1SDA057529R1 ABB E3S-A 2500 PR121/P-LI 2500 A 3-Pole Withdrawable Circuit Breaker

Why Choose the ABB 1SDA057529R1 E3S-A 2500 Circuit Breaker?

The ABB 1SDA057529R1 is a high-performance SACE Emax E3S-A air circuit breaker moving part designed for reliable protection and switching in high-current low-voltage electrical distribution systems. Rated at 2500 A, this three-pole withdrawable configuration incorporates a PR121/P-LI R2500 electronic overcurrent release providing long-time and instantaneous protection.

As part of the proven ABB SACE Emax series, the E3S-A 2500 combines robust switching technology with electronic protection for industrial switchboards, power distribution panels and critical electrical infrastructure. Its withdrawable moving-part construction is particularly suited to installations where convenient inspection, servicing and replacement of the circuit breaker are important requirements.

This configuration is a three-pole withdrawable moving part rated for 600 V systems and provides service short-circuit breaking capacities of 85 kA at 240 V AC, 85 kA at 480 V AC and 65 kA at 600 V AC. It is fitted with four auxiliary contacts and open/closed position indication for integration with switchboard monitoring and control systems.

Key Advantages

• Heavy-duty ABB SACE Emax air circuit breaker moving part for low-voltage power distribution.
• 2500 A rated current for high-current industrial applications.
• PR121/P-LI electronic trip unit for reliable overcurrent protection.
• Provides long-time and instantaneous protection.
• Three-pole withdrawable configuration supports convenient inspection and servicing.
• 85 kA service short-circuit breaking capacity at 480 V AC.
• Four auxiliary contacts provide useful circuit breaker status signalling.
• UL 1066 design for demanding low-voltage power distribution applications.

Key Features

• ABB SACE Emax E3S-A series.
• 2500 A rated current.
• Three-pole circuit breaker moving part.
• Withdrawable execution.
• PR121/P-LI R2500 electronic overcurrent release.
• Long-time (L) and instantaneous (I) protection functions.
• 37,500 A instantaneous protection setting.
• 600 V rated voltage.
• 85 kA Ics at 240 V AC and 480 V AC.
• 65 kA Ics at 600 V AC.
• Four auxiliary contacts fitted.
• Open/closed circuit breaker position indication.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3S-A protect low-voltage distribution systems against damaging overload and short-circuit conditions while also providing controlled switching and isolation. Their high current capacity and strong interruption performance make them particularly suitable for main distribution boards, industrial switchgear and other installations carrying substantial electrical loads.

The PR121/P-LI electronic release provides long-time protection against sustained overload conditions and instantaneous protection against severe short-circuit currents. Combined with the withdrawable Emax construction, these functions provide dependable electrical protection together with valuable maintenance and servicing flexibility.

Typical Applications

• Main low-voltage electrical distribution boards.
• Industrial power distribution systems.
• Factory and manufacturing switchgear.
• Commercial and infrastructure electrical installations.
• Transformer secondary protection and distribution.
• High-current feeder protection.
• Power control centres and withdrawable switchboards.
• Critical electrical distribution infrastructure.