1SDA056426R1 ABB E3H1600 PR121/P-LSIG 1600 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB 1SDA056426R1 E3H1600 Air Circuit Breaker?

The ABB 1SDA056426R1 is a high-performance SACE Emax E3H air circuit breaker (ACB) moving part designed for protection and switching in demanding low-voltage electrical distribution systems. As part of the ABB New Emax E3 series, this four-pole withdrawable circuit breaker combines a 1600 A rated current with the PR121/P-LSIG electronic overcurrent release for comprehensive protection of industrial, commercial and infrastructure power installations.

The E3H1600 is equipped with ABB's PR121/P-LSIG R1600 electronic trip unit, providing long-time overload, short-time short-circuit, instantaneous short-circuit and ground-fault protection. This LSIG configuration provides comprehensive electronic protection against overloads, short circuits and earth faults, with adjustable protection ranges that support coordination with other protective devices in the distribution system.

With a 1600 A rated uninterrupted current, four-pole withdrawable moving-part construction and an ultimate short-circuit breaking capacity of 100 kA at 400 V AC, the 1SDA056426R1 is engineered for switchboards with substantial prospective fault currents. Its withdrawable construction allows the moving part to be disconnected from the corresponding fixed part for inspection, servicing or replacement while supporting maintainable high-current switchgear installations.

Key Advantages

• High-performance ABB SACE Emax E3H air circuit breaker moving part for demanding low-voltage distribution.
• 1600 A rated uninterrupted current for high-current industrial, commercial and infrastructure applications.
• PR121/P-LSIG electronic overcurrent release provides comprehensive electronic circuit protection.
• LSIG functionality provides long-time, short-time, instantaneous and ground-fault protection.
• Four-pole construction supports three-phase systems requiring neutral switching.
• Ultimate short-circuit breaking capacity of 100 kA at 400 V AC for high-fault-level installations.
• Withdrawable moving-part design supports convenient inspection, servicing and replacement.
• Four auxiliary contacts and open/closed position indication support circuit-breaker monitoring and control.

Key Features

• ABB SACE Emax E3H1600 series air circuit breaker.
• 1600 A rated uninterrupted current.
• Four-pole configuration.
• Withdrawable moving-part version.
• PR121/P-LSIG R1600 electronic overcurrent release.
• LSIG protection covering long-time, short-time, instantaneous and ground-fault functions.
• Rated operational voltage of 690 V AC.
• Ultimate short-circuit breaking capacity of 100 kA at 400 V AC.
• Adjustable overload protection from 640–1600 A.
• Adjustable short-time protection from 1600–16000 A.
• Adjustable instantaneous protection from 2400–24000 A.
• IP2X degree of protection with optional motor operating mechanism compatibility.

Advanced Protection for High-Current Power Distribution

Air circuit breakers such as the ABB E3H1600 provide switching and protection for high-current low-voltage distribution systems. The electronic trip unit monitors current conditions and enables the breaker to interrupt overload, short-circuit and ground-fault conditions, helping protect busbars, cables, transformers and connected electrical equipment from potentially damaging fault currents.

The integrated PR121/P-LSIG electronic trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and ground-fault protection. Combined with the E3H breaker's 1600 A current rating, four-pole construction, 100 kA ultimate breaking capacity at 400 V AC and withdrawable configuration, the 1SDA056426R1 is particularly suited to main distribution circuits requiring comprehensive electronic protection, high fault-clearing capability and maintainable switchgear.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Manufacturing and process plants.
• Commercial and large-building electrical distribution.
• Main incomer and high-current feeder protection.
• Three-phase four-wire electrical distribution systems.
• Generator and transformer distribution circuits.
• Installations requiring integrated ground-fault protection.
• Power control centres and withdrawable switchgear assemblies.