1SDA062974R1 ABB T7V 1250 PR332/P-LSI 1250 A 4-Pole MCCB

Why Choose the ABB 1SDA062974R1 T7V 1250 Circuit Breaker?

The ABB 1SDA062974R1, extended product type T7V 1250 PR332/P LSI In=1250A 4p F F, 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 PR332/P-LSI solid-state electronic trip unit.

The PR332/P-LSI release provides long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection. Adjustable protection thresholds allow the breaker characteristics to be coordinated with the electrical installation, making the device suitable for high-current feeders, incomers and distribution circuits where selective protection is important.

With a rated ultimate short-circuit breaking capacity of 150 kA at 400 V AC, 50 Hz, the T7V 1250 is designed for installations with very high prospective fault currents. This version is supplied as a fixed four-pole breaker with front terminals and a lever operating mechanism, providing a robust solution for industrial switchboards 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 distribution systems.
• 150 kA ultimate breaking capacity at 400 V AC, 50 Hz for installations with very high prospective fault currents.
• Advanced PR332/P-LSI electronic trip unit for comprehensive overload and short-circuit protection.
• Overload release adjustable from 500–1250 A.
• Short-time delayed release adjustable from 750–12500 A.
• Instantaneous short-circuit release adjustable from 1875–18750 A.
• 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.
• PR332/P-LSI solid-state electronic release.
• Long-time overload protection.
• Short-time delayed short-circuit protection.
• Instantaneous short-circuit protection.
• Overload release adjustable from 500–1250 A.
• Short-time delayed short-circuit release adjustable from 750–12500 A.
• Instantaneous short-circuit release adjustable from 1875–18750 A.
• 150 kA Icu at 400 V AC, 50 Hz.
• 690 V AC rated voltage.
• Fixed installation format.
• Front terminals with bolted main-circuit connections.
• Lever operating mechanism.
• IP20 degree of protection.

Advanced Protection for High-Current Power Distribution

Moulded case circuit breakers such as the ABB Tmax T7V protect low-voltage electrical distribution systems against excessive currents caused by overload and short-circuit conditions. The four-pole construction enables switching across a three-phase four-wire system, making this configuration particularly useful where the neutral conductor must be included in the switching arrangement.

The PR332/P-LSI electronic trip unit combines adjustable long-time, short-time delayed and instantaneous protection functions. Together with the 150 kA breaking capacity at 400 V AC of the T7V platform, the 1SDA062974R1 provides dependable protection for high-current distribution networks where selective coordination and very high fault-current interruption capability are required.

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.
• Electrical networks requiring coordinated short-time and instantaneous protection.
• Installations with very high prospective short-circuit currents.