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Brand: ABB
ABB PSTX250-600-70 Soft Starter 250 A 132 kW
Description
PSTX250-600-70: a 132 kW soft starter in a 15.5 kg housing
PSTX250-600-70 is a 250 A soft starter for motors of about 132 kW at 400 V or 160 kW at 500 V. ABB gives 75 to 250 hp for the UL and CSA voltage steps and a full-load figure of 248 A, and states a net weight of 15.5 kg (34.2 lb).
The same 15.5 kg net weight in the table is given for the PSTX300 and the PSTX370, so the PSTX250 is the lowest rating at that weight. Large pumps and compressors are among the loads such a soft starter is chosen for.
Technical specifications
| Parameter | Specification |
|---|---|
| Type designation / order code | PSTX250-600-70 / 1SFA898113R7000 |
| Motor power IEC (400 V / 500 V) | 132 kW / 160 kW |
| Rated current Ie | 250 A |
| UL/CSA power (200/208, 220/240, 440/480, 550/600 V) | 75 / 100 / 200 / 250 hp |
| Full-load amps (FLA) | 248 A |
| Net weight | 15.5 kg (34.2 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 |
Protection and diagnostics for large motors
The protection list is long: locked rotor, current underload, current and voltage imbalance, over and under voltage, power-factor underload, earth fault with 0.1 to 1.0 second time, phase reversal, bypass open, thyristor overload and heat-sink over-temperature. A PTC input switches at 2825 ohm and resets at 1200 ohm (both with plus or minus 20 percent).
Warnings can be enabled before a trip, including a thyristor overload warning, a faulty fan warning and a motor runtime limit. This helps with planned maintenance of large drives.
Starting duty and environment
The rated overload capability is 4 x Ie for 10 seconds, normal start class 10, with 10 starts per hour for sizes up to PSTX370 at 50 percent on-time. Operation is rated from -25 to +60 C, with current derating of 0.8 percent per C above 40 C, and up to 4000 m with altitude derating.
In a hot switch room, size the unit with that derating in mind and check the panel ventilation. The built-in bypass closes at top of ramp, which cuts heat in the cabinet compared with a non-bypassed soft starter.
Documents and quotation
The linked file is the ABB softstarter catalog 1SFC132012C0201 – PSTX series pages (extract). Seven Star LLC supplies the PSTX250-600-70 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 PSTX250-600-70 Soft Starter 250 A 132 kW
Answers from our engineering team on installation, compatibility and integration.
01What is the rated current of the PSTX250-600-70?
250 A, with a full-load figure of 248 A for UL and CSA.
02What motor power does it suit?
132 kW at 400 V and 160 kW at 500 V.
03How heavy is it?
15.5 kg (34.2 lb).
04How many starts per hour does ABB allow?
10 per hour at 50 percent on-time for sizes up to PSTX370, class 10.
05Is a bypass contactor built in?
Yes, the bypass is built into every PSTX soft starter.
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