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AKR-3-50
Maintenance manual
Table Of Contents - GE AKR-3-50 Maintenance Manual
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Maintenance manual
(70 pages)
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Maintenance manual
(70 pages)
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CONTENTS
GENERAL DESCRIPTION
.
.
General
Breaker
Types
Mounting
Fused
Breakers
.
Breaker Ratings
Breaker
Description
. . . .
.
RECEIVING, HANDLING, AND
STORAGE
Receiving and
HandlinC
. .
.
Storage
BREAKER OPERATION
Putting
the Breaker in Service
Drawout
Breakers
Breaker Insertion
(Fig.
3)
Breaker Withdrawal
Stationary
Breakers
Pre-service
Check
Operating the
Breaker
Manual
Closing
Electrical
Closing
Openlng
the Breaker
Interlocks
Closing Spring
Interlock (Figs.
6A and
68).
.
Racking Mechanism
Interlocks (F'ig.
8)
Optional
Interlocks
Accessories
. .
.
Shunt
Trip
Undervoltage Device
Static
Time-delay Undervoltage
. .
.
Electric
Lockout Device
Auxiliary
Switch
BeII
Alarm
BREAKER
MAINTENANCE
.
Safety Precautions
General
Arranging the Breaker
for
Slow
Closing
Lubrication
Replacement
and
Adjustment of Components
and
Accessories .
.
.
Mechanism
(Figs. 12,
13, and
14)
. . . .
.
Mechanism Replaeement
(Figs.
15
and 16)
.
.
Latch Adjustment
Manual Handle Adjustment
Contact Maintenance
Contact Replacement
(Fig.
17)
Contact Adjustment
Components
and
Accessories
.
Auxiliary
Switch
(Fig.
18)
Shunt
Trip
and
Undervoltage
Device (Figs.
19
and
20).
.
.
Maintenance
of Static Delay Device
for
Undervoltage
(Figs.
21
and
22)
.
.
Electrical Control
C
omponents
Bell Alarm/Lockout
FiS.
26).
Drawout Mechanism
and
Interlocks .
.
.
AKRU-50 Fused
Breaker
Fuse Replacement
Open
Fuse Lockout
Device (Fig.
32)
Power Sensor
Overcument
Trip
Device
False Tripping
Caused
by
Faulty
Ground
Fault Operation
.
Testing Current
Sensors
Replacement
Magnetic
Trip
Device (Figs.
33 and
38)
.
.
Page
3
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t
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5
n
I
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t2
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l4
t4
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2l
2t
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34
34
36
Selective
Tripping
36
Time-current
Curves
3?138
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This manual is also suitable for:
Akr-3a-50
Akru-3-50
Akru-3a-50
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