1SDA058976R1 ABB E3S/MS 2500 2500A 4-Pole Fixed Horizontal Rear Switch-Disconnector

Why Choose the ABB E3S/MS 2500 4-Pole Fixed Switch-Disconnector?

The ABB E3S/MS 2500 is a high-performance 2500 A four-pole fixed switch-disconnector designed for dependable switching and isolation in demanding low-voltage electrical distribution systems. Part of the ABB SACE Emax E3 series, this S-performance device combines substantial continuous-current capability with a robust fixed construction and horizontal rear terminals for integration into industrial, commercial and infrastructure switchboards.

ABB Emax switch-disconnectors identified by the /MS designation are derived from the corresponding Emax air circuit breakers, maintaining their overall dimensions and accessory compatibility while omitting the overcurrent trip unit. The E3S/MS supports AC-23A utilisation category applications in accordance with IEC 60947-3, making it suitable for switching motor loads and other highly inductive circuits as well as general isolation duties.

The 1SDA058976R1 configuration is rated at 2500 A and features a four-pole fixed construction with rear flat horizontal terminals. With a rated operational voltage of up to 690 V AC, a 75 kA one-second short-time withstand current and a 165 kA peak short-circuit making capacity, it provides robust switching and isolation performance for high-current low-voltage distribution systems.

Key Advantages

• Proven ABB SACE Emax E3S/MS switch-disconnector platform.
• 2500 A rated uninterrupted current for high-current distribution applications.
• Four-pole configuration for comprehensive switching and circuit isolation.
• Fixed construction provides robust permanent switchboard integration.
• Rear flat horizontal terminals support efficient high-current busbar connection.
• High 75 kA short-time withstand current for 1 s.
• 65 kA short-time withstand capability for 3 s.
• 165 kA peak short-circuit making capacity for demanding distribution systems.

Key Features

• ABB SACE Emax E3S/MS 2500 switch-disconnector.
• 2500 A rated uninterrupted current.
• Four-pole construction.
• Fixed (F) installation version.
• Rear flat horizontal (HR) terminal arrangement.
• S short-circuit performance level.
• 690 V AC / 250 V DC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 75 kA for 1 s rated short-time withstand current.
• 65 kA for 3 s rated short-time withstand current.
• 165 kA peak rated short-circuit making capacity.

High-Performance Fixed Switching and Isolation

The ABB E3S/MS 2500 provides a dependable means of making, carrying and isolating high-current electrical circuits without an integrated overcurrent trip unit. Its 75 kA one-second short-time withstand rating, 65 kA three-second withstand rating and 165 kA peak making capacity provide strong electrical performance for substantial low-voltage distribution systems when suitable protective equipment is coordinated elsewhere in the installation.

The fixed construction and rear flat horizontal terminals make the 1SDA058976R1 particularly suitable for permanent installation in high-capacity switchboards with rear busbar connections. Combined with its 2500 A current rating, four-pole architecture, AC-23A switching capability and proven SACE Emax mechanical platform, the E3S/MS 2500 provides a robust solution for critical industrial and commercial power distribution.

Typical Applications

• Main low-voltage distribution switchboards.
• High-current industrial power-distribution systems.
• Main incomer, feeder and bus-coupler switching.
• Four-pole electrical switching and isolation.
• Motor and highly inductive load switching under AC-23A duty.
• Manufacturing and process plants.
• Commercial and infrastructure electrical installations.
• High-fault-level fixed switchgear and power-distribution assemblies.