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External Accessories
Rating Pl ug s and Di splay Mod ule
CAUTION: Do not attempt to install an accessory with
the breaker "Closed" or "Charged". Make certain
breaker is "Open" and " Discharged" as shown above,
otherwise, personal injury or mechanical damage
may occur.
Rating Plugs
Rating plugs provide the capability to set the ampere
rating of the breaker to meet specific applications . Avail
able rating plugs, as a function of the frame ratin g , are given
in the table on page 84 i n the Ordering I nformation section .
The procedure for i n serting and removing the rating plugs
is located on pages 1 4 -1 5 in the I n stallation Instructions
section .
Rating Plug i nstallation
70
Display Module
The Display Module provides features for allowing the user
to locally monitor the phase currents. The switch to set and
select the d isplay is accessible to the user through a hole
i n the transparent cover of the trip u n it.
Display Module
Maximum Current Demand
This feature provides a display of the m aximum current
demand since the u nit was last reset. The u n it is reset
by depressing both the phase and ground fault test
p u s h b uttons s i m u ltaneously. Phase and g ro u n d fault
pushbuttons are located on the SB Electronic Trip Unit in
the integral testing section.
Present Current Demand
This feature provides a d isplay of the present current
demands. The present current demands are calculated
averages over thirty (30) minute intervals. The user may
d isplay the most recent stored values by setting the switch
to the present demand position for the 30-minute interval.
Local Monitor Relay
This feature provides a local alarm d i splay and an output
signal for an external alarm when the average of the phase
currents exceeds the alarm set point. The d isplay auto
matically resets itself when the alarm condition ceases. The
output alarm signal is a 5-volt DC level . The signal may be
used to display an alarm on a remote indication panel or by
using an internal Systems Breaker Modular Relay (SBDMR).
The alarm set point may be set to
percent of the continuous current setting .
Load Current Meter
This feature provides a local d isplay of the present 3-phase
currents. The user may display the current value by setting
lA, 18,
lc
the switch to the
or
6_Q,
70, 80, 90, or 1 00
positions.
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