1SDA054700R1 ABB PR221DS-LS/I In=400 T5 4p Electronic Trip Unit

Why Choose the ABB PR221DS-LS/I In=400 T5 4p Electronic Trip Unit?

The ABB PR221DS-LS/I In=400 T5 4p is an advanced electronic trip unit designed for ABB SACE Tmax T5 moulded case circuit breakers, providing accurate LS/I protection for low-voltage electrical distribution systems. As part of the ABB Tmax T electronic protection accessory range, it delivers dependable overload, short-circuit and instantaneous fault protection for industrial and commercial applications.

This electronic release combines long-time, short-time and instantaneous protection functions to help safeguard electrical equipment and improve protection coordination. The PR221DS-LS/I design provides a compact and reliable solution for installations requiring accurate electronic monitoring and fast response to abnormal current conditions.

With a rated current of 400 A and compatibility with ABB Tmax T5 4-pole circuit breakers, the ABB PR221DS-LS/I In=400 T5 4p is suitable for demanding low-voltage distribution applications requiring dependable circuit protection.

Key Advantages

• Electronic LS/I protection technology for ABB Tmax T5 moulded case circuit breakers.
• 400 A rated current suitable for industrial power distribution systems.
• Provides long-time, short-time and instantaneous protection functions.
• Four-pole configuration for three-phase systems with neutral.
• Improves fault response accuracy and protection coordination.
• Designed for reliable integration with ABB SACE Tmax T circuit breaker systems.

Key Features

• ABB PR221DS-LS/I In=400 T5 4p electronic trip unit.
• Suitable for ABB SACE Tmax T5 circuit breakers.
• Four-pole (4P) configuration.
• Rated current In: 400 A.
• LS/I protection functions including long-time, short-time and instantaneous protection.
• Solid-state electronic release technology.
• Adjustable protection parameters for improved selectivity.
• Designed for industrial low-voltage circuit protection applications.

Reliable Electronic Protection for Low-Voltage Systems

Electronic trip units such as the ABB PR221DS-LS/I In=400 T5 4p continuously monitor current levels and provide fast, accurate protection responses when electrical conditions exceed safe operating limits. The LS/I functions help protect cables, equipment and distribution systems from overload and fault currents.

Installed within ABB Tmax T5 moulded case circuit breakers, the PR221DS-LS/I release provides a durable and efficient protection solution for industrial switchboards, distribution panels and electrical infrastructure where reliable fault management is essential.

Typical Applications

• Industrial power distribution boards.
• Low-voltage switchgear assemblies.
• Commercial electrical installations.
• Machinery and automation systems.
• Factory electrical distribution networks.
• Applications requiring adjustable electronic circuit breaker protection.