1SDA056818R1 ABB E4H 3200 PR121/P-LSIG 3200 A 3-Pole Air Circuit Breaker

Why Choose the ABB 1SDA056818R1 E4H 3200 Air Circuit Breaker?

The ABB 1SDA056818R1 is a high-performance SACE Emax E4H 3200 air circuit breaker (ACB) designed for protection and switching in demanding high-current low-voltage electrical distribution systems. Part of the ABB New Emax / SACE Emax range, this three-pole fixed circuit breaker combines a 3200 A rated current with the PR121/P-LSIG electronic overcurrent release.

The PR121/P-LSIG electronic trip unit provides comprehensive LSIG protection, combining long-time overload, short-time short-circuit, instantaneous short-circuit and ground-fault protection. This allows the breaker to protect conductors, busbars, switchgear and connected equipment against a wide range of overcurrent and earth-fault conditions in critical power-distribution installations.

With a rated uninterrupted current of 3200 A, a three-pole fixed configuration and rear flat horizontal terminals, the 1SDA056818R1 is designed for integration into high-capacity electrical switchboards. The E4H high-performance design provides a rated ultimate short-circuit breaking capacity of 100 kA at 400 V AC and 85 kA at 690 V AC.

Key Advantages

• High-capacity 3200 A air circuit breaker for demanding low-voltage power distribution.
• E4H high-breaking-capacity performance level for systems with substantial prospective fault currents.
• Advanced PR121/P-LSIG electronic protection release.
• LSIG functionality provides overload, short-time, instantaneous and ground-fault protection.
• 100 kA ultimate short-circuit breaking capacity at 400 V AC.
• 85 kA ultimate short-circuit breaking capacity at 690 V AC.
• Three-pole fixed construction for permanent switchboard installations.
• Rear flat horizontal terminals support integration into suitable busbar and switchboard arrangements.

Key Features

• ABB SACE Emax E4H 3200 series.
• 3200 A rated uninterrupted current.
• Three-pole circuit-breaker configuration.
• Fixed installation version.
• PR121/P-LSIG R3200 electronic overcurrent release.
• Long-time (L) overload protection.
• Short-time (S) short-circuit protection.
• Instantaneous (I) short-circuit protection.
• Ground-fault (G) protection.
• 100 kA Icu at 400 V AC.
• 85 kA Icu at 690 V AC.
• Rear flat horizontal main terminals.
• Four auxiliary contacts for circuit-breaker status signalling.
• Open/closed circuit-breaker position indication.

Advanced Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E4H provide switching and protection for high-current low-voltage distribution networks. The electronic trip unit monitors electrical conditions and initiates circuit interruption when configured protection thresholds are exceeded, helping protect switchgear, cables, busbars and connected equipment against potentially damaging electrical faults.

The PR121/P-LSIG release combines long-time overload, short-time short-circuit, instantaneous short-circuit and ground-fault protection. Together with the E4H circuit breaker's high fault-breaking capability, this makes the 1SDA056818R1 particularly suitable for main distribution systems and industrial installations requiring comprehensive protection against both overcurrent and earth-fault conditions.

Typical Applications

• Main low-voltage electrical distribution switchboards.
• Industrial power distribution systems.
• Manufacturing and process plants.
• Commercial and infrastructure electrical installations.
• Transformer secondary circuit protection.
• Main incomer and high-current feeder protection.
• Electrical installations requiring ground-fault protection.
• Systems with high prospective short-circuit currents.