Product Overview

The ABB PSTB1050-600-70 belongs to the PSTB series of softstarters. This device controls motor acceleration and deceleration for large industrial loads. The ABB PSTB1050-600-70 reduces mechanical stress on your equipment. You get a built-in electronic overload protection system. The softstarter supports both in-line and inside delta connections. The ABB PSTB1050-600-70 includes multiple signal relays for status monitoring.

Technical Specifications

The ABB PSTB1050-600-70 delivers reliable motor starting for high power applications. All parameters follow the official datasheet.

Power & Current Ratings

• Rated operational voltage: Main circuit 208 to 600 V AC

• Rated operational current in-line (Ie): 1050 A

• Rated operational current inside delta: 1810 A

• Rated operational power in-line at 400 V: 560 kW

• Rated operational power in-line at 500 V: 730 kW

• Rated operational power inside delta at 400 V: 1000 kW

• Rated operational power inside delta at 500 V: 1250 kW

• Service factor percentage: 100 percent

Control Supply

• Rated control supply voltage (Us): 100 to 250 V AC

• Rated control circuit voltage (Uc): 24 V DC operation

• Rated frequency: 50/60 Hz for both main and control circuits

Starting Performance

• Starting capacity at maximum rated current Ie: 3 x Ie for 15 seconds

• Ramp time: 0 to 120 seconds

• Initial voltage during start: 30 to 70 percent

• Step down voltage special ramp: 100 to 30 percent

• Current limit function: 1.5 to 7 x Ie

• Switch for inside delta connection: Yes

• Number of starts per hour at 3.5 x Ie for 7 seconds: 10 (50% ON time, 50% OFF time)

Protection & Monitoring

• Overload protection: Built-in electronic overload protection

• Integrated electronic overload: Yes

• Run signal relay: Yes

• By-pass signal relay: Yes

• Fault signal relay: Yes

• Overload signal relay: Yes

• Analog outputs: 0 to 10 V, 0 to 20 mA, 4 to 20 mA

LED Indicators

• Signal indication ready to start/standby ON: Green LED

• Signal indication protection: Yellow LED

• Signal indication fault: Red LED

Communication

• Communication: FieldBusPlug (standard)

Terminals & Connections

• Terminal type main circuit: Bars

• Connecting capacity main circuit: Hole diameter 12.5 mm, width and thickness 40 x 6 mm

• Tightening torque main circuit: 45 N·m

• Connecting capacity control circuit: Rigid 1 x 2.5 mm² or 2 x 1.5 mm²

• Connecting capacity supply circuit: Rigid 1 x 2.5 mm²

• Tightening torque control circuit: 0.5 N·m

• Tightening torque supply circuit: 0.5 N·m

• Degree of protection: Main terminals IP00 (acc. to IEC 60529, IEC 60947-1, EN 60529)

Environmental Specifications

• Ambient air temperature operation: 0°C to +50°C

• Ambient air temperature storage: -25°C to +70°C

Physical Dimensions

• Product net width: 436 mm

• Product net height: 515 mm

• Product net depth: 381 mm

• Product net weight: 60 kg

• Package level 1 width: 500 mm

• Package level 1 depth: 600 mm

• Package level 1 height: 460 mm

• Package level 1 gross weight: 72 kg

Installation Guide

Follow these steps to install the ABB PSTB1050-600-70 correctly.

1. Mount the softstarter vertically on a flat, non-combustible surface.

2. Ensure adequate ventilation around the unit for heat dissipation.

3. Connect main circuit bars using the 12.5 mm diameter holes with 45 N·m torque.

4. Wire the control supply at 100 to 250 V AC to the ABB PSTB1050-600-70.

5. Connect the 24 V DC control circuit for external signaling.

6. Set the initial voltage between 30 and 70 percent for your motor.

7. Configure the ramp time from 0 to 120 seconds as needed.

Packing List

This package for the ABB PSTB1050-600-70 includes the following items.

• ABB PSTB1050-600-70 softstarter unit (one piece)

• Product documentation and data sheet (1SFC132005C0201)

• Mounting hardware kit

• Terminal connection bars for main circuit

Frequently Asked Questions (FAQ)

1. What is the maximum current rating of the ABB PSTB1050-600-70?
The ABB PSTB1050-600-70 has a rated operational current of 1050 A for in-line connection. For inside delta connection, the rating increases to 1810 A.

2. What is the difference between in-line and inside delta connection?
In-line connection connects the softstarter directly in series with each motor phase. Inside delta connection places the ABB PSTB1050-600-70 inside the motor winding delta for higher current capacity.

3. Does the PSTB1050-600-70 have built-in overload protection?
Yes, the ABB PSTB1050-600-70 includes integrated electronic overload protection. This eliminates the need for separate overload relays.

4. What communication options does the ABB PSTB1050-600-70 support?
The ABB PSTB1050-600-70 comes with FieldBusPlug as standard. This allows connection to various fieldbus networks with appropriate plug-in modules.

5. What is the ambient temperature range for the ABB PSTB1050-600-70?
The ABB PSTB1050-600-70 operates from 0°C to +50°C. Storage temperature ranges from -25°C to +70°C for the unit.