1SDA054105R1 ABB T4V 250 PR221DS-LS/I 100 A 4-Pole MCCB

Why Choose the ABB 1SDA054105R1 T4V 250 Moulded Case Circuit Breaker?

The ABB 1SDA054105R1, designated T4V 250 PR221DS-LS/I In=100 4p F F, is a high-performance moulded case circuit breaker (MCCB) designed for reliable protection of low-voltage AC power distribution systems. As part of the proven ABB SACE Tmax T4 series, it combines a compact 250 A frame, four-pole switching and electronic overcurrent protection for demanding industrial and commercial installations.

This circuit breaker is equipped with the PR221DS-LS/I solid-state electronic trip unit rated at 100 A. The release provides long-time overload, short-time and instantaneous short-circuit protection, with adjustable protection settings that enable the breaker to protect cables, switchgear and downstream electrical equipment against damaging overcurrent conditions.

The T4V 250 is supplied in a fixed four-pole configuration with front terminals and provides an ultimate short-circuit breaking capacity of 200 kA at 380/415 V AC. Its four-pole construction also provides neutral-pole protection settings, making the 1SDA054105R1 suitable for three-phase systems where switching and protection of the neutral conductor are required.

Key Advantages

• High-performance ABB SACE Tmax T4V moulded case circuit breaker.
• 100 A PR221DS-LS/I electronic trip unit for dependable distribution protection.
• Four-pole configuration supports three-phase systems with neutral conductor switching.
• Very high 200 kA ultimate breaking capacity at 380/415 V AC.
• Adjustable long-time and short-circuit protection settings for flexible circuit coordination.
• Fixed construction with front terminals simplifies integration into switchboards and distribution assemblies.

Key Features

• ABB SACE Tmax T4V 250 series.
• 100 A rated trip-unit current.
• 250 A rated uninterrupted current for the T4V 250 frame.
• PR221DS-LS/I solid-state electronic release.
• Long-time, short-time and instantaneous overcurrent protection.
• Adjustable long-time setting from 0.4–1 × In.
• Adjustable short-circuit setting from 1–10 × In.
• Neutral protection selectable at OFF / 50% / 100%.
• Four-pole fixed construction with front terminals.
• Ultimate short-circuit breaking capacity of 200 kA at 380/415 V AC.

Reliable Circuit Protection for Industrial Power Distribution

Moulded case circuit breakers such as the ABB T4V 250 protect low-voltage electrical systems by detecting and interrupting excessive current caused by overload and short-circuit conditions. The PR221DS-LS/I electronic release provides adjustable protection characteristics, allowing the breaker to be coordinated with the requirements of the protected distribution circuit while maintaining reliable fault protection.

The T4V performance level is designed for installations with high prospective short-circuit currents, while the four-pole configuration allows the neutral conductor to be incorporated into the switching and protection arrangement. Combined with fixed mounting and front terminals, the 1SDA054105R1 is well suited to industrial switchboards, distribution panels and other demanding low-voltage power systems.

Typical Applications

• Industrial low-voltage power distribution systems.
• Four-pole main and feeder protection in electrical switchboards.
• Three-phase distribution systems with neutral conductors.
• Manufacturing and process plant electrical systems.
• Commercial and infrastructure power distribution.
• Installations with high prospective short-circuit currents.