1SDA059427R1 ABB E3S/MS1000 1000 A 4-Pole Fixed Switch-Disconnector

Why Choose the ABB 1SDA059427R1 E3S/MS1000 Switch-Disconnector?

The ABB 1SDA059427R1 is a SACE Emax E3S/MS air switch-disconnector designed for high-current switching and isolation duties in demanding low-voltage electrical distribution systems. Identified by ABB as E3S/MS10004pFHRnew, this four-pole fixed unit has a rated current of 1000 A and provides robust isolation functionality for industrial and commercial switchboards.

Unlike an E3S air circuit breaker equipped with an electronic protection release, the E3S/MS is specifically a switch-disconnector. It is intended for switching and isolation rather than automatic overload or short-circuit protection, so appropriate upstream or external protective devices must be incorporated into the electrical system.

The 1SDA059427R1 features a four-pole fixed construction with rear horizontal terminals, making it suitable for three-phase systems where neutral switching is required. With a rated operational voltage of up to 690 V AC, the unit provides a durable solution for permanent installation within compatible ABB SACE Emax low-voltage switchgear.

Key Advantages

• 1000 A rated current for high-current low-voltage distribution systems.
• Four-pole configuration for simultaneous switching of three phases and neutral where required.
• Fixed construction for robust permanent switchboard installation.
• Rear horizontal terminals for practical busbar and switchboard integration.
• Dedicated switch-disconnector design for switching and circuit isolation.
• 690 V AC maximum rated operational voltage.
• Front protection rating of IP20.
• Optional motor operator and voltage release options support enhanced switchgear functionality.

Key Features

• ABB SACE New Emax E3S/MS series.
• 1000 A rated uninterrupted current.
• Four-pole construction.
• Fixed version.
• Rear horizontal terminals.
• Switch-disconnector function for switching and isolation.
• No electronic overcurrent trip unit.
• 690 V AC maximum rated operational voltage.
• IP20 front protection.
• Lockable operating mechanism.
• Optional motor operator.
• Optional voltage release.

Reliable Switching and Isolation for Power Distribution

The ABB SACE Emax E3S/MS is designed for applications where high-current circuits need to be switched and isolated without incorporating an automatic electronic overcurrent protection release. The four-pole configuration of the 1SDA059427R1 allows the neutral conductor to be switched together with the three phase conductors where required by the electrical system design.

Its fixed construction and rear horizontal terminals make the unit suitable for permanent installation in low-voltage switchboards. Because the E3S/MS functions as a switch-disconnector rather than a protective circuit breaker, suitable upstream or external protective devices must be selected to provide the required overload and short-circuit protection for the installation.

Typical Applications

• Main low-voltage electrical distribution switchboards.
• Industrial power distribution systems.
• Commercial building electrical infrastructure.
• High-current circuit switching and isolation.
• Manufacturing and process plant switchboards.
• Transformer secondary distribution systems.
• Generator and standby power distribution systems.
• Four-pole installations requiring neutral switching and positive circuit isolation.