Brochure

PowerPact H-, J-, and L-Frame Circuit Breakers
General Information
13
02/2016
© 2011–2016 Schneider Electric
All Rights Reserved
Mission Critical Circuit Breakers
The PowerPact
™
J- and L-Frame Mission Critical circuit breakers deliver high levels of selective
coordination in a flexible design that can be easily configured for a variety of applications. Tested to be
selectively coordinated with the QO
™
family of miniature circuit breakers and the ED, EG, and EJ
circuit breakers, this solution provides peace of mind when power availability is critical.
An electronic trip unit provides adjustable long-time settings in three sensor sizes, allowing coverage
from 70 through 600 A on 120-240, 208Y/120, 240, and 480Y/277 V systems.
In addition to unique design attributes, the PowerPact Mission Critical circuit breakers have also
undergone rigorous testing procedures to certify the coordination with downstream circuit breakers—
combining innovative engineering with validated test results.
Apply Schneider Electric Mission Critical circuit breakers in emergency power distribution systems,
data centers, hospitals, or anywhere continuity of service is desired.
Theory of Operation
There are several dynamic forces between the PowerPact Mission Critical circuit breakers and
downstream circuit breakers when a fault occurs downstream of the branch circuit breaker. Many of
these events cannot be shown on the trip curve.
The PowerPact Mission Critical circuit breakers analyze the fault current to make decisions which
maximize selectivity with downstream circuit breakers. The trip units deploy a special selectivity delay
to allow downstream circuit breakers to clear. However, on very high faults or if the downstream circuit
breaker does not trip, the circuit breaker trips the mechanism instantaneously.
The combination of the PowerPact Mission Critical circuit breaker and downstream circuit breakers
shown in the selectivity charts in the instruction bulletin are selective due to the fact that the series
impedance and the let-through from the downstream circuit breaker does not produce enough energy
to trip the PowerPact Mission Circuit circuit breaker.
This system maximizes the interaction of the circuit breakers in series to allow selectivity.
Trip Units and Trip Curves
The PowerPact J- and L-Frame Mission Critical circuit breakers deliver high levels of selective
coordination with the QO™ family of miniature circuit breakers and the ED, EG, and EJ circuit breakers
in a flexible design that can be easily configured for a variety of applications. These circuit breaker can
be equipped with 3.2-W, 3.2S-W, 5.2A-W, 5.2E-W, 6.2A-W, 3.3S-W, 5.3A-W, 6.3A-2, and 6.3E-2
Micrologic trip units. See the catalog numbers and references beginning in Table 21.
The mission critical trip units have the same settings and trip curves as the standard trip units
described in this document.
For more information see the trip unit user guides 48940-310-01 and 48940-312-01 on the Schneider
Electric website.
Ratings Available Configurations
UL 489 Listed
CSA Certified
Voltage: 480Y/277 V
• I-Line mounting
• Main circuit breaker in NQ and NF panelboards
• Unit mount for OEM users
• Plug-in base for OEM users
• Drawout base for OEM users