1SDA056591R1 ABB E3V1250 PR123/P-LSIG 1250 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E3V1250 PR123/P-LSIG 1SDA056591R1 Air Circuit Breaker?

The ABB 1SDA056591R1 is a high-performance SACE Emax E3 V withdrawable air circuit breaker (ACB) designed for protection, switching and advanced monitoring in demanding low-voltage electrical distribution systems. As part of the ABB SACE Emax series, this four-pole breaker combines a 1250 A rated current with high short-circuit performance and an advanced electronic protection release.

The E3V1250 is equipped with an ABB PR123/P-LSIG electronic overcurrent release, providing long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. These L, S, I and G protection functions make the breaker particularly suitable for complex distribution networks where selective protection and comprehensive fault protection are required.

With a rated uninterrupted current of 1250 A, a rated operational voltage of 690 V AC and a four-pole withdrawable configuration, the 1SDA056591R1 is well suited to main distribution boards, industrial switchgear and critical power systems. The E3 V performance level provides a rated ultimate short-circuit breaking capacity of 130 kA at 400 V AC, supporting reliable protection where high prospective fault currents are present.

Key Advantages

• High-performance ABB SACE Emax E3 V air circuit breaker for demanding low-voltage distribution systems.
• 1250 A rated uninterrupted current for high-current electrical installations.
• Four-pole withdrawable configuration for flexible switchboard installation and maintenance.
• PR123/P-LSIG electronic release provides comprehensive overload, short-circuit and earth-fault protection.
• High 130 kA ultimate short-circuit breaking capacity at 400 V AC.
• Withdrawable construction simplifies inspection, servicing and replacement within compatible switchgear assemblies.

Key Features

• ABB SACE Emax E3 V series.
• 1250 A rated current.
• Four-pole withdrawable circuit breaker.
• PR123/P-LSIG electronic overcurrent release.
• Long-time overload (L), short-time short-circuit (S), instantaneous short-circuit (I) and earth-fault (G) protection.
• 690 V AC rated operational voltage.
• 130 kA Icu at 400 V AC.
• 100 kA Ics at 400 V AC.
• 85 kA short-time withstand current for 1 s.
• High electrical and mechanical endurance for industrial switchgear applications.

Advanced Protection for Critical Power Distribution

Air circuit breakers such as the ABB SACE Emax E3V1250 provide controlled switching and protection for high-current low-voltage distribution circuits. The PR123/P-LSIG electronic release combines overload, selective short-circuit, instantaneous short-circuit and earth-fault protection, helping safeguard switchboards, conductors and connected equipment against a broad range of electrical faults.

The E3 V performance level is engineered for electrical networks with substantial prospective fault currents. Its withdrawable construction also supports efficient maintenance and system availability by allowing the breaker moving part to be isolated and removed from compatible switchgear without dismantling the main power connections.

Typical Applications

• Main low-voltage electrical distribution boards.
• Industrial switchboards and withdrawable switchgear assemblies.
• Manufacturing plants and process facilities.
• Commercial and infrastructure power distribution systems.
• High-current feeder and distribution circuit protection.
• Electrical networks requiring selective and earth-fault protection.