ABB SACE PR231/P Trip Unit for Tmax T7 Circuit Breaker

The ABB SACE PR231/P is an electronic trip unit designed for the Tmax T7 series of molded case circuit breakers. It provides comprehensive protection against both overload and short-circuit faults, featuring adjustable protection thresholds via DIP switches for precise configuration to match specific load requirements.

Product Description

• The PR231/P trip unit offers three main protection functions:

  • L (Long-time): Adjustable inverse time overload protection.

  • S (Short-time): Adjustable inverse or definite time short-circuit protection.

  • I (Instantaneous): Instantaneous short-circuit protection.​

• It is a solid-state, plug-in type device that can be easily replaced or reconfigured by the user.​

• The trip unit is equipped with LEDs to indicate fault conditions and operational status.​

• Designed for Tmax T7 circuit breakers up to 1600 A, it ensures reliable and selective protection in industrial and commercial power distribution systems.​

• The PR231/P supports front terminal connections and is compatible with various Tmax T7 frame sizes, making it suitable for compact and modular switchboard installations.

Abb Sace PR231 P Key Specs:

• Rated Current (In): 1600 A ​
• Three Poles ​
• Rated Voltage for Operation: 690 V AC ​
• Rated Insulation Voltage (Ui): 1000 V ​
• Rated Impulse Withstand Voltage (Uimp): 8 kV
• Short-Circuit Breaking Capacity (Ics):

• 85 kA at 220–230 V AC
• 50 kA at 380 to 415 V AC
• 40 kA at 500 V AC
• 30 kA at 690 volts AC ​

• Mechanical Durability: 10,000 cycles at a rate of 60 cycles per hour
• Electrical Durability: 2,000 operations at 60 cycles per hour
• Power Loss per Pole at Rated Conditions: 77 W ​
• Type of terminal: front fixed terminals ​
• How it works: lever for stored energy ​
• Trip Unit: PR231/P (solid-state electronic release for safety against overload and short circuits) ​

Features:

• Made for small panel installations with front terminals that make wiring straightforward
• High breaking strength for dependable protection in tough conditions
• The PR231/P electronic trip unit protects against overload and short-circuit problems with customizable and accurate settings
• Follows the IEC 60947-2 rules for molded box circuit breakers
• Good for applications where it needs to be mounted permanently

Dimensions and weight:

-> The T7S series is usually 210 mm wide, 268 mm high, and 178 mm deep, and it weighs about 11 kg (the weight varies slightly depending on the arrangement). ​

Applications:

-> Power distribution in industry

-> Protection for excessive loads in the main circuit

-> Important infrastructure and business buildings ​