1SDA057311R1 ABB E2N-A 1200 PR121/P-LSIG 1200 A 3-Pole Air Circuit Breaker

Why Choose the ABB E2N-A 1200 PR121/P-LSIG 1200 A Air Circuit Breaker?

The ABB E2N-A 1200 PR121/P-LSIG, order code 1SDA057311R1, is a SACE Emax E2N-A air circuit breaker designed for protection, switching and isolation in demanding low-voltage power distribution systems. Rated at 1200 A, this three-pole breaker combines ABB's E2N-A platform with a PR121/P-LSIG electronic overcurrent release.

As part of the ABB SACE Emax family, the breaker is suited to industrial switchboards, distribution systems and infrastructure applications requiring comprehensive electronic circuit protection. The PR121/P-LSIG release provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection, delivering a complete LSIG protection package.

With its 1200 A rating and three-pole configuration, the E2N-A 1200 is suited to important three-phase incoming and feeder circuits. The combination of adjustable electronic protection and earth-fault functionality helps protect conductors, busbars, transformers and connected equipment while supporting coordinated fault clearing across the distribution system.

Key Advantages

• 1200 A rated current for substantial low-voltage distribution circuits.
• PR121/P-LSIG electronic overcurrent release for comprehensive circuit protection.
• LSIG protection functions cover overload, short-time and instantaneous short-circuit faults plus earth faults.
• Three-pole configuration for three-phase electrical distribution systems.
• Short-time protection supports selective coordination with downstream protective devices.
• Integrated earth-fault protection helps protect electrical systems against ground-fault conditions.
• Electronic trip technology provides accurate protection for important high-current circuits.
• Suitable for incoming, feeder, transformer secondary and industrial distribution duties.

Key Features

• ABB SACE Emax E2N-A series.
• 1200 A rated current.
• Three-pole configuration.
• PR121/P-LSIG electronic overcurrent release.
• Long-time overload protection (L).
• Short-time short-circuit protection (S).
• Instantaneous short-circuit protection (I).
• Earth-fault protection (G).
• Electronic overcurrent and earth-fault protection.
• Designed for high-current low-voltage distribution circuits.
• Suitable for industrial, commercial and infrastructure switchboards.

Comprehensive LSIG Protection for Power Distribution

Air circuit breakers such as the ABB SACE Emax E2 provide switching, isolation and fault protection for substantial low-voltage electrical distribution systems. The E2N-A platform and 1200 A current rating make this configuration suitable for important incoming and feeder circuits where dependable operation and comprehensive fault protection are required.

The PR121/P-LSIG electronic release combines long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. This LSIG combination supports selective protection strategies while helping protect busbars, conductors, transformers and connected equipment against both phase overcurrents and earth-fault conditions.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial incoming and feeder circuits.
• Manufacturing and process plant electrical systems.
• Commercial building power distribution.
• Transformer secondary distribution circuits.
• Distribution systems requiring earth-fault protection.
• Infrastructure and critical low-voltage power systems.