Product Overview
The GE PSTB570-600-70 is a high-performance softstarter engineered for demanding industrial motor starting applications. With a rated operational current of 570 A and support for main circuits from 208 to 600 V AC, this module delivers reliable, controlled acceleration for large motors. Its robust design and comprehensive protection features make it a trusted choice for facilities seeking to minimize mechanical stress and electrical disturbances during startup.
Key Features & Benefits
The PSTB570-600-70 integrates advanced functionality to enhance motor control and system reliability:
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High Current Capacity: Handles up to 570 A (in-line) and 987 A (inside delta), suitable for heavy loads.
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Wide Voltage Range: Operates on 208–600 V AC main circuits, accommodating diverse electrical systems.
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Built-in Electronic Overload Protection: Prevents motor damage from overcurrent conditions.
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Flexible Starting Modes: Includes ramp time (0–120 s), initial voltage (30–70%), and current limit (1.5–7×Ie) for tailored starts.
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Multiple Relay Outputs: Run, bypass, fault, and overload signal relays for seamless integration with control systems.
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Analog Outputs: Provides 0–10 V, 0–20 mA, and 4–20 mA signals for monitoring and process control.
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IP00 Protection: Designed for installation in appropriate enclosures, complying with IEC 60529, IEC 60947-1, and EN 60529.
Technical Specifications
Below are the core specifications for the GE PSTB570-600-70 softstarter:
| Parameter |
Value |
| Rated Operational Voltage |
Main Circuit: 208–600 V AC |
| Rated Control Circuit Voltage (Uc) |
DC Operation: 24 V |
| Rated Frequency |
50/60 Hz |
| Rated Operational Power (In-Line) |
315 kW @ 400 V; 400 kW @ 500 V |
| Rated Operational Current (In-Line) |
570 A |
| Rated Operational Power (Inside Delta) |
540 kW @ 400 V; 700 kW @ 500 V |
| Rated Operational Current (Inside Delta) |
987 A |
| Service Factor |
115% |
| Starting Capacity |
3×Ie for 15 s |
| Ramp Time |
0–120 s (adjustable) |
| Initial Voltage During Start |
30–70% |
| Current Limit Function |
1.5–7×Ie |
| Analog Outputs |
0–10 V, 0–20 mA, 4–20 mA |
| Degree of Protection |
IP00 (main terminals) |
| Ambient Temperature (Operation) |
0 to +50 °C |
| Product Net Weight |
52 kg |
| Dimensions (W×H×D) |
436 mm × 515 mm × 381 mm |
Industry Applications
The PSTB570-600-70 excels in sectors where large motors require controlled starts and robust protection:
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Pumps and Compressors: Reduces water hammer and mechanical shock in high-inertia systems.
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Conveyors and Material Handling: Provides smooth acceleration to prevent product damage.
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HVAC and Refrigeration: Manage large fans and chillers efficiently.
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Mining and Aggregate: Handles heavy crushers and mills with high starting torque.
Its ability to operate in both in-line and inside-delta configurations offers flexibility for various motor connections.
Installation & Integration
When installing the GE PSTB570-600-70, ensure proper ventilation and clearance for heat dissipation. The main circuit uses bar terminals with a hole diameter of 12.5 mm and accepts bars up to 40×6 mm. Control and supply circuits accept rigid conductors up to 2.5 mm². Tighten main circuit connections to 45 N·m and control/supply circuits to 0.5 N·m. The unit includes a FieldBusPlug (standard) for communication integration, and its multiple relay outputs simplify interfacing with PLCs and SCADA systems.
Maintenance & Reliability
Regular inspection of the softstarter is essential for long-term performance. Check all power and control connections for tightness, verify that ambient temperature stays within the 0 to +50 °C operating range, and keep the unit free from dust and moisture. The built-in electronic overload protection reduces the risk of motor burnout, while the service factor of 115% allows for temporary overloads without tripping. Following a preventive maintenance schedule minimizes downtime and extends product life.
Selection & Purchasing Advice
When selecting the PSTB570-600-70, verify your motor's full-load current, voltage, and starting requirements to ensure compatibility. Confirm whether you need in-line or inside-delta wiring based on your motor configuration. For additional technical guidance, contact PLC Source PRO to confirm availability and lead times. This module meets CE requirements and is classified under ETIM EC000640 (soft starter).