ABB E4.2N 4000 Ekip Touch LSI 3P Fixed Air Circuit Breaker Rear Horizontal 4000A

The ABB E4.2N 4000 Ekip Touch LSI 3P F HR is a fixed three-pole air circuit breaker designed for high-current low-voltage distribution systems.

This configuration is built for 4000 A applications and uses rear horizontal terminals for switchboard layouts with rear busbar connections. It is suitable for main incomers, bus couplers, and high-capacity feeder circuits where the panel design requires a fixed breaker rather than a withdrawable unit.

The Ekip Touch LSI electronic trip unit provides long-time overload protection, short-time delay protection, and instantaneous short-circuit protection. This makes the breaker suitable for selective protection coordination in industrial and commercial power distribution systems.

Unlike a molded-case circuit breaker or motor protection device, this Emax 2 model is intended for main low-voltage switchgear assemblies with high continuous current requirements.

Key Features

4000 A rated current

Three-pole fixed air circuit breaker

Rear horizontal terminal connection

Ekip Touch LSI electronic trip unit

Long-time overload protection

Short-time short-circuit protection

Instantaneous short-circuit protection

690 VAC operational voltage

66 kA breaking capacity up to 690 VAC

66 kA short-time withstand current for 1 second

Four auxiliary changeover contacts

Suitable for high-current switchboard installations

Typical Applications

Main incoming circuit breakers

Large industrial switchboards

Power distribution centers

Generator distribution panels

Transformer secondary protection

High-capacity feeder circuits

Commercial building electrical infrastructure

Process plant low-voltage systems

Installation Notes

Install this fixed breaker in a compatible Emax 2 switchboard assembly with the correct rear horizontal busbar arrangement.

Before replacement, verify the original Product ID, pole number, fixed mounting configuration, terminal orientation, trip-unit type, and protection settings.

Protection coordination and trip settings should be configured by qualified electrical personnel based on the upstream and downstream protection scheme.

Do not describe this model as a withdrawable breaker, four-pole breaker, molded-case circuit breaker, or motor starter.

FAQ

Q

Is this a fixed or withdrawable breaker

A

It is a fixed air circuit breaker

Q

How many poles does this model have

A

It has three poles

Q

What does LSI mean

A

LSI means long-time overload protection, short-time short-circuit protection, and instantaneous short-circuit protection

Q

What is the rated current

A

The rated current is 4000 A

Q

What does HR mean

A

HR indicates rear horizontal terminal connection