1SDA062988R1 ABB T7V 1250 PR331/P-LSIG 1250 A 4-Pole MCCB

Why Choose the ABB 1SDA062988R1 T7V 1250 Circuit Breaker?

The ABB 1SDA062988R1, extended product type T7V 1250 PR331/P LSIG In=1250A 4p F F M, is a high-performance moulded case circuit breaker (MCCB) designed for protection and switching in demanding low-voltage electrical distribution systems. Part of the ABB SACE Tmax T7 series, it combines a 1250 A rated uninterrupted current, four-pole construction and a PR331/P-LSIG electronic trip unit.

The PR331/P-LSIG release provides long-time overload, short-time delayed short-circuit, instantaneous short-circuit and ground-fault protection. Its adjustable protection functions allow the breaker characteristics to be coordinated with the electrical installation, making the device particularly suitable for high-current incomers and feeders where comprehensive electronic protection is required.

With a rated ultimate short-circuit breaking capacity of 150 kA at 380–415 V AC, the T7V 1250 is engineered for installations with very high prospective fault currents. This version is a fixed four-pole breaker with front terminals and a motorisable operating mechanism, providing a robust solution for industrial switchboards, infrastructure and high-capacity power distribution assemblies.

Key Advantages

• High-performance ABB SACE Tmax T7V moulded case circuit breaker for demanding low-voltage distribution systems.
• 1250 A rated uninterrupted current for high-current applications.
• Four-pole construction for three-phase four-wire electrical distribution systems.
• 150 kA ultimate breaking capacity at 380–415 V AC for installations with very high prospective fault currents.
• Advanced PR331/P-LSIG electronic trip unit for comprehensive circuit protection.
• Provides long-time, short-time, instantaneous and ground-fault protection.
• Long-time overload protection adjustable from 0.4–1 × In.
• Instantaneous short-circuit protection adjustable from 1.5–15 × In.
• Ground-fault protection adjustable from 0.2–1 × In.
• Fixed configuration with front terminals for integration into low-voltage switchboards and distribution assemblies.

Key Features

• ABB SACE Tmax T7V 1250 series MCCB.
• 1250 A rated uninterrupted current.
• Four-pole construction.
• PR331/P-LSIG electronic release.
• Long-time overload protection.
• Short-time delayed short-circuit protection.
• Instantaneous short-circuit protection.
• Ground-fault protection.
• Long-time protection adjustable from 500–1250 A.
• Instantaneous protection adjustable from 1875–18750 A.
• Ground-fault protection adjustable from 250–1250 A.
• Neutral protection settings of OFF, 50%, 100% or 200%.
• 150 kA Icu at 380–415 V AC.
• Breaking capacity of up to 200 kA at 220–230 V AC.
• Fixed installation format with front terminals.
• Motorisable configuration for integration into remotely operated distribution systems.

Comprehensive LSIG Protection for High-Current Power Distribution

Moulded case circuit breakers such as the ABB Tmax T7V protect low-voltage electrical distribution systems against damaging overcurrent and fault conditions. The PR331/P-LSIG trip unit extends this protection to include overload, short-time and instantaneous short-circuit protection together with ground-fault protection, helping protect cables, switchgear and connected equipment throughout the distribution network.

The combination of adjustable LSIG protection and the 150 kA breaking capacity at 380–415 V AC makes the 1SDA062988R1 particularly suitable for high-current networks where protection coordination and substantial fault interruption capability are required. Its four-pole construction also supports three-phase four-wire systems where neutral switching and configurable neutral protection are needed.

Typical Applications

• Main and sub-main low-voltage distribution boards.
• Three-phase four-wire electrical distribution systems.
• Industrial switchboards and power distribution assemblies.
• Main incomers and high-current feeder circuits.
• Manufacturing and process plants.
• Commercial and infrastructure power distribution.
• Transformer secondary and feeder protection.
• Electrical networks requiring ground-fault protection.
• Installations with very high prospective short-circuit currents.