Eaton Cutler-Hammer Digitrip RMS 510 Instructions Manual page 32

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SECTION
8
TESTING RETROFITTED
BREAKERS
8.1
Dielectric and Meggar Testing
REFER TO SECTION 1, ENTITLED "GENERAL
INFORMATION AND SAFETY PRECAUTIONS",
AND REVIEW ALL THE DIRECTIONS SET
FORTH IN THAT SECTION PRIOR TO STARTING
ANY TESTING PROCEDURE. FAILURE TO
FOLLOW THE SAFE PRACTICES RECOM-
MENDED IN SECTION
1
GOULD RESULT
IN
PERSONAL INJURY DEATH, AND
/
OR EQUIP-
MENT DAMAGE. TESTING SHOULD ONLY BE
CARRIED OUT BY PERSONNEL FAMILIAR
WITH THE HAZARDS ASSOCIATED WITH
WORKING ON POWER CIRCUIT BREAKEFS
AND SWITCHGEAR ASSEMBLIES.
I
crurroru
TO AVOID POSSIBLE DAMAGE TO THE TRIP
UNIT, PERFORM THE FOLLOWING TWO STEPS
BEFORE APPLYING MORE THAN 6@ VOLTS TO
A BREAKER RETROFITTED WITH A DIGITRIP
RMS TRIP SYSTEM.
1.
Disconnect the white plug from the
Potential Transformer (PT)
Module. This
action disconnects the Breaker Primary
Voltage from the Trip Unit (RMS
81O,
910,
and OPTIM).
2.
For kits with a Breaker Mounted Control
Power Transformer (CPT),
disconnect it
from the Breaker
by removing the
two
in-
line fuses from
the system voltage wires.
8.2
Trip System Testing
-
General Notes
Each Retrofitted Breaker must be tested using
the Primary lnjection method to confirm the
entire system operation (including Sensors)
prior to installation.
Use the test settings
shown
in
Table 8-1
.
Once the Breaker has been tested using the
Primary lnjection method, the Self-Test or the
Secondary lnjection method may be used for
subsequent preventative maintenance testing.
lf
you wish to test the Trip Unit
at
the
customer's settings, then we suggest using
Cutler-Hammers Digitest software program,
which will facilitate any combination of
settings.
Please call Cutler-Hammer at
1-800-937-5487 for more information on the
Digitest program.
Each Retrofitted Breaker must be set up per the
distribution system coordination study prior to
installation.
C. Digitrip Trip Units are calibrated, sealed at the
faciory, and are not repairable. Field testing
of
the Retrofit Kits confirms that the Retrofitted
Breaker meets the published Time-Current
Curves shown in Figures 3-2, 3-3, and 3-4.
Each pick-up or time setting on Digitrip Trip Units
is
selected by choosing one position of eight on
each switch. However,
the Discriminator function
has an eight position "On
/ Off" switch. Positions
one through seven (1 -7)
are
"On" while position
eight (8)
is
"Off
" for the Discriminator function.
Each switch setting has
a
tolerance band associ-
ated with it as defined in
the Figures
3-2,3-3,
and 3-4.
B.
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