Brochure

PowerPact H-, J-, and L-Frame Circuit Breakers

Motor Circuit Protection

02/2016

Micrologic 1.3 M Electronic Trip Units for Instantaneous

Protection Only (L-Frame Circuit Breakers Only)

Micrologic 1.3 M trip units are used in 3-device motor-feeder solutions on PowerPact L-frame circuit

breakers with performance levels G/J/L. They provide short-circuit protection for motors up to 250 kW

at 400 V.

Micrologic 1.3 M trip units provide instantaneous protection only, using electronic technology. They are

dedicated to 600 A three-pole (3P 3D) circuit breakers or four-pole circuit breakers with detection on

three poles (4P, 3D). They are especially used in three-pole versions for motor protection.

Circuit breakers equipped with Micrologic 1.3 M trip units, without thermal protection, are used in

certain applications to replace automatic switches. Micrologic 1.3 M trip units are available on

PowerPact L-frame circuit breakers only.

NOTE: All Micrologic trip units have a transparent, sealable cover that protects access to the

adjustment rotary switches.

They also provide the benefits of electronic technology:

•

accurate settings

•

tests

•

“Ready” LED.

Circuit breakers with a Micrologic 1.3 M trip unit are combined with a overload relay and a contactor.

Protection settings are made using a rotary switch.

Protection Version

Three pole (3P): three-pole frame circuit breakers equipped with detection on all three poles.

Indications

The green “Ready” LED blinks slowly when the electronic trip unit is ready to provide protection. It

indicates the trip unit is operating correctly.

NOTE: All the trip units have a transparent sealable cover that protects access to the adjustment

rotary switches.