1SDA059438R1 ABB E4H/f3200 PR121/P-LSI 3200 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB 1SDA059438R1 E4H/f3200 Air Circuit Breaker?

The ABB 1SDA059438R1 is a high-performance SACE New Emax E4H/f air circuit breaker (ACB) designed for protection, switching and isolation in demanding high-current low-voltage distribution systems. Identified as E4H/f3200PR121/P-LSIIn=3200A4pWMP, this four-pole withdrawable circuit breaker moving part combines a substantial 3200 A rated current with the PR121/P-LSI electronic overcurrent release.

The E4H/f configuration incorporates a full-size neutral pole, providing full current-carrying capability across all four poles. The PR121/P-LSI trip unit provides long-time overload, short-time short-circuit and instantaneous short-circuit protection, making the breaker suitable for coordinated protection of critical high-capacity distribution circuits.

The 1SDA059438R1 is supplied as a four-pole withdrawable moving part for use with a compatible ABB SACE Emax fixed part. The E4H/f 3200 platform combines a 3200 A frame size with high short-circuit performance, while the withdrawable construction facilitates electrical isolation, inspection and maintenance in important industrial and commercial switchgear installations.

Key Advantages

• High-capacity 3200 A ABB SACE New Emax air circuit breaker.
• Four-pole configuration with full-size neutral for demanding four-wire distribution systems.
• Withdrawable moving-part design supports convenient isolation, servicing and maintenance.
• PR121/P-LSI electronic overcurrent release for coordinated circuit protection.
• Provides long-time, short-time and instantaneous protection.
• E4H high short-circuit performance for installations with substantial prospective fault currents.
• 100 kA ultimate short-circuit breaking capacity at 400–500 V AC.
• Designed for critical main incomer and high-current feeder applications.

Key Features

• ABB SACE New Emax E4H/f series.
• 3200 A rated current.
• Four-pole construction.
• Full-size neutral pole.
• Withdrawable version.
• Supplied as the moving part (MP).
• PR121/P electronic trip unit.
• LSI protection functions: long-time, short-time and instantaneous.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• High short-time withstand capability for selective distribution-system protection.

High-Capacity Protection for Critical Power Distribution

Air circuit breakers such as the ABB SACE New Emax E4H/f are designed for main distribution circuits carrying substantial electrical loads and exposed to high prospective short-circuit currents. The E4H/f combines a 3200 A current rating with high fault interruption performance and a full-size neutral, making it particularly suitable for critical four-wire low-voltage distribution systems.

The PR121/P-LSI electronic release provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. These LSI functions support protection coordination between incoming and downstream devices, while the withdrawable construction allows the breaker moving part to be isolated and withdrawn from its compatible fixed part for inspection or maintenance.

Typical Applications

• Main low-voltage electrical distribution switchboards.
• High-current industrial power distribution systems.
• Large commercial and infrastructure installations.
• Manufacturing and process plants.
• Transformer secondary protection.
• Generator and standby power distribution systems.
• Main incomer and high-current feeder protection.
• Four-wire systems requiring a 3200 A full-size neutral.