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Brand: ABB
ABB PSTX30-600-70 Soft Starter 30 A 15 kW 600 V
Description
PSTX30-600-70, the entry size of ABB’s advanced soft starter range
PSTX30-600-70 is the smallest unit in the PSTX range in its 600 V version. ABB lists it for 15 kW at 400 V and 18.5 kW at 500 V, with a rated current of 30 A and a full-load figure of 28 A for UL and CSA applications.
In the catalogue ordering table the ordering table gives it the same 4.6 kg net weight as the PSTX37, PSTX45 and PSTX60. The mounting dimensions are not repeated on this page, so take them from the product documentation before you cut a panel.
Technical specifications
| Parameter | Specification |
|---|---|
| Type designation / order code | PSTX30-600-70 / 1SFA898103R7000 |
| Motor power IEC (400 V / 500 V) | 15 kW / 18.5 kW |
| Rated current Ie | 30 A |
| UL/CSA power (200/208, 220/240, 440/480, 550/600 V) | 7.5 / 10 / 20 / 25 hp |
| Full-load amps (FLA) | 28 A |
| Net weight | 4.6 kg (10.1 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 |
What the PSTX30 does during starting and stopping
The PSTX family offers soft start with voltage ramp, soft start with torque control, current limit in three forms (standard, dual and ramp), full voltage start and torque limit between 20 and 200 percent. For stopping it adds a voltage-ramp stop and a torque-control stop, which ABB mentions as a way to reduce water hammer in pump lines.
For a 15 kW pump or fan the typical choice is the torque-control ramp. It gives a nearly linear torque build-up and avoids the current peaks of direct starting. A built-in bypass contactor closes at top of ramp, so the thyristors stop dissipating heat once the motor is at speed.
Protection, signalling and communication
The electronic overload protection is user defined between class 10A, 10, 20 and 30. The protection list in the catalogue also includes locked rotor, current underload (useful against a pump running dry), current and voltage imbalance, earth fault, phase reversal, bypass open and PTC or PT100 motor temperature inputs.
Communication starts with built-in Modbus RTU on the RS485 terminals. Anybus modules can add PROFINET, PROFIBUS, EtherNet/IP and others; for example the AB-PROFINET-IO-2 module is listed under 1SFA899300R1010. Two inputs (start and stop) are fixed and three more are programmable.
Documents and quotation
The linked file is the ABB softstarter catalog 1SFC132012C0201 – PSTX series pages (extract). Seven Star LLC supplies the PSTX30-600-70 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 PSTX30-600-70 Soft Starter 30 A 15 kW 600 V
Answers from our engineering team on installation, compatibility and integration.
01What is the rated current of the PSTX30-600-70?
30 A, with a full-load figure of 28 A for UL and CSA, per the ABB catalogue.
02What motor power is it for?
15 kW at 400 V and 18.5 kW at 500 V; 7.5 to 25 hp depending on the UL/CSA voltage.
03Does it have a built-in bypass?
Yes, the bypass contactor is built in, which saves panel space and reduces heat after start.
04What control supply does it need?
100 to 250 V AC, 50/60 Hz, with an internal or external 24 V DC control circuit.
05Is Modbus included?
Built-in Modbus RTU is standard; other fieldbus protocols use Anybus modules.
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