ABB ABB ACS55
ABB ACS55 micro frequency drives with single-phase supply for three-phase asynchronous motors from 0.18 to 2.2 kW, mountable on a 35 mm DIN rail or on a wall.
The ACS55 is a compact ABB drive that controls the speed of a three-phase asynchronous motor and is configured with DIP microswitches and three potentiometers, without a control panel. The user's manual presents it for pumps and fans (quadratic U/f curve, the factory setting) or for constant-torque loads, with the speed reference on the analogue input 0/2…10 V or 0/4…20 mA.
The type is read in the form ACS55-01_-____-_: the letter E indicates the integrated EMC filter, N its absence; the group of four characters is the maximum continuous output current (for example 04A3 for 4.3 A), and the last digit is the supply voltage: 1 for 110–120 V a.c. and 2 for 200–240 V a.c. For a quotation, send the full type from the nameplate; we confirm the code and availability in the quotation.
Models and codes
| Code | Note |
|---|---|
| ACS55-01E-01A4-2 | 200–240 V supply, 0.18 kW, output current 1.4 A, input current 4.4 A, size A; gG fuse 10 A. |
| ACS55-01E-02A2-2 | 200–240 V supply, 0.37 kW, 2.2 A, input current 6.9 A, size A; gG fuse 16 A. |
| ACS55-01E-04A3-2 | 200–240 V supply, 0.75 kW, 4.3 A, input current 10.8 A, size B; gG fuse 16 A. |
| ACS55-01E-07A6-2 | 200–240 V supply, 1.5 kW, 7.6 A, input current 18.2 A, size D (C without EMC filter); gG fuse 25 A. |
| ACS55-01E-09A8-2 | 200–240 V supply, 2.2 kW, 9.8 A, input current 22.0 A, size D (C without EMC filter); gG fuse 32 A. |
| ACS55-01E-01A4-1 | 110–120 V supply, 0.18 kW, 1.4 A, input current 6.4 A, size A; gG fuse 10 A. |
| ACS55-01E-02A2-1 | 110–120 V supply, 0.37 kW, 2.2 A, input current 9.5 A, size A; gG fuse 16 A. |
Key specifications
| Continuous motor power | 0.18 – 2.2 kW |
|---|---|
| Single-phase supply voltage | 200–240 V (+10/-15 %) or 110–120 V (+10/-15 %) |
| Continuous output current | 1.4 – 9.8 A |
| Maximum output current (1 minute) | 2.1 – 14.7 A |
| Switching frequency | 5 (maximum 16, from the SILENT switch) kHz |
| Nominal motor frequency | 50 or 60 Hz, from the DIP switch; HI FREQ mode adds up to 70 Hz |
| Degree of protection | IP20 |
| Operating temperature | -20 … +40 at rated load; +50 °C with 85 % of I2; +55 °C with 75 % of I2 °C |
| Installation altitude | 0 – 2000 m (above 1000 m, Pn and I2 drop by 1 % for every 100 m) |
| Mounting | 35 mm DIN rail or wall (M4 screws) |
| Weight (with EMC filter) | 0.65 – 1.7 kg |
| Analogue reference input | 0/2…10 V DC or 0/4…20 mA |
The ABB ACS55 user's manual (3AFE68929300) is revision C of 12.04.2010, the edition that ABB's official library provides for this code; for an installed unit, we confirm the available variant in the quotation based on the type on the nameplate.
Frequently asked questions
What do E and N mean in the code ACS55-01E and ACS55-01N?
According to the manual, the letter E indicates the integrated EMC filter and N indicates the variant without a filter. The frame size differs at 1.5 and 2.2 kW: D with integrated filter, C without filter. For a replacement, it helps if you send the full type from the nameplate.
How is the motor current set?
With the MOTOR I NOM potentiometer, as a percentage of the drive's rated current; the manual gives the formula (motor rated current divided by ACS55 rated current, multiplied by 100 %) and a selection chart for each type. The value is the basis of the motor's thermal protection.
What data do I send for a quotation?
The full type from the nameplate, or the motor power and current, the supply voltage (110–120 V or 200–240 V) and the load type. When ordering, the lead time is usually 1–4 weeks; we confirm availability and the exact lead time in the quotation.
Other ABB series
The page uses the 2010 user's manual (revision C); the maximum motor cable lengths for EMC compliance, dimensions and availability are confirmed to you by code, from the manufacturer's documentation.
Updated: 2026-11-12