Product Overview

The ABB PSTB720-600-70 belongs to the PSTB series of softstarters. This device controls motor acceleration for large industrial applications. The ABB PSTB720-600-70 reduces mechanical stress on driven equipment. You get a built-in electronic overload protection system with service factor 115 percent. The softstarter supports both in-line and inside delta connections. The ABB PSTB720-600-70 includes multiple signal relays for comprehensive status monitoring.

Technical Specifications

The ABB PSTB720-600-70 delivers reliable motor starting for medium to 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): 720 A

• Rated operational current inside delta: 1247 A

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

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

• Rated operational power inside delta at 400 V: 710 kW

• Rated operational power inside delta at 500 V: 880 kW

• Service factor percentage: 115 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: 55 kg

• Package level 1 width: 500 mm

• Package level 1 depth: 600 mm

• Package level 1 height: 460 mm

• Package level 1 gross weight: 67 kg

Installation Guide

Follow these steps to install the ABB PSTB720-600-70 correctly.

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

2. Ensure adequate clearance around the unit for proper ventilation.

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 PSTB720-600-70.

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

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

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

Packing List

This package for the ABB PSTB720-600-70 includes the following items.

• ABB PSTB720-600-70 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 PSTB720-600-70?
The ABB PSTB720-600-70 has a rated operational current of 720 A for in-line connection. For inside delta connection, the rating increases to 1247 A.

2. What is the service factor of the PSTB720-600-70?
The ABB PSTB720-600-70 has a 115 percent service factor. This allows occasional overload operation above the rated current.

3. Does the PSTB720-600-70 have built-in overload protection?
Yes, the ABB PSTB720-600-70 includes integrated electronic overload protection. This feature eliminates the need for separate external overload relays.

4. What communication options does the ABB PSTB720-600-70 support?
The ABB PSTB720-600-70 comes with FieldBusPlug as standard equipment. This allows connection to various fieldbus networks with appropriate plug-in modules.

5. What is the ambient temperature range for the ABB PSTB720-600-70?
The ABB PSTB720-600-70 operates from 0°C to +50°C. Storage temperature ranges from -25°C to +70°C for the unit.