ABB PSTB570-600-70 High-Current Soft Starter

The ABB PSTB570-600-70 is a robust soft starter for controlling large three-phase motors. It provides smooth acceleration and deceleration to reduce mechanical wear. This unit supports a broad main voltage range from 208 to 600 volts AC. The PSTB570-600-70 features a 115% service factor for demanding applications.

Product Identification & Key Ratings

• Brand: ABB
• Order Code: PSTB570-600-70
• Product ID / Article Code: 1SFA894017R7000
• Catalog Description: Softstarter - 570 A - 208 ... 600 V AC
• Rated Operational Current (Ie): 570 A (In-Line Connection)
• Rated Operational Power (Pe) at 400V: 315 kW (In-Line)
• Rated Operational Power (Pe) at 500V: 400 kW (In-Line)
• Main Circuit Voltage: 208 ... 600 V AC
• Control Supply Voltage (Us): 100 ... 250 V AC, 50/60 Hz
• Control Circuit Voltage (Uc): 24 V DC (for DC operation)
• Service Factor: 115%

Performance & Starting Characteristics

• Starting Capacity: 3 x Ie (1710A) for 15 seconds
• Ramp Time Adjustment: 1 to 120 seconds
• Initial Start Voltage: Adjustable from 30% to 70%
• Current Limit Function: Adjustable from 1.5xIe to 7xIe
• Step Down Voltage (Special Ramp): 100% down to 30%
• Starts Per Hour: 10 starts at 3.5xIe for 7s (50% duty cycle)
• Inside Delta Connection: Supported via internal switch
• Inside Delta Rated Current: 987 A (up to 540 kW @ 400V)
• Inside Delta Rated Power at 500V: 700 kW

Integrated Protection & Monitoring Features

• Overload Protection: Built-in Electronic Overload Relay
• Status LEDs: Green (Ready), Yellow (Protection), Red (Fault)
• Output Relays: Run, By-pass, Fault, and Overload Signal Relays
• Analog Outputs: Configurable for 0-10V, 0-20mA, or 4-20mA signal
• Communication: FieldBusPlug Standard (for network integration)

Electrical Connections & Physical Data

• Main Circuit Terminals: Copper Bars (IP00 degree of protection)
• Main Terminal Connection: Hole Diameter 12.5 mm, for 40x6 mm bar
• Main Circuit Tightening Torque: 45 N·m
• Control Circuit Connection: Rigid 1 x 2.5 mm² or 2 x 1.5 mm²
• Control Circuit Tightening Torque: 0.5 N·m
• Supply Circuit Connection: Rigid 1 x 2.5 mm²
• Unit Dimensions (H x W x D): 515 x 436 x 381 mm
• Net Weight: 52 kg

Environmental & Operational Limits

• Operating Temperature: 0°C to +50°C
• Storage Temperature: -25°C to +70°C
• Ambient Air Temperature: As per operating range
• Degree of Protection (Main Terminals): IP00 (IEC 60529)
• Standards: IEC 60947-1, IEC 60529, EN 60529

Installation & Mounting Guidelines

• Install the soft starter vertically in a well-ventilated industrial control panel.
• Maintain an ambient temperature below +50°C for optimal performance and lifespan.
• Use appropriate copper busbars (40mm x 6mm) for all main power connections.
• Apply the specified 45 N·m torque to all main terminal screws for a secure connection.
• Connect the control supply (100-250V AC) according to the wiring diagram.
• Select the desired connection mode (In-Line or Inside Delta) before applying power.
• Ensure adequate clearance around the unit for heat dissipation and maintenance access.

Packaging & Shipping Information

• Package Contents: 1 x ABB PSTB570-600-70 Soft Starter Unit
• Package Dimensions (L x W x H): 600 x 500 x 460 mm
• Gross Shipping Weight: 64 kg
• Shipping EAN: 7320500255650
• Shipping Methods: Freight service via FedEx, UPS, or DHL for heavy shipments.
• MOQ (Minimum Order Quantity): 1 piece

Certifications & Warranty

• Declaration of Conformity: CE Marked (1SFA1-76)
• Material Compliance: RoHS Declaration (1SFC132035D0201), CMRT
• WEEE Category: B2B, Large Equipment (External dimension >50cm)
• Warranty Period: 12 months standard warranty from delivery date.
• The warranty covers defects in materials and workmanship under normal use and installation.

Frequently Asked Questions (FAQ)

• What does a 115% service factor mean for this soft starter?

It means the soft starter can continuously handle a load current of 115% of its rated 570A (approximately 655.5A) without tripping, providing a safety margin for variable or unpredictable load conditions.

• How do I choose between In-Line and Inside Delta connection?

Use In-Line for standard applications up to 570A. Choose Inside Delta for motors with higher current draw (up to 987A) but lower voltage per winding, typically used with motors that have accessible winding connections.

• Can I monitor motor current remotely with this unit?

Yes, the configurable analog output (set to 4-20mA) provides a live signal proportional to motor current. You can wire this to a PLC, SCADA system, or panel meter for remote monitoring and data logging.

• Is an external bypass contactor required after start-up?

Not necessarily. While the unit has a built-in bypass signal relay to control an external contactor for energy saving, the internal thyristors can also remain in circuit. The bypass function helps reduce heat generation in the starter.

• What is the FieldBusPlug and which protocols are supported?

The FieldBusPlug is a slot for adding a communication module. You can choose modules for Profibus DP, Modbus RTU, DeviceNet, or Ethernet/IP to integrate the starter into your factory automation network.

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