term overload of 110% for 1 minute every 10 minutes across the speed range.

Is this drive intended for HVAC use?

Yes. The ACH550 family is designed for HVAC and building automation duties, including speed control of fans, pumps and other motor-driven plant. It includes HVAC-focused control features and commonly used building communication protocols.

What frame size is this model?

This model is an R3 frame size drive. In the IP21 / UL Type 1 configuration, the datasheet dimensions for the drive body are 583 mm high, 203 mm wide and 231 mm deep, with a listed weight of approximately 16 kg.

What enclosure rating does the standard version have?

The standard wall-mounted version is IP21 / UL Type 1. An IP54 / UL Type 12 variant may be identified by the +B055 option code, but that is a different configuration from the base unit.

What communications are built in?

The ACH550 series includes RS-485 communication as standard, with protocols such as BACnet MS/TP, Modbus RTU, N2 and FLN. This makes it suitable for integration into many building management systems.

What input and output connections are available?

The drive provides 2 analogue inputs, 2 analogue outputs, 6 digital inputs and 3 relay outputs. These connections allow integration with sensors, setpoint signals, run commands, status indications and control circuits.

What output frequency range can it provide to the motor?

The motor output frequency range is 0 to 500 Hz, allowing flexible speed control for compatible three-phase AC motors when correctly selected and parameterised for the application.

What operating temperature range is specified?

The operating ambient temperature range is -15 to 50 °C, with no frost permitted. Rated output current is available up to 40 °C, with current derating above that temperature.

What protective functions are included?

The drive includes functions such as overvoltage control, undervoltage control, earth-leakage supervision, motor short-circuit protection, overcurrent protection, phase-loss detection, underload supervision, overload supervision and stall protection.