KRB-5404
1. SAFETY NOTICES
5
2. RECEIVING AND HANDLING
7
2-1. Transportation Precautions
7
2-1-1. Transporting the ACB
7
2-1-2. Transporting the breaker body
8
2-1-3. Transporting the draw-out cradle
8
2-2. Storage Precautions
8
2-3. Installation Precautions
9
3. GENERAL
16
3-1. Types and Descriptions
16
3-2. Parts and Functions
20
3-3. Circuits and Ratings
24
4. OPERATION
31
4-1. Charging and Opening operation
31
4-1-1. Charging operation
31
4-1-2. Closing operation
32
4-1-3. Opening operation
32
4-1-4. Motion of trip indication and spring charge
indication switches
32
4-1-5. Motion of operation mechanisms
33
4-2. Draw-out and Insertion Operation
35
4-2-1. General
35
4-2-2. Draw-out operation
36
4-2-3. Putting the breaker body back into the draw-out
cradle
37
4-2-4. Contact status of auxiliary and position switches 39
4-3. ON-OFF Button Cover Locking Procedure
39
4-4. Lock in OFF Procedure
40
4-5. Position Lock Lever Locking Procedure
40
4-6. Breaker Fixing Bolt Securing Procedure
41
4-7. OCR Cover Locking Procedure
41
5. OVERCURRENT RELEASE (OCR)
42
5-1. Specifications
42
5-2. Characteristics
44
5-2-1. L characteristic for general feeder
44
5-2-2. R characteristic for general feeder
47
5-2-3. S characteristic for generator protection
51
5-3. OCR Setting Procedure
53
5-3-1. OCR Setting Procedure (AGR-11B type)
53
5-3-2. OCR Setting Procedure (AGR-21B,22B,31B type)
54
5-3-2-1. General
54
5-3-2-2. Available screens
55
5-3-2-3. Monitor screen
57
5-3-2-3-1. Monitor screen (AGR-21B,22B)
57
5-3-2-3-2. Monitor 1 screen (AGR-31B)
58
5-3-2-3-3. Monitor 2 screen (AGR-31B)
59
5-3-2-4. Setup screen
61
5-3-2-4-1. Setup screen(AGR-21B,22B)
61
5-3-2-4-2. Setup screen(AGR-31B)
63
5-3-2-5. Reset screen
66
5-3-2-5-1. Reset screen (AGR-21B,22B)
66
5-3-2-5-2. Reset screen(AGR-31B)
67
5-3-2-6. Setting 1 screen
68
5-3-2-7. Setting 2 screen
70
5-3-2-8. Maintenance screen
73
5-4. OCR Function Check
74
5-5. Operation Indication and Indication Resetting
Procedure
76
5-5-1. Operation Indication (AGR-11B type)
76
5-5-2. Operation Indication and Indication Resetting
Procedure (AGR-21B,22B,31B type)
77
6. MAINTENANCE, INSPECTION AND PARTS
REPLACEMENT
79
6-1. Inspection Procedures
80
6-2. Parts Replacement Procedure
83
6-2-1. Preparation
83
6-2-2. Arc chambers
86
6-2-3. Stationary contact
87
6-2-4. Moving contact
89
6-2-5 Latch release coil (LRC)
91
6-2-6. Shunt trip device (SHT)
92
6-2-7. Control relay
93
6-2-8. Magnet hold trigger (MHT)
96
6-2-9. Auxiliary switches
97
7. TROUBLESHOOTING FLOWCHARTS
99
8.DOOR INTERLOCK
102
9. MECHANICAL INTERLOCK DEVICE. (HORIZONTAL
TYPE)
104
TABLE OF CONTENTS