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Instructional Literature
Page 14
Effective: May 2005
6. Setting and Testing the RSM
Step 1: Setting the Reduction Setting
Note: For RSM actual settings, consult a qualified power systems engineer
to determine the RS.
ONLY QUALIFIED PERSONS, AS DEFINED IN THE NATIONAL ELEC-
TRIC CODE, WHO ARE FAMILIAR WITH THE INSTALLATION AND
MAINTENANCE OF POWER CIRCUIT BREAKERS AND THEIR ASSOCI-
ATED SWITCHGEAR ASSEMBLIES SHOULD PERFORM ANY WORK
ASSOCIATED WITH THESE BREAKERS.
Sections 1.2 and 1.3 show the typical method used to calculate
the RS.
A. All selected RS should be confirmed through primary injection
testing.
B. See Appendix B for a Sample Test Data Sheet.
Figure 30. Selecting the RSM Reduction Setting. R1=Min.
Reduction, R5=Max. Reduction.
Step 2: Testing
Turn the mode selector switch to the "Continuity Test" position.
If the unit is wired correctly, the indicator light will illuminate while
it is held in this position. Release the mode selector knob and it
should automatically return to the "Normal" position.
PERIODIC TESTING OF THIS DEVISE IS REQUIRED.
THE CUSTOMER IS RESPONSIBLE FOR PERIODIC MAINTENANCE
AND FUNCTIONALITY TESTING OF THIS DEVISE. TESTING SHOULD
BE REPEATED AT A MINIMUM OF EVERY THREE YEARS TO INSURE
PROPER OPERATION.
Step 3: Final Breaker and Cell Preparation
A. Insure that no metal chips or shavings have fallen into the
breaker or cell during the installation process. If any have,
remove them.
B. Carefully rack the breaker into and out of the cell to insure
that the breaker and racking device clear all newly installed
components and harnesses.
WARNING
WARNING
WARNING
For more information visit: www.EatonElectrical.com
Arcflash Reduction Maintenance Switch
DO NOT PERFORM ANY MAINTENANCE: INCLUDING BREAKER
CHARGING, CLOSING, TRIPPING, OR ANY OTHER FUNCTION WHICH
COULD CAUSE SIGNIFICANT MOVEMENT OF THE BREAKER WHILE
IT IS ON THE EXTENSION RAILS. DOING SO MAY CAUSE THE
BREAKER TO SLIP FROM THE RAILS AND FALL, POTENTIALLY
CAUSING SEVERE PERSONAL INJURY TO THOSE IN THE VICINITY.
DO NOT LEAVE THE BREAKER IN AN INTERMEDIATE POSITION IN
THE SWITCHGEAR CELL. ALWAYS LEAVE IT IN THE CONNECTED,
DISCONNECTED, OR (OPTIONAL) TEST POSITION. FAILURE TO DO
SO COULD LEAD TO IMPROPER POSITIONING OF THE BREAKER
AND FLASHOVER, CAUSING DEATH, SERIOUS PERSONAL INJURY,
AND / OR PROPERTY DAMAGE.
Step 4: Activating the RSM
A. To activate the RSM, turn the mode selector switch to the
"Maintenance Mode" position. Close the LOTO cover, then
follow your normal LOTO procedures.
Application and Installation
WARNING
WARNING
IL01906001E
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