Why Choose the ABB 1SDA129028R1 SACE Emax 3 E6.3V 6300 Air Circuit Breaker?
The ABB 1SDA129028R1 is a SACE Emax 3 E6.3V air circuit breaker for the protection and control of low-voltage electrical distribution systems. This four-pole circuit breaker is rated at 6300 A and is fitted with an Ekip Aware LSIG trip unit, giving electronic long-time, short-time, instantaneous and earth-fault protection.
The E6.3 is the largest Emax 3 frame, intended for main incomers, generator and transformer incomers and bus couplers on very high-current switchboards. As part of the ABB SACE Emax 3 range, it combines electronic protection and monitoring with the robust construction expected of a modern air circuit breaker.
The 1SDA129028R1 is supplied as the moving part only (WMP) of a withdrawable circuit breaker. It has a rated current of 6300 A and a rated ultimate short-circuit breaking capacity of 150 kA at 415 V. The matching fixed part is ordered separately.
Key Advantages
- ABB SACE Emax 3 air circuit breaker for low-voltage power distribution.
- 6300 A rated current for high-current incoming and feeder protection.
- 150 kA Icu at 415 V short-circuit breaking capacity.
- Four-pole configuration for three-phase systems where the neutral must also be switched and protected.
- Ekip Aware LSIG trip unit with long-time, short-time, instantaneous and earth-fault protection.
- Withdrawable moving part (WMP) for use with a separately ordered fixed part.
Key Features
- ABB SACE Emax 3 E6.3V frame.
- 6300 A rated current.
- Four-pole air circuit breaker.
- 150 kA rated ultimate short-circuit breaking capacity at 415 V.
- Ekip Aware LSIG electronic trip unit.
- Withdrawable version supplied as the moving part only (WMP).
Protection for Low-Voltage Power Distribution
Air circuit breakers such as the ABB SACE Emax 3 E6.3V interrupt fault currents and protect conductors and connected equipment from overload and short-circuit conditions. With a 150 kA breaking capacity at 415 V, the 1SDA129028R1 suits installations with high prospective fault levels.
The Ekip Aware LSIG trip unit combines long-time (overload), short-time (selective short-circuit), instantaneous and earth-fault protection, supporting discrimination with downstream devices in modern distribution systems.
The withdrawable construction lets the moving part be racked out of its fixed part, which supports inspection, maintenance and replacement without disturbing the busbar connections in compatible switchgear.
Typical Applications
- Main incoming protection in low-voltage switchboards.
- High-current outgoing feeders.
- Industrial power distribution installations.
- Commercial and infrastructure electrical systems.
- Withdrawable switchgear assemblies.
