1SDA056826R1 ABB E4H3200 PR121/P-LSIG 3200 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E4H3200 PR121/P-LSIG Air Circuit Breaker?

The ABB E4H3200 PR121/P-LSIG, order code 1SDA056826R1, is a high-performance SACE Emax air circuit breaker designed for switching and comprehensive protection in demanding low-voltage power-distribution systems. Part of the ABB SACE Emax E4 series, this four-pole fixed circuit breaker combines a 3200 A rated uninterrupted current with the PR121/P-LSIG R3200 electronic overcurrent release.

The PR121/P-LSIG release provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. These LSIG functions provide comprehensive protection against sustained overloads, short circuits and earth faults, making the breaker well suited to high-capacity industrial and infrastructure distribution networks where selective and dependable circuit protection is required.

This configuration is a four-pole fixed circuit breaker with rear flat horizontal terminals. The E4H performance level provides an ultimate short-circuit breaking capacity of 100 kA at 400 V AC, while the breaker is supplied with four auxiliary contacts and open/closed position indication for integration into switchboard monitoring and control systems.

Key Advantages

• High-current 3200 A SACE Emax air circuit breaker.
• PR121/P-LSIG R3200 electronic release provides comprehensive LSIG protection.
• Long-time, short-time, instantaneous and earth-fault protection covers a broad range of electrical fault conditions.
• Four-pole configuration supports three-phase distribution systems requiring neutral switching.
• Fixed construction with rear flat horizontal terminals supports permanent switchboard integration.
• 100 kA ultimate short-circuit breaking capacity at 400 V AC for demanding high-fault-level systems.
• 100 kA short-time withstand current for 1 s supports selective power-distribution designs.
• Four auxiliary contacts and open/closed indication support switchboard signalling and control.

Key Features

• ABB SACE Emax E4H3200 air circuit breaker.
• 3200 A rated uninterrupted current.
• Four-pole fixed version.
• PR121/P-LSIG R3200 electronic overcurrent release.
• L protection: long-time overload protection.
• S protection: short-time short-circuit protection.
• I protection: instantaneous short-circuit protection.
• G protection: earth-fault protection.
• H short-circuit performance level.
• 100 kA Icu at 400 V AC.
• 100 kA Icw for 1 s.
• 75 kA Icw for 3 s.
• Rear flat horizontal terminal arrangement.
• Four auxiliary contacts for signalling and control.
• Integrated circuit-breaker open/closed position indication.

Reliable LSIG Protection for High-Fault-Level Power Distribution

The ABB SACE Emax E4H3200 is engineered for switching and protection at main incomer, bus-coupler and high-current feeder levels within substantial low-voltage distribution systems. Its PR121/P-LSIG electronic release combines long-time protection against sustained overloads, short-time protection for coordinated fault clearing, instantaneous intervention against severe short circuits and earth-fault protection.

The combination of a 3200 A current rating, four-pole construction and 100 kA short-circuit breaking capacity at 400 V AC makes the 1SDA056826R1 particularly suitable for installations with high prospective fault currents. Its fixed construction and rear horizontal terminals provide robust permanent switchboard integration, while the auxiliary contacts provide useful status information for associated monitoring, signalling and control systems.

Typical Applications

• Main low-voltage distribution switchboards.
• High-fault-level industrial power-distribution systems.
• Manufacturing and process plants.
• Commercial and infrastructure electrical installations.
• Transformer secondary and main incomer protection.
• High-current feeder and earth-fault protection.
• Bus-coupler and power-distribution assemblies.