ABB PSTB1050-600-70 Heavy-Duty Soft Starter

The ABB PSTB1050-600-70 is a powerful motor soft starter for industrial applications. This unit controls large three-phase motors smoothly to reduce mechanical stress. It handles a wide main circuit voltage range from 208 to 600 volts AC. The PSTB1050-600-70 offers versatile control with multiple ramp and protection features.

Primary Identification & Ratings

• Brand: ABB
• Order Code: PSTB1050-600-70
• Product ID / Article Code: 1SFA894020R7000
• Catalog Description: Softstarter - 1050 A - 208 ... 600 V AC
• Rated Operational Current (Ie): 1050 A (In-Line Connection)
• Rated Operational Power (Pe) at 400V: 560 kW (In-Line)
• Rated Operational Power (Pe) at 500V: 730 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)

Advanced Performance & Start Characteristics

• Starting Capacity: 3 x Ie (3150A) 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)
• Service Factor: 100%
• Inside Delta Connection: Supported via internal switch
• Inside Delta Rated Current: 1810 A (up to 1000 kW @ 400V)

Integrated Protection & Monitoring

• Overload Protection: Built-in Electronic Overload Relay
• Status LEDs: Green (Ready), Yellow (Protection), Red (Fault)
• Output Relays: Run Signal, By-pass Signal, Fault Signal, Overload Signal
• 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: 60 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

Installation & Mounting Guidelines

• Mount the soft starter vertically on a solid, flat surface in a clean, ventilated cabinet.
• Ensure the ambient temperature does not exceed +50°C during operation.
• Use proper copper busbars (40mm x 6mm) for main power connections.
• Apply the specified 45 N·m torque to all main terminal screws.
• Connect the control supply (100-250V AC) and 24V DC control circuit as required.
• Select the correct connection mode (In-Line or Inside Delta) using the internal switch.
• Allow sufficient clearance around the unit for heat dissipation and cable routing.

Packaging & Shipping Information

• Package Contents: 1 x ABB PSTB1050-600-70 Soft Starter Unit
• Package Dimensions (L x W x H): 600 x 500 x 460 mm
• Gross Shipping Weight: 72 kg
• Shipping EAN: 7320500255681
• Shipping Methods: Freight service via FedEx, UPS, or DHL for heavy cargo.
• 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.
• Warranty covers defects in materials and workmanship under normal operating conditions.

Frequently Asked Questions (FAQ)

• What is the main advantage of the "Inside Delta" connection?

Inside Delta connection allows the soft starter to handle motors with a higher current rating (up to 1810A) using the same 1050A thyristors, effectively increasing its power range without a larger physical unit.

• Can I control this soft starter from a PLC over a network?

Yes, the integrated FieldBusPlug allows you to add a communication module (e.g., Profibus DP, Modbus RTU, Ethernet) for start/stop commands, parameter setting, and monitoring from a PLC or SCADA system.

• Does the built-in electronic overload protection replace a separate overload relay?

Yes, it provides comprehensive motor overload protection, eliminating the need for an external thermal or electronic overload relay in most standard applications, simplifying your panel design.

• Why are the main terminals rated IP00?

IP00 means no protection against touch or ingress. This unit is designed to be installed inside a protected, enclosed control panel (which should have a proper IP rating like IP54) where only qualified personnel have access.

• What is the purpose of the analog output?

The configurable analog output (4-20mA is most common) can be wired to a meter or PLC to provide a live signal proportional to motor current, allowing for remote power monitoring and process control.

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Original Source: https://www.ubestplc.com/
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