1SDA056992R1 ABB E6H 5000 PR121/P-LI 5000 A 3-Pole Withdrawable Air Circuit Breaker Moving Part

Why Choose the ABB 1SDA056992R1 E6H 5000 Air Circuit Breaker?

The ABB 1SDA056992R1 is a high-capacity SACE Emax E6H 5000 air circuit breaker (ACB) moving part designed for protection and switching in demanding high-current low-voltage electrical distribution systems. Part of the ABB New Emax / SACE Emax range, this three-pole withdrawable circuit-breaker moving part combines a 5000 A rated current with the PR121/P-LI electronic overcurrent release.

The PR121/P-LI electronic trip unit provides long-time overload and instantaneous short-circuit protection. Its long-time protection setting can be adjusted across the 2000–5000 A range, while instantaneous short-circuit protection is adjustable from 7500–75000 A, supporting protection settings appropriate to demanding high-current distribution applications.

With a 5000 A rated uninterrupted current, three-pole withdrawable configuration and E6H high-breaking-capacity performance, the 1SDA056992R1 is designed as the moving part of a compatible ABB SACE Emax withdrawable circuit-breaker assembly. Its rated ultimate short-circuit breaking capacity is 100 kA at 400 V AC, 50 Hz, making it suitable for installations with substantial prospective fault currents.

Key Advantages

• High-capacity 5000 A air circuit breaker moving part for demanding low-voltage power distribution.
• Three-pole withdrawable configuration for compatible ABB SACE Emax switchgear assemblies.
• PR121/P-LI R5000 electronic overcurrent release provides overload and instantaneous short-circuit protection.
• 100 kA ultimate short-circuit breaking capacity at 400 V AC, 50 Hz.
• Adjustable long-time overload setting from 2000–5000 A.
• Adjustable instantaneous short-circuit setting from 7500–75000 A.
• Withdrawable construction supports convenient inspection, servicing and replacement within compatible switchgear.
• Four auxiliary contacts provide circuit-breaker open/closed status signalling.

Key Features

• ABB SACE Emax E6H 5000 series.
• 5000 A rated uninterrupted current.
• Three-pole circuit-breaker configuration.
• Withdrawable moving part construction.
• PR121/P-LI R5000 electronic overcurrent release.
• Long-time (L) overload protection.
• Instantaneous (I) short-circuit protection.
• 100 kA Icu at 400 V AC, 50 Hz.
• Overload release setting range of 2000–5000 A.
• Instantaneous short-circuit release setting range of 7500–75000 A.
• Two normally open and two normally closed auxiliary contacts.
• Circuit-breaker open/closed position indication.
• Optional motor operation supported.
• Designed for integration with a compatible withdrawable SACE Emax fixed part.

High-Current Protection with Withdrawable Flexibility

Air circuit breakers such as the ABB SACE Emax E6H provide switching and protection for high-current low-voltage distribution networks. The electronic trip release monitors current conditions and initiates circuit interruption when configured protection thresholds are exceeded, helping protect switchgear, busbars, cables and connected equipment against potentially damaging overload and short-circuit currents.

The PR121/P-LI release combines adjustable long-time overload protection with instantaneous short-circuit protection. Together with the E6H circuit breaker's 5000 A current rating, 100 kA ultimate breaking capacity at 400 V AC and withdrawable construction, the 1SDA056992R1 is particularly suited to high-capacity main distribution and industrial switchgear where robust protection and convenient serviceability are required.

Typical Applications

• Main low-voltage electrical distribution switchboards.
• High-current industrial power distribution systems.
• Manufacturing and process plants.
• Large commercial and infrastructure electrical installations.
• Transformer secondary circuit protection.
• Main incomer protection.
• High-current feeder protection.
• Withdrawable switchgear requiring serviceable circuit-breaker assemblies.
• Electrical installations with high prospective short-circuit currents.