1SDA059437R1 ABB E4H/f3200 PR121/P-LI 3200 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB 1SDA059437R1 E4H/f3200 Air Circuit Breaker?

The ABB 1SDA059437R1 is a high-performance SACE Emax E4H/f air circuit breaker (ACB) designed for protection, switching and isolation in demanding high-current low-voltage distribution systems. Identified by ABB as E4H/f3200PR121/P-LIIn=3200A4pW, this four-pole withdrawable circuit breaker moving part combines a substantial 3200 A rated current with the PR121/P-LI electronic overcurrent release.

The E4H/f configuration incorporates a full-size neutral pole, making the breaker suitable for four-pole distribution systems where the neutral requires the same current-carrying capacity as the phase poles. The PR121/P-LI trip unit provides long-time overload and instantaneous short-circuit protection, while the E4H performance class delivers high fault interruption capability for critical industrial and commercial power systems.

The 1SDA059437R1 is supplied as a four-pole withdrawable moving part for use with a compatible ABB SACE Emax fixed part. Its withdrawable construction supports isolation, inspection and servicing, while four auxiliary contacts and circuit-breaker open/closed position indication facilitate integration with switchboard control, monitoring and signalling systems.

Key Advantages

• High-capacity 3200 A ABB SACE Emax air circuit breaker.
• Four-pole configuration with full-size neutral for demanding four-wire distribution systems.
• Withdrawable moving-part design supports convenient isolation and maintenance.
• PR121/P-LI electronic overcurrent release for overload and instantaneous short-circuit protection.
• E4H high short-circuit performance level for installations with substantial prospective fault currents.
• 100 kA ultimate breaking capacity at 400–500 V AC.
• 85 kA ultimate breaking capacity at 660–690 V AC.
• Four auxiliary contacts and open/closed position indication support switchboard automation and signalling.

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.
• LI protection functions: long-time overload and instantaneous short-circuit protection.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• Designed for high-current industrial and commercial power distribution.

High-Capacity Protection for Critical Power Distribution

Air circuit breakers such as the ABB SACE 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-LI electronic release provides long-time overload and instantaneous short-circuit protection. Combined with the withdrawable construction, the 1SDA059437R1 provides a serviceable high-current protection solution that 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.