PSTB1050-600-70 Softstarter | 1050A | ABB | PowergearX

Product Overview

• PSTB1050-600-70 is a high-performance softstarter from the trusted PSTB series.
• Rated for main circuits from 208 to 600 V AC, with a control supply of 110‑240 V AC.
• Massive 1050 A operational current (in-line) supports heavy motor loads.
• Built-in electronic overload protection enhances motor safety and reliability.
• Ideal for demanding industrial environments requiring smooth, controlled starts.

Key Technical Specifications

• Brand: ABB (PowergearX distribution)
• Model: PSTB1050-600-70
• Product ID: 1SFA894020R7000
• Rated operational voltage: 208‑600 V AC (main circuit)
• Control supply: 100‑250 V AC, 50/60 Hz
• In-line power (400 V): 560 kW
• In-line power (500 V): 730 kW
• Inside delta power (400 V): 1000 kW
• Inside delta current: 1810 A
• Starting capacity: 3x Ie for 15 seconds
• Current limit range: 1.5‑7x Ie
• Ramp time: 1‑120 seconds
• Initial voltage: 30‑70%
• Step-down voltage: 100‑30%
• Analog outputs: 0‑10 V, 0‑20 mA, 4‑20 mA
• Starts per hour: 10 (at 3.5x Ie, 7s on/off)
• Protection degree: IP00 (main terminals)
• Ambient temp (operation): 0 ‑ +50 °C
• Storage temp: -25 ‑ +70 °C
• Net weight: 60 kg | Gross weight: 72 kg
• Dimensions (W×H×D): 436×515×381 mm

Installation & Mounting Guidance

• Main circuit connection uses solid bars (hole Ø12.5 mm, 40×6 mm).
• Control circuit accepts rigid wires up to 2.5 mm² (1x) or 1.5 mm² (2x).
• Supply circuit terminal supports 2.5 mm² rigid wire.
• Torque specs: control 0.5 N·m, main 45 N·m, supply 0.5 N·m.
• Mount vertically with adequate ventilation; allow 100 mm clearance.
• Use only copper conductors rated for 75 °C minimum.

Commissioning & Maintenance Simplicity

• LED indicators: Ready (green), Protection (yellow), Fault (red).
• Relay outputs: Run, Bypass, Fault, Overload – all standard.
• FieldBusPlug (standard) enables easy communication setup.
• Simple parameter access via onboard controls or fieldbus.
• Routine checks: inspect terminals, clean dust, verify cooling.
• Fault diagnostics via LED blink codes (see manual).

Compatibility & Communication

• Works with standard 3‑phase AC induction motors.
• Supports inside delta connection (switchable).
• FieldBusPlug (standard) for PROFIBUS, DeviceNet, etc.
• Analog outputs interface with PLCs and SCADA.
• Control voltage: 100‑250 V AC (universal for most plants).

Certifications & Standards

• CE declaration (1SFA1-76) for European compliance.
• RoHS compliant (1SFC132035D0201).
• Conflict Minerals Reporting Template available.
• ETIM 7/8/9: EC000640 – Soft starter.
• eClass V11.0: 27370907; UNSPSC: 39121521.
• WEEE category: Large Equipment (B2B).

Package Contents & Logistics

• 1× PSTB1050-600-70 softstarter unit.
• Mounting hardware and terminal bars included.
• Quick start guide and product CD (digital access).
• Packaging: 500×600×460 mm, gross 72 kg.
• Shipping: 12‑24 hours dispatch via FedEx, UPS, or DHL.
• Warranty: 12 months from date of purchase.

Expert Review – Manager’s Insight

• “The PSTB1050 handles heavy starts with exceptional thermal management.”
• “Its inside-delta capability reduces line current by nearly 42% – a game changer.”
• “Fieldbus integration and analog I/O make it future‑ready for Industry 4.0.”
• “Reliable for pumps, fans, compressors, and conveyors in harsh sites.”

Applications & Suitable Equipment

• Pumps: centrifugal, submersible, and positive displacement.
• Fans & blowers: large HVAC, industrial exhaust.
• Compressors: screw and reciprocating types.
• Conveyors: belt, roller, and heavy‑duty material handling.
• Mixers & agitators: food, chemical, and mining.
• Crushers & mills: where high inertia loads are common.

Frequently Asked Questions (FAQ)

• Q: What is the maximum motor power for in-line connection?

  A: 560 kW at 400 V; 730 kW at 500 V.

• Q: Can I use this softstarter with a delta‑connected motor?

  A: Yes, inside delta connection is supported (switch built‑in).

• Q: How do I set the current limit?

  A: Use the front dial or fieldbus to adjust from 1.5 to 7x Ie.

• Q: Is external bypass contactor needed?

  A: No; the built‑in bypass relay handles it automatically.

• Q: What is the ambient temperature range for operation?

  A: 0 to +50 °C (derate above 40 °C).

• Q: How many starts per hour are allowed?

  A: 10 starts at 3.5x Ie for 7s with 50% duty cycle.

• Expert tip: For frequent starts, consider reducing the current limit to extend contactor life.
• Selection guide: Choose in‑line for standard motors; inside delta for high‑power savings and reduced line stress.

Contact & Order Information

• Email: sales@powergearx.com
• WhatsApp: +86 18030005825
• Order today – stock available for immediate dispatch.
• Bulk and OEM inquiries welcome.

Copyright © 2026 Powergear X Automation Limited. All rights reserved.
Original Source: https://www.powergearx.com/