1SDA057161R1 ABB E6V6300PR121/P-LSI 6300 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E6V6300PR121/P-LSI 6300 A Air Circuit Breaker?

The ABB E6V6300PR121/P-LSI, order code 1SDA057161R1, is a high-capacity SACE Emax E6 V air circuit breaker moving part designed for protection, switching and isolation in demanding low-voltage power distribution systems. Rated at 6300 A, this four-pole withdrawable unit combines ABB's E6 V high-performance breaker platform with a PR121/P-LSI R6300 electronic overcurrent release.

As part of the ABB SACE Emax range, the breaker is engineered for industrial switchboards, power distribution centres and critical infrastructure where very high continuous current capacity and substantial short-circuit performance are required. The PR121/P-LSI trip unit provides long-time overload, short-time short-circuit and instantaneous short-circuit protection.

This configuration is a four-pole withdrawable moving part with a rated current of 6300 A. It incorporates four change-over auxiliary contacts and open/closed breaker position indication, while the draw-out construction enables efficient inspection, servicing and replacement within a compatible SACE Emax fixed part.

Key Advantages

• Very high 6300 A rated current for major low-voltage power distribution systems.
• E6 V high-performance platform for demanding high-current and high-fault-level applications.
• PR121/P-LSI R6300 electronic overcurrent release for coordinated circuit protection.
• LSI protection functions provide long-time overload, short-time short-circuit and instantaneous short-circuit protection.
• 150 kA rated short-circuit breaking capacity at 400 V AC, 50 Hz.
• Four-pole withdrawable configuration supports serviceable high-current switchgear installations.
• Draw-out construction facilitates inspection, maintenance and breaker replacement.
• Fitted with four change-over auxiliary contacts and open/closed position indication.

Key Features

• ABB SACE Emax E6 V series.
• 6300 A rated current.
• Four-pole configuration.
• Withdrawable moving part execution.
• PR121/P-LSI R6300 electronic overcurrent release.
• Long-time overload protection (L).
• Short-time short-circuit protection (S).
• Instantaneous short-circuit protection (I).
• 690 V AC rated voltage.
• 150 kA Icu at 400 V AC, 50 Hz.
• Four change-over auxiliary contacts for breaker status signalling.
• Open/closed breaker position indication.

Advanced LSI Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E6 protect high-current low-voltage distribution systems against overloads and short-circuit faults while providing reliable switching and isolation of major electrical circuits. With its 6300 A continuous current rating and 150 kA short-circuit breaking capacity at 400 V AC, the E6 V platform is suited to substantial electrical systems with demanding prospective fault levels.

The PR121/P-LSI electronic release combines long-time overload, short-time short-circuit and instantaneous short-circuit protection. The adjustable short-time function supports selective protection strategies with downstream devices, while the withdrawable E6 V construction provides operational flexibility and maintainability for critical switchgear installations.

Typical Applications

• Main incoming protection for high-current low-voltage switchboards.
• Large industrial power distribution systems.
• Manufacturing and process plant electrical infrastructure.
• Power distribution centres and main switchboards.
• Transformer secondary protection.
• High-current feeder and busbar protection.
• Critical infrastructure and large-scale electrical distribution networks.