1SDA064702R1 ABB E3N 2500 PR123/DC 2500A 4 Pole Fixed Air Circuit Breaker Vertical Rear Terminals

Why Choose the ABB E3N 2500 PR123/DC 2500 A Air Circuit Breaker?

The ABB 1SDA064702R1 is a high-performance 2500 A four-pole DC air circuit breaker (ACB) designed for reliable circuit protection, electrical isolation and short-circuit interruption in demanding industrial direct current power distribution systems. As part of the ABB SACE New Emax DC range, this E3N frame circuit breaker combines robust switching technology with an advanced PR123/DC electronic overcurrent release for dependable protection of high-current DC electrical installations.

The ABB E3N 2500 PR123/DC features a fixed-mounted construction with vertical rear terminals (F VR), making it suitable for integration into industrial switchboards and DC power distribution assemblies. Its four-pole configuration supports the pole arrangements required for high-voltage DC applications, while the electronic protection unit provides adjustable protection functions to help safeguard electrical equipment against overloads and short circuits.

With a 2500 A rated current, a rated operational voltage of 1000 V DC and an ultimate short-circuit breaking capacity of 35 kA at 1000 V DC, the E3N 2500 PR123/DC is suitable for high-power DC distribution networks. The breaker also provides a 50 kA breaking capacity at 750 V DC, making it a practical choice for industrial power infrastructure requiring reliable DC circuit protection.

Key Advantages

• Heavy-duty 2500 A DC air circuit breaker for industrial electrical protection.
• Four-pole E3N configuration designed for high-current DC distribution applications.
• PR123/DC electronic overcurrent release provides adjustable circuit protection.
• 1000 V DC rated operational voltage supports demanding DC electrical networks.
• 35 kA ultimate short-circuit breaking capacity at 1000 V DC.
• 50 kA ultimate short-circuit breaking capacity at 750 V DC.
• Fixed-mounted construction with vertical rear terminals supports integration into electrical switchboards.
• Integrated auxiliary contacts and circuit breaker position indication support monitoring and control.
• Robust ABB SACE Emax construction provides dependable mechanical and electrical endurance.
• Suitable for industrial DC power distribution, energy infrastructure and high-current electrical installations.

Key Features

• ABB SACE New Emax DC circuit breaker range.
• E3N frame with N short-circuit performance level.
• 2500 A rated uninterrupted current.
• Four-pole (4P) configuration.
• Fixed-mounted (F) installation.
• Vertical rear terminals (VR) for main circuit connections.
• PR123/DC electronic protection release.
• 1000 V DC rated operational voltage.
• 35 kA Icu and Ics at 1000 V DC.
• 50 kA Icu and Ics at 750 V DC.
• 12 kV rated impulse withstand voltage.
• 1000 V rated insulation voltage.
• 20,000 mechanical operating cycles.
• 7000 electrical operating cycles at 1000 V DC.
• Four auxiliary changeover contacts for circuit breaker status indication.
• Open/closed circuit breaker position indication.
• Manual operating mechanism with optional motor operation accessories.
• Designed for industrial DC circuit protection and electrical isolation.

Technical Specifications

• Manufacturer: ABB
• Series: SACE New Emax DC
• Model: E3N 2500 PR123/DC In=2500A 4p F VR
• ABB order code: 1SDA064702R1
• Product group: New Emax DC
• Product type: DC air circuit breaker
• Frame size: E3
• Short-circuit performance level: N
• Rated current (In): 2500 A
• Rated uninterrupted current (Iu): 2500 A
• Rated operational current (Ie): 2500 A
• Rated operational voltage (Ue): 1000 V DC
• Rated insulation voltage (Ui): 1000 V
• Rated impulse withstand voltage (Uimp): 12 kV
• Current type: Direct current (DC)
• Number of poles: 4
• Mounting version: Fixed (F)
• Terminal arrangement: Vertical rear terminals (VR)
• Protection release: PR123/DC
• Release technology: Electronic (EL)
• Overload release adjustment range: 1000–2500 A
• Short-circuit release adjustment range: 3750–37,500 A
• Ultimate breaking capacity (Icu) at 750 V DC: 50 kA
• Ultimate breaking capacity (Icu) at 1000 V DC: 35 kA
• Service breaking capacity (Ics) at 750 V DC: 50 kA
• Service breaking capacity (Ics) at 1000 V DC: 35 kA
• Mechanical endurance: 20,000 operating cycles
• Electrical endurance at 1000 V DC: 7000 operating cycles
• Maximum operating frequency: 60 cycles per hour
• Power loss: 450 W
• Auxiliary contacts: 4 changeover contacts
• Position indication: Circuit breaker open/closed indication
• Motor operating mechanism: Optional accessory
• Protection rating: IP30
• Applicable standard: IEC 60947-2
• Dimensions (H × W × D): 418 × 530 × 302 mm
• Weight: Approximately 76 kg
• EAN: 8015644675950

Reliable DC Circuit Protection for Industrial Power Distribution

DC air circuit breakers such as the ABB E3N 2500 PR123/DC protect electrical distribution systems by detecting abnormal current conditions and interrupting the circuit when the configured protection thresholds are exceeded. Unlike alternating current systems, direct current circuits do not have a natural current zero crossing, making reliable arc interruption particularly important in high-voltage DC installations.

The ABB SACE New Emax DC range is engineered to address the requirements of industrial direct current networks. The E3N 2500 PR123/DC combines electronic overcurrent protection, high short-circuit breaking capacity and a robust four-pole switching arrangement. Its fixed-mounted construction and vertical rear terminals allow integration into DC switchboards, while auxiliary contacts and position indication support supervisory control and electrical system monitoring.

For fixed Emax DC circuit breakers, the standard supply arrangement uses the lower terminals. Applications requiring an upper-terminal incoming supply may require the ABB 1SDA058251R1 additional ordering code and the corresponding terminal and voltage measurement configuration.

Typical Applications

• Industrial high-current DC power distribution systems.
• DC electrical switchboards and distribution assemblies.
• Industrial rectifier and DC power conversion installations.
• Large-scale battery energy storage distribution systems, subject to system compatibility.
• DC power infrastructure and energy conversion equipment.
• Industrial automation installations using high-power DC supplies.
• Electrical protection for DC distribution feeders.
• High-voltage DC installations requiring four-pole circuit protection.
• Industrial electrical infrastructure requiring adjustable electronic overcurrent protection.
• Maintenance isolation and circuit protection within DC electrical distribution networks.