29
Instructional Leaflet
IL70C1037H05
Effective October 2009
Digitrip models 520, 520i; and 520M, 520Mi,
520MC, 520MCi trip units for use only in
Magnum and Magnum DS circuit breakers
eaton corporation
www.eaton.com
Section 6: trip unit battery
Gtntral
The battery plays no part in the protection function of the trip unit.
As indicated in
Figurt 15
, the battery is provided to maintain the red
LED indication of the cause of trip. The battery is located under the
rating plug door. A Battery Check pushbutton and a green Battery
Check LED is also provided. On the initial installation of the circuit
breaker, pull to remove battery and discard the insulating tab and
then replace battery (see
Figurt 43
). This will activate the battery.
Check the battery status by depressing the Battery Test pushbutton.
Figurt 43. Digiorip Baootry
Baootry chtck
The battery is a long-life, lithium, camera-type unit. Check the status
of the battery at any time by pressing the Battery Check pushbutton
and observing the green LED. If the Battery Check LED does not
light green, replace the battery. The condition of the battery has
no effect on the protection function of the trip unit. Even with the
battery removed, the unit will still trip the breaker in accordance with
its settings. However, without the battery, the Cause of Trip LED will
not flash red. If the battery is replaced, one or more of the Cause of
Trip LEDs may be illuminated. Push the Reset/Battery Test button to
turn off the indicators; the trip unit will be ready to indicate the next
cause of trip.
Note:
N
A healthy battery is required to fully reset the 4-bit latch chip and
associated Cause of Trip LEDs (see
Figurt 15
).
Insulating Tab
Rating Plug Door Flipped Open
Use Type 1/3 N Lithium
Battery Only
Pull to Remove Battery
Pull Out After Installation
Baootry insoallaoiNn and rtmNval
The 3V lithium cell battery (see
Figurt 43
) is easily removed and
replaced. The battery is located in the cavity adjacent to the rating
plug mounting screw, but is not part of the rating plug. Insert a small
screwdriver at the left side of the rating plug, and to the left of the
word OPEN, to open the rating plug door. Remove the old battery
by pulling up on the removal tab that wraps under the battery cell.
When inserting the new cell, pay special attention to ensure that
the proper polarity is observed. The main body of the battery is the
positive (+) side.
Note:
N
The battery can be replaced at any time, even while the circuit breaker
is in-service, without affecting the operation of the circuit breaker or its
protection functions.
m
CAUTION
EXERCISE CARE WHEN REPLACING THE BATTERY TO ENSURE THAT THE
CORRECT POLARITIES ARE OBSERVED. POLARITY MARKINGS ARE SHOWN
ON THE RATING PLUG WHEN THE HINGED COVER IS OPEN. ACCIDENTALLY
INSTALLING THE BATTERY IN THE REVERSE DIRECTION WILL NOT HARM
EITHER THE TRIP UNIT OR THE BATTERY, BUT WILL DEFEAT THE FUNCTION
OF THE BATTERY.
The replacement battery should be the same type as that already in
the trip unit or an equivalent. Acceptable 3V lithium batteries may be
obtained from the following companies:
CNmpany
MNdtl
VARTA Batteries, Inc.
CR 1/3N
300 Elmsford Boulevard
Elmsford, NY 10523
914-592-2500
(www.varta.com)
Duracell, Inc.
DL 1/3N
Berkshire Corporate Park
Bethel, CT 06801
1-800-551-2355
(www.duracell.com)
Sanyo Energy Corporation CR 1/3N
2055 Sanyo Avenue
San Ysidro, CA 92173
619-661-6620
(www.sanyo.co.jp)
After replacing battery,
properly dispose.
