IB 6.2.7.7-3
2
TABLE OF CONTENTS
INTRODUCTION ........................................................................................................... 3
RECEIVING AND STORAGE........................................................................................ 4
INSTALLATION............................................................................................................. 4
GENERAL.................................................................................................................... 4
G
ENERAL INSPECTION................................................................................................. 5
V
ACUUM INTERRUPTER EXAMINATION .......................................................................... 5
B
ARRIER AND INSULATION INSPECTION ........................................................................ 5
I
NSTALLING FRONT BARRIER ....................................................................................... 5
M
ANUAL OPERATION FOR INSPECTION......................................................................... 5
P
ADLOCK PROVISION.................................................................................................. 6
I
NTERLOCKS ............................................................................................................... 6
I
NSTALLING CIRCUIT BREAKER INTO COMPARTMENT .................................................... 8
CIRCUIT BREAKER REMOVAL - MODEL 21.............................................................. 8
REMOVAL FROM CONNECT POSITION ....................................................................... 8
R
EMOVAL FROM TEST POSITION................................................................................ 9
R
EMOVAL FROM DISCONNECT POSITION ................................................................. 9
S
AFE OPERATIONS RECOMMENDATIONS...................................................................... 9
ADJUSTMENTS, TESTS AND PERIODIC MAINTENANCE........................................ 9
INSULATION CLEANING .............................................................................................. 10
DC M
ILLIVOLT DROP TEST / MICRO-OHM TEST.......................................................... 10
C
ONTACT WEAR AND CONTACT PRESSURE................................................................ 10
C
ONTACT GAP .......................................................................................................... 10
Contact Gap Check............................................................................................... 11
C
ONTACT SEQUENCING............................................................................................. 11
C
LOSING AND OPENING TIMES .................................................................................. 12
C
LOSING AND OPENING SPEEDS................................................................................ 12
Operating Mechanism .......................................................................................... 13
Trip Latch Engagement (Bite).............................................................................. 13
C
ONTROL DEVICE ..................................................................................................... 13
C
LOSE LATCH ROD RELEASE TRAVEL ....................................................................... 14
L
UBRICATION ............................................................................................................ 13
D
IELECTRIC TESTS.................................................................................................... 13
ELECTRICAL CHARACTERISTICS OF CONTROL DEVICES................................ 14
DC AND AC CLOSING OPERATING SEQUENCE ........................................................... 15
AC C
LOSING OPERATING SEQUENCE ........................................................................ 15
GROUND AND TEST DEVICES ................................................................................. 17
RENEWAL PARTS...................................................................................................... 17
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