ABB ACS355-03E-04A1-4 Machinery Drive 1.5 kW 4.1 A

Frame R1 ACS355 rated 4.1 A

Machine building with a 1.5 kW motor on 400 V? ACS355-03E-04A1-4 offers 4.1 A of output current in frame R1 with a base of 70 x 161 mm. At 1.5 kW it covers common conveyor, metering-pump and small fan motors in a housing that is only 70 mm wide.

ABB describes the ACS355 as the micro drive of its machinery range, with a safe torque off function (SIL3) as standard, sensorless vector control for induction and permanent magnet motors up to 599 Hz, and a built-in braking chopper. More ratings are in the AC drives category, and a sister page covers the ABB ACS355 machinery drive.

Technical specifications

Selection notes for 1.5 kW on frame R1

Continuous current of 4.1 A with a 50% overload (6.1 A) for 60 seconds every 10 minutes is the rated envelope. At start the drive may deliver 1.8 times nominal current for 2 seconds. Ambient temperature is -10 to 40 degrees C, or 50 degrees C with 10% derating; above 1000 m derate 1% per 100 m.

Protect with 16 A gG fuses or 15 A Class T. The drive dissipates 69 W, so ventilate for 13 m3/h. Chokes: CHK-02 on the input side, ACS-CHK-C3 on the output side. Filter: RFI-32. Keep 75 mm clear above and below the unit.

Ordering code and enclosure options

An order starts with ACS355-03E-04A1-4: ACS355 series, 03 for three phases, E for the connected EMC filter at 50 Hz, 04A1 for the rating and 4 for 380 to 480 V. Add +J400 to get the ACS-CP-A assistant control panel or +J404 for the ACS-CP-C basic panel.

In IP20 / UL Open form frame R1 measures 169 x 70 x 161 mm and weighs 1.2 kg. With the NEMA 1 / UL Type 1 kit it measures 257 (to 280 with the hood) x 70 x 169 mm and weighs 1.6 kg. An IP66 / IP67 / UL Type 4X variant (+B063) is listed for this rating on frame R1.

Matching the drive to a 1.5 kW motor

A 1.5 kW nameplate covers motors with different efficiency classes, pole numbers and service factors, so the deciding figure is the motor full-load current at your supply voltage. If it is at or below 4.1 A, this rating fits; if the motor is a high-pole-count or older design with a higher current, look at the next rating up. Consider the load profile too. Metering pumps and conveyors that restart under load lean on the 2-second start boost and the one-minute overload, while centrifugal fans rarely need them once the ramp time is set sensibly.

Think about stopping as well. A conveyor that must stop quickly with a heavy load will regenerate energy into the drive, which the built-in braking chopper can handle when paired with a correctly sized resistor as described in the ABB catalog. For safety-related stops, plan the wiring of the safe torque off input as part of the machine risk assessment rather than relying on a normal stop command.

Mounting and wiring practice

Fit the drive vertically on the back plate, respect the stated clearances and keep the warm air from the drive away from heat-sensitive devices mounted above it. Use screened motor cable with 360-degree termination of the screen at the gland where ABB recommends it, separate control cables from power cables, and fit the fuses listed above. Check that the motor insulation is suitable for inverter supply, particularly on older motors being retrofitted to variable speed.

First start and tuning

After a final check of supply voltage and wiring, power up and enter the motor data from the nameplate. Choose scalar or vector control to suit the application, run an identification where the mechanics allow, and confirm rotation direction with the load uncoupled or at low speed. Tune ramps and speed limits, test each control source, verify fault reset behaviour and prove the safe torque off function. Back up the parameters to the control panel or a PC tool.

Running in Oman’s climate

The ambient limits and derating rules stated above matter in the Gulf, where panel interiors in summer can exceed the outside air temperature. With 69 W per drive, a cabinet holding several ACS355 units needs proper ventilation or cooling, and the derating at higher temperatures should be included in the sizing if the cabinet cannot be kept cool. Wind-blown sand and cement or process dust clog heatsinks and fans, so fit filtered air inlets and service them regularly. On humid coastal sites, avoid condensation inside the enclosure by keeping it sealed and conditioned, and watch for corrosion on terminals and earth connections.

Maintenance schedule

Set a routine for cleaning cooling paths, checking the fan, tightening power connections and reviewing fault history. Recurring overtemperature trips usually indicate blocked airflow or a hot cabinet, while repeated overcurrent faults suggest a mechanical problem in the driven machine.

Catalogue and quotation

Numbers on this page come from ABB’s ACS355 catalog 3AUA0000068569, which opens from the document link. To obtain a price for the ACS355-03E-04A1-4, send Seven Star LLC the motor data, voltage and communication needs; availability and lead time are stated in the quotation.

Before ordering, verify the full type code, panel option and motor current, and the ambient temperature and altitude at the installation.