1SDA056589R1 ABB E3V1250 PR122/P-LSIG 1250 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB 1SDA056589R1 E3V 1250 A Air Circuit Breaker?

The ABB 1SDA056589R1 is a high-performance SACE Emax E3V air circuit breaker (ACB) moving part designed for switching and protection in demanding low-voltage electrical distribution systems. Identified as E3V1250 PR122/P-LSIG In=1250A 4P W MP, this four-pole withdrawable circuit breaker moving part combines a 1250 A rated uninterrupted current with the ABB PR122/P-LSIG electronic overcurrent release.

As part of the ABB SACE Emax / New Emax range, the E3V1250 is engineered for industrial, commercial and infrastructure power distribution applications requiring advanced overcurrent protection and high fault-current interruption capability. The PR122/P-LSIG electronic trip unit provides long-time, short-time, instantaneous and ground-fault protection, helping safeguard cables, busbars, transformers and connected equipment against overloads, short circuits and earth faults.

This version features a four-pole withdrawable moving-part construction for use with the corresponding ABB SACE Emax fixed part. Rated for operation up to 690 V AC, with an ultimate short-circuit breaking capacity of 130 kA at 400–415 V AC and a rated short-time withstand current of 85 kA for 1 s, it is well suited to demanding distribution systems requiring comprehensive protection and convenient breaker isolation for servicing.

Key Advantages

• High-performance 1250 A air circuit breaker moving part for low-voltage power distribution.
• PR122/P-LSIG electronic overcurrent release for comprehensive circuit protection.
• LSIG functionality provides long-time, short-time, instantaneous and ground-fault protection.
• Four-pole configuration supports switching and protection across four conductors.
• Withdrawable moving-part design supports convenient switchboard servicing and maintenance.
• 130 kA ultimate short-circuit breaking capacity at 400–415 V AC.
• 100 kA service short-circuit breaking capacity at 400–415 V AC.
• 85 kA rated short-time withstand current for 1 s.

Key Features

• ABB SACE Emax E3V frame.
• 1250 A rated uninterrupted current.
• PR122/P-LSIG electronic trip unit.
• R1250 overcurrent release rating.
• Long-time, short-time, instantaneous and ground-fault (LSIG) protection.
• Four-pole configuration.
• Withdrawable moving-part design.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• Four auxiliary contacts with open/closed position indication.
• Designed for use with the corresponding ABB SACE Emax fixed part.

Reliable Circuit Protection for Power Distribution

Air circuit breakers such as the ABB E3V1250 provide switching and automatic protection for high-current low-voltage electrical distribution systems. The PR122/P electronic overcurrent release monitors circuit conditions and provides advanced protection functions to help safeguard cables, busbars, transformers and downstream electrical equipment against damaging overload, short-circuit and ground-fault conditions.

The LSIG configuration combines long-time overload protection, short-time selective short-circuit protection, instantaneous short-circuit protection and ground-fault protection. Combined with the four-pole withdrawable construction and high breaking performance of the E3V frame, this makes the 1SDA056589R1 suitable for critical installations requiring coordinated protection together with convenient breaker isolation, inspection and replacement.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Main incomer and high-current feeder protection.
• Four-pole power distribution circuits.
• Manufacturing and process plants.
• Commercial and infrastructure electrical systems.
• Transformer secondary distribution circuits.
• High-fault-level electrical installations.
• Switchboards requiring withdrawable air circuit breakers.
• Distribution systems requiring selective LSIG protection.