KEPCO JQE 150-1.5MVPY-26956 Half Rack - Manual (Page 8)

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JQE SPECIAL SVC 081111
TABLE OF CONTENTS
SECTION PAGE
4.5.5 Remote Full Scale (FS) Output Voltage Calibration ......................................................................... 4-4
4.6 Output Current Limit calibration .............................................................................................................. 4-4
4.6.1 Current Limit Pre-calibration Setup................................................................................................... 4-4
4.6.2 Zero (Minimum) Output Current Limit "B" Calibration ....................................................................... 4-5
4.6.3 Full Scale (maximum) Output Current Limit "B" Calibration.............................................................. 4-5
4.6.4 FS Current Monitor Calibration ......................................................................................................... 4-5
4.6.5 Full Scale Output Current Limit "A" Calibration................................................................................. 4-5
SECTION 5 - THEORY OF OPERATION
5.1 Simplified Diagram Discussion ............................................................................................................... 5-1
5.2 Circuit Description................................................................................................................................... 5-1
5.2.1 A-C Input Circuit................................................................................................................................ 5-1
5.2.2 Main d-c Supply ................................................................................................................................ 5-3
5.2.3 Pass-Element Section....................................................................................................................... 5-3
5.2.4 Voltage Error Amplifier (VEA) ........................................................................................................... 5-3
5.2.5 Current Limit Circuit .......................................................................................................................... 5-3
5.2.6 Overvoltage Protection Circuit and Current Monitor ......................................................................... 5-4
5.2.7 Auxiliary Supplies.............................................................................................................................. 5-4
5.2.8 Metering Circuit................................................................................................................................. 5-5
SECTION 6 - MAINTENANCE
6.1 General ................................................................................................................................................... 6-1
6.2 Disassembly/Reassembly....................................................................................................................... 6-1
6.2.1 Cover Removal ................................................................................................................................. 6-1
6.2.2 A1 Circuit Board Removal................................................................................................................. 6-1
6.2.3 A5 Terminal Block Circuit Board Removal........................................................................................ 6-2
6.2.4 A3 Heat Sink Removal...................................................................................................................... 6-2
6.2.5 A4 Overvoltage Protection Circuit Board Removal ........................................................................... 6-2
6.2.6 Reassembly. ..................................................................................................................................... 6-2
6.3 Troubleshooting ...................................................................................................................................... 6-2
6.4 Power Supply Measurements................................................................................................................. 6-4
6.4.1 Required Test Equipment. ................................................................................................................ 6-4
6.4.2 Measurement Instructions................................................................................................................. 6-5
SECTION 7 - ELECTRICAL PARTS LIST AND DIAGRAMS
7.1 General ................................................................................................................................................... 7-1
7.2 Ordering Information............................................................................................................................... 7-1
7.3 Abbreviations Used in Kepco Parts Lists................................................................................................ 7-2
7.3.1 Reference Designators ..................................................................................................................... 7-2
7.3.2 Descriptive Abbreviations ................................................................................................................. 7-2