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Brand: ABB
ABB PSTX72-600-70 Soft Starter 72 A 37 kW 600 V
Description
PSTX72-600-70: a 37 kW class soft starter with torque control and built-in bypass
PSTX72-600-70 is a three-phase soft starter from the PSTX advanced range, rated 72 A. The ABB table gives 37 kW at 400 V, 45 kW at 500 V, 20 to 60 hp for the UL and CSA voltages, and a full-load figure of 68 A.
The unit weighs 4.7 kg (10.4 lb), together with the PSTX85 and PSTX105 in the same weight group. That puts it in the mid-size band that covers many pumps, compressors and conveyors in the 30 to 55 kW area.
Technical specifications
| Parameter | Specification |
|---|---|
| Type designation / order code | PSTX72-600-70 / 1SFA898107R7000 |
| Motor power IEC (400 V / 500 V) | 37 kW / 45 kW |
| Rated current Ie | 72 A |
| UL/CSA power (200/208, 220/240, 440/480, 550/600 V) | 20 / 25 / 50 / 60 hp |
| Full-load amps (FLA) | 68 A |
| Net weight | 4.7 kg (10.4 lb) |
| Device type | Three-phase soft starter, PSTX advanced range, in-line connection, built-in bypass |
| Rated operational / insulation voltage | Ue 208-600 V (this -600 type); Ui 690 V; 50/60 Hz |
| Control supply Us / control circuit Uc | 100-250 V AC, 50/60 Hz / internal or external 24 V DC |
| Starting capacity / starts per hour | 4 x Ie for 10 s / 10 per hour for PSTX30 to PSTX370 (class 10, 50 % on-time) |
| Overload / ambient | Electronic overload, class 10 default (10A, 10, 20 or 30 selectable) / -25 to +60 C, derate 0.8 % per C above 40 C |
| Altitude / protection | Up to 4000 m with derating above 1000 m / IP20 supply and control circuit; fan cooled, thermostat controlled |
| Keypad / communication | Detachable graphical LCD keypad, IP66; built-in Modbus RTU (RS485); Anybus and ABB fieldbus plug options |
Where a 37 kW soft starter is used
Typical uses include centrifugal pumps, fans, compressors and conveyors where a star-delta starter produces a torque jump or direct starting stresses the network. ABB describes a pump cleaning function that can reverse flow to clear pipes and a stand-still brake and dynamic brake for stopping.
The thermal reserve is stated as 4 x Ie for 10 seconds at normal start (class 10) with up to 10 starts per hour at 50 percent on-time. Above 40 C ambient the rated current is reduced by 0.8 percent per degree, up to 60 C, and ABB gives a derating formula for altitudes above 1000 m.
Control, display and options
The graphical LCD keypad is detachable, rated IP66, and supports languages including Arabic and English. Three signalling LEDs report ready, run, fault and protection, and the unit includes an event log and a real-time clock that holds the time for 48 hours without power.
An analog output can report motor current, power, energy, cos phi or motor temperature on 0-10 V or 4-20 mA. Extension I/O modules such as the DX111-FBP.0 (1SAJ611000R0101, 24 V DC) are available as accessories.
Documents and quotation
The linked file is the ABB softstarter catalog 1SFC132012C0201 – PSTX series pages (extract). Seven Star LLC supplies the PSTX72-600-70 on request from Muscat as an independent supplier; availability and lead time are given in the quotation. More products of this kind are in the Motor Soft Starters category, and a related item is the ABB AF09-30-10-11 contactor.
Confirm before ordering: motor kW and full-load current, line voltage (208-600 V for this type), start duty and starts per hour, the control supply on site and whether a fieldbus module is needed.
Datasheets & Documents
- Catalogue extract ABB softstarter catalog 1SFC132012C0201 - PSTX series pages (extract) Download
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About brand
ABB is the Swiss-Swedish engineering group for electrification and automation: low voltage drives, motors, circuit breakers and motor control, process instruments and analysers, control systems and robots. It was formed on 5 January 1988 by the merger of two older companies. ASEA was founded in Västerås, Sweden, in 1883 by Ludvig Fredholm to make electric lighting and generators. BBC Brown Boveri was founded in Baden near Zurich in 1891 by Charles E. L. Brown and Walter Boveri. ABB Ltd is incorporated in Switzerland, headquartered in Zurich and listed on the SIX Swiss Exchange and Nasdaq Stockholm.
ABB company profile
| Formed | 5 January 1988, by the merger of ASEA (Sweden) and BBC Brown Boveri (Switzerland), each holding 50% |
|---|---|
| ASEA | Founded 1883 in Västerås, Sweden, by Ludvig Fredholm; first products electric lighting and generators |
| Brown, Boveri & Cie | Founded 1891 in Baden, Switzerland, by Charles E. L. Brown and Walter Boveri |
| Headquarters | Zurich, Switzerland; ABB Ltd became the group holding company in 1999 |
| Ownership | Public company listed on SIX Swiss Exchange and Nasdaq Stockholm |
| Brands in the group | Baldor (US motors, acquired 2011), B&R (machine automation, acquired 2017), K-TEK level instruments, Endura and Navigator analysers, SACE breakers |
| Product families | Low and medium voltage drives (ACS series), motors, SACE Tmax and Emax breakers, contactors and soft starters, flow, pressure, temperature and level instruments, liquid and gas analysers, Contrac actuators, AC500 PLCs, Ability System 800xA and S800 I/O, protection relays, robots |
Milestones
- 1883: ASEA is founded in Västerås, Sweden.
- 1891: Brown, Boveri & Cie is founded in Baden, Switzerland.
- 1987–1988: The merger is announced on 10 August 1987; ABB Asea Brown Boveri starts operating on 5 January 1988.
- 1999: ABB Ltd, incorporated in Switzerland, becomes the single holding company of the group.
- 2011 and 2017: Baldor Electric and B&R join ABB.
- 2020: ABB sells its power grids business to Hitachi, focusing on electrification, motion, process and machine automation.
Choosing an ABB drive
ABB's ACS drive codes are easy to read once you know the pattern. In ACS580-01-046A-4, "ACS580" is the drive family, "01" means a wall-mounted single drive, "046A" is the rated output current (about 46 A) and "-4" means a 380–480 V supply. The family is chosen by application: ACS355 for compact machinery, ACS310 for simple pumps and fans, ACS580 as the general-purpose drive, ACQ580 for water and wastewater with pump functions such as pipe fill and dry-run protection, and ACS880 for heavy industrial duty with direct torque control. Size the drive on the motor's full-load current, not only its kW rating, and allow derating for the high ambient temperatures common in Gulf electrical rooms.
Where ABB products are used
In Oman and the GCC, ABB drives and motors run pumps, fans and compressors in water and wastewater plants, district cooling, oil and gas and industry. ABB flowmeters, level instruments and analysers are used in water utilities, power and desalination plants and refineries, and SACE breakers protect switchboards in buildings and plants.
ABB products we list
| Family | Examples |
|---|---|
| AC drives | ACS580, ACS580-01-046A-4, ACQ580, ACS355, ACS310, ACS880-01, FEN-31 encoder module |
| Breakers, motor control and protection | SACE Tmax XT, XT3N 250, SACE Emax 2, AF09 contactor, PSR soft starter, REM615 relay |
| Flow measurement | ProcessMaster FEP300, AquaMaster4, CoriolisMaster FCB430, VortexMaster FSV430, SwirlMaster FSS430, OriMaster FPD500 |
| Pressure, temperature and level | 266DRH, 267CS multivariable, TTH300, K-TEK AT100, LMT200, MT5000 GWR, KM26 gauge |
| Analysers | Endura AZ20, AK100 hydrogen purity, Navigator AW641 silica, AW402 chlorine, AWT210 |
| Control systems and actuators | AC500, AC500-S, S800 AI810, AC 800F SA 811F, Contrac RSD50, Contrac RHD4000 |
Ordering ABB products: what we need
Send the full type code from the nameplate (for example ACS580-01-046A-4 or 266DSH...) and, for spare parts, the ABB ID number (such as 3BSE008508R1 or 1SBL176001R3010). For drives, add the motor power and current and any option codes (+...). For instruments, send the complete order code, which sets range, materials and approvals. Baldor motors are listed on their own brand page.
Facts checked against ABB company filings and published histories of ASEA and Brown, Boveri & Cie, October 2026.
FAQ
Questions about the ABB PSTX72-600-70 Soft Starter 72 A 37 kW 600 V
Answers from our engineering team on installation, compatibility and integration.
01What is the rated current of the PSTX72-600-70?
72 A, with a full-load figure of 68 A for UL and CSA.
02How much does it weigh?
4.7 kg (10.4 lb) according to the ABB ordering table.
03Which voltage range does this type cover?
Rated operational voltage 208 to 600 V; the PSTX72-690-70 covers 208 to 690 V.
04Can it start with torque control?
Yes, torque-control start and stop are standard PSTX functions.
05Does it include overload protection?
Yes, an electronic overload with selectable class 10A, 10, 20 or 30.
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