1SDA056922R1 ABB E4V4000 PR121/P-LSIG 4000 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E4V4000 PR121/P-LSIG Air Circuit Breaker?

The ABB 1SDA056922R1 is a high-performance SACE Emax E4V air circuit breaker designed for switching and comprehensive protection in high-current low-voltage electrical distribution systems. Identified as E4V4000 PR121/P-LSIG, this four-pole fixed circuit breaker combines a 4000 A rated current with ABB's PR121/P-LSIG R4000 electronic overcurrent release.

As part of the ABB SACE Emax / New Emax range, the E4V4000 is engineered for installations with very high prospective fault currents. Its V short-circuit performance level provides ultimate and service short-circuit breaking capacities of 150 kA at 400 V AC, 130 kA at 500 V AC and 100 kA at 690 V AC. The fixed construction with rear horizontal terminals provides a robust arrangement for permanent integration into compatible low-voltage switchboards.

The integrated PR121/P-LSIG R4000 electronic trip unit provides long-time overload (L), short-time short-circuit (S), instantaneous short-circuit (I) and ground-fault (G) protection. With a rated operational voltage of 690 V AC, four-pole configuration and 4000 A rated uninterrupted current, the 1SDA056922R1 is well suited to critical main incoming, feeder and distribution protection duties requiring very high breaking capacity and comprehensive electronic protection.

Key Advantages

• High-capacity 4000 A air circuit breaker for demanding low-voltage power distribution.
• Four-pole configuration suitable for three-phase four-wire electrical systems.
• PR121/P-LSIG R4000 electronic trip unit provides long-time, short-time, instantaneous and ground-fault protection.
• Exceptional 150 kA Icu and Ics at 400 V AC short-circuit breaking performance.
• Maintains 130 kA Icu and Ics at 500 V AC and 100 kA Icu and Ics at 690 V AC.
• 100 kA short-time withstand current for 1 s and 75 kA for 3 s.
• Fixed construction with rear horizontal terminals for permanent switchboard installation.
• Fitted with four auxiliary contacts and circuit breaker open/closed position indication.

Key Features

• ABB SACE Emax E4V series.
• 4000 A rated operational and uninterrupted current.
• Four-pole circuit breaker configuration.
• PR121/P-LSIG R4000 electronic overcurrent release.
• Long-time overload (L) protection.
• Short-time short-circuit (S) protection.
• Instantaneous short-circuit (I) protection.
• Ground-fault (G) protection.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 150 kA Icu and Ics at 400 V AC.
• 130 kA Icu and Ics at 500 V AC.
• 100 kA Icu and Ics at 690 V AC.
• Fixed design with rear horizontal terminals.

Very High Breaking Capacity with Comprehensive LSIG Protection

The ABB E4V4000 is designed for substantial low-voltage distribution systems where exceptionally high prospective fault currents require robust interruption capability. Its V performance level delivers ultimate and service short-circuit breaking capacities of 150 kA from 220–440 V AC, 130 kA at 500 V AC and 100 kA at 660–690 V AC, together with short-time withstand capabilities of 100 kA for 1 s and 75 kA for 3 s.

The PR121/P-LSIG electronic release combines long-time overload, short-time short-circuit, instantaneous short-circuit and ground-fault protection. This comprehensive protection arrangement helps protect conductors, busbars, switchgear and connected equipment against multiple electrical fault conditions. Combined with its 4000 A rating and four-pole fixed construction, the 1SDA056922R1 is suited to critical power distribution systems where high breaking performance and integrated ground-fault protection are required.

Typical Applications

• Main incoming circuit protection in high-current low-voltage switchboards.
• Three-phase four-wire electrical distribution systems.
• Industrial power distribution systems with very high prospective fault currents.
• Transformer secondary distribution and protection.
• Protection of high-current distribution feeders and busbar systems.
• Electrical systems requiring integrated ground-fault protection.
• Large commercial, infrastructure and manufacturing installations.
• High-fault-level switchgear and critical power distribution assemblies.