1SDA072801R1 ABB E1.2B 1250 Ekip Dip LI 4p WMP Air Circuit Breaker

Why Choose the ABB E1.2B 1250 Ekip Dip LI 4p WMP Air Circuit Breaker?

The ABB E1.2B 1250 Ekip Dip LI 4p WMP, order code 1SDA072801R1, is a high-performance four-pole withdrawable air circuit breaker moving part designed for protection and switching in low-voltage power distribution systems. As part of the ABB SACE Emax 2 E1.2 series, it combines a 1250 A rated current with an Ekip Dip LI solid-state electronic trip unit for dependable overload and instantaneous short-circuit protection.

The Ekip Dip LI release provides long-time overload and instantaneous short-circuit protection, giving straightforward electronic protection for feeders, distribution circuits and other low-voltage applications. Adjustable protection settings allow the breaker to be coordinated with the electrical network while helping protect cables, busbars, switchgear and connected equipment against damaging overcurrents.

The E1.2B performance level provides an ultimate short-circuit breaking capacity of 42 kA at 400–415 V AC and maintains a 42 kA breaking capacity at 690 V AC, with a rated short-time withstand current of 42 kA for 1 s. Its withdrawable construction enables the moving breaker to be separated from the corresponding fixed chassis for inspection and servicing.

Key Advantages

• 1250 A rated current for substantial low-voltage distribution loads.
• Four-pole configuration for comprehensive switching and circuit protection.
• Ekip Dip LI electronic trip unit for overload and instantaneous short-circuit protection.
• 42 kA ultimate short-circuit breaking capacity at 400–415 V AC.
• 42 kA service breaking capacity, equal to 100% of Icu.
• 42 kA short-time withstand current for 1 s.
• Withdrawable moving-part design facilitates inspection, servicing and replacement.
• Part of the modular ABB SACE Emax 2 air circuit breaker platform.

Key Features

• ABB SACE Emax 2 E1.2B air circuit breaker moving part.
• 1250 A rated uninterrupted current.
• 4-pole construction with 100% neutral-pole current capability.
• Ekip Dip LI solid-state electronic protection release.
• Long-time overload protection.
• Instantaneous short-circuit protection.
• 690 V AC rated operational voltage.
• 1000 V AC rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• Withdrawable execution for use with the corresponding Emax 2 fixed part.
• Four auxiliary contacts for circuit-breaker signalling.
• Open/closed circuit-breaker position indication.
• Suitable for IT networks up to 690 V.

Reliable LI Protection for Low-Voltage Distribution

ABB SACE Emax 2 air circuit breakers are designed to provide dependable switching and protection for demanding low-voltage electrical networks. The Ekip Dip LI release combines long-time overload protection with instantaneous short-circuit protection, providing essential electronic protection for distribution circuits without the additional short-time or earth-fault functions of LSI and LSIG releases.

The withdrawable E1.2 construction is particularly suitable for switchboards where maintainability and continuity of service are important. The breaker moving part connects through a separate fixed chassis and can be withdrawn when required, while its four auxiliary contacts and open/closed position indication support integration with switchboard signalling and control systems.

Typical Applications

• Main low-voltage distribution switchboards.
• Industrial power distribution systems.
• Commercial building electrical distribution.
• Manufacturing and process facilities.
• Transformer and installation protection.
• Infrastructure and utility installations.
• High-current feeder protection.
• Withdrawable switchgear requiring electronic LI protection.