Part
12470
Rev. 2 3/25/99
i
TABLE OF CONTENTS
SECTION
PAGE
I.
INTRODUCTION ............................................................................................................. 1
A.
Specifications .............................................................................................. Bulletin
B.
General Information ............................................................................................... 1
C.
About This Manual ................................................................................................ 1
D.
Safety Precautions .................................................................................................. 2
II.
THEORY OF OPERATION .............................................................................................. 3
A.
Description of Controls .......................................................................................... 3
B.
Selection of Output Terminal ................................................................................ 6
C.
Selection of Output Leads ...................................................................................... 6
D.
Overload Capacity .................................................................................................. 7
III.
TEST PROCEDURES ....................................................................................................... 8
A.
Maintenance of Motor Overload Relays ................................................................ 8
1.
Planned Maintenance Program ................................................................. 10
2.
Time Delay ................................................................................................ 11
3.
Instantaneous Element .............................................................................. 13
B.
Maintenance of Molded Case Circuit Breakers ........................................ 15
1.
Planned Maintenance Program ................................................................. 15
2.
Thermal Element ....................................................................................... 16
3.
Instantaneous Element .............................................................................. 18
4.
Ground Fault Element ............................................................................... 19
IV.
SERVICE DATA
21
A.
Service and Repair Order Instructions .................................................................. 22
B.
Preparation for Reshipment .................................................................................. 23
C.
Operational Errors/Troubleshooting ..................................................................... 23
D.
Warranty ............................................................................................................... 25
V.
SCHEMATICS ................................................................................................................. 26
