ABB 1SDA071821R1 E4.2N 4000 Ekip Dip LI 4p F HR

This ABB 1SDA071821R1 air circuit breaker is a four‑pole industrial air circuit breaker configured with the E4.2N platform and an Ekip Dip LI trip/control module. As an ACB circuit breaker intended for low‑voltage distribution, it combines a withdrawable frame style with electronic trip functionality to provide selective protection and convenient integration into switchgear assemblies. The product title and configuration identify it as an ABB air circuit breaker designed for installation where an electronic trip unit and multi‑pole protection are required.

In low‑voltage power distribution, this ACB circuit breaker is used at distribution boards, main incoming cubicles, and distribution bus sections where reliable fault interruption and coordinated protection are needed. The Ekip Dip LI trip unit provides adjustable protection features and local control/interface functions, making this low voltage air circuit breaker suitable for applications that require electronic protection settings, metering or simple communication capabilities. Specifying an ABB air circuit breaker with this configuration supports modular switchgear designs and simplifies maintenance through standardized control hardware.

• Brand: ABB
• SKU / Catalog Number: 1SDA071821R1
• Product Series: E4.2N
• Number of poles: 4p
• Trip unit (exact): Ekip Dip LI

Typical application areas for this ABB air circuit breaker configuration include industrial and commercial low‑voltage distribution switchgear, main incoming and distribution panels, and selective feeder protection where an electronic trip unit (Ekip Dip LI) is required. It is suitable for engineers and installers specifying air circuit breakers for coordinated protection schemes, retrofit or new switchgear installations that use withdrawable ACB frames with electronic trip functionality.