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3.3.2 Power Circuit
The power circuit consists of components installed between the input terminals and the primary winding terminals of the
main transformer:
Main switch
Mains supply cable is connected to its terminals. Works also as a safety switch.
Input surge arresters (option)
Protects the CCR from incoming voltage transients and is located next to the main switch.
Main fuse
Protects the CCR from overload caused by a possible component or regulator fault and is
located next to the main switch.
Passive filter
Suppresses emissions, also limits current transients and works as a base load for the CCR in
output short circuit use and is located at the bottom of the compartment.
Thyristor unit
Forms the desired primary Rms-voltages to produce correct output step currents (I2) by
enabling only controlled parts of the sine waves to pass through in following way:
•
Thyristor starts to conduct when ignition pulses are given to its gate
•
Thyristor closes when ignition pulses are stopped and current passing through it goes to
zero.
3.3.3 Main Transformer, Efficiency and Power Factor
The dry-type (not oil-cooled) main transformer defines the rating of the CCR. Because the transformer has load tapping on
the output the rating of the transformer can be reduced in order to match with the connected load.
Optimal load matching provides following benefits:
•
Minimizes maximum output voltage in case of open circuit or thyristor failure.
•
Efficiency of the CCR is optimized since the input current which causes most of the CCRs power losses is decreased. Power
losses generate heat which in turn causes ageing of components i.e. load matching also improves the lifetime of the CCR.
•
Power factor is optimized
•
Harmonic content of the input and output of the CCR would be as small as possible
•
Crest factor would be optimized: this may be a problem when connecting addressable light control and monitoring
systems with the CCR.
Load matching is provided from 45% to 100% with 5% and 10% taps, see
Note
If the supply voltage is higher than nominal during the tapping or lower supply voltages than 95% of nominal are
expected, some additional reserve (+5…+10%) to the tapping might be necessary to operate the CCR on highest
intensity.
IDM 8000
Introduction
14
Copyright
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Содержание IDM 8000
Страница 1: ...IDM 8000 CCR User Manual UM_IDM 8000 Rev 1 7 2021 05 06 ...
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Страница 8: ...IDM 8000 TABLE OF CONTENTS viii Copyright ADB Safegate All Rights Reserved ...
Страница 10: ...IDM 8000 List of Figures x Copyright ADB Safegate All Rights Reserved ...
Страница 12: ...IDM 8000 List of Tables xii Copyright ADB Safegate All Rights Reserved ...
Страница 18: ...IDM 8000 Safety 6 Copyright ADB Safegate All Rights Reserved ...
Страница 20: ...IDM 8000 About this Manual 8 Copyright ADB Safegate All Rights Reserved ...
Страница 76: ...IDM 8000 Troubleshooting 64 Copyright ADB Safegate All Rights Reserved ...
Страница 92: ...IDM 8000 Appendix F Parallel remote control example 80 Copyright ADB Safegate All Rights Reserved ...
Страница 100: ...IDM 8000 Appendix I Commissioning test report form 88 Copyright ADB Safegate All Rights Reserved ...
Страница 104: ...IDM 8000 Appendix J Spare part list 92 Copyright ADB Safegate All Rights Reserved ...
Страница 106: ...IDM 8000 Appendix K Components of electronics 94 Copyright ADB Safegate All Rights Reserved ...
Страница 107: ...Appendix L Appendix L CCR components UM_IDM 8000 Rev 1 7 2021 05 06 95 Copyright ADB Safegate All Rights Reserved ...
Страница 113: ...UM_IDM 8000 Rev 1 7 2021 05 06 101 Copyright ADB Safegate All Rights Reserved ...
Страница 114: ...IDM 8000 Appendix M Output Terminals 102 Copyright ADB Safegate All Rights Reserved ...
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