Engineering and Maintenance
HV Outdoor Equipment’s (CBs, CTs, VTs, CVTs, Disconnector) Design and Testing

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HV Outdoor Equipment’s (CBs, CTs, VTs, CVTs, Disconnector) Design and Testing Course
Introduction:
Course Objectives:
By completing this training course, participants will be able to:
- Causes of H.V. equipment failures
- Maintenance regulations of electrical H.V. outdoor equipment and their function of operation and installation
- Testing and maintenance of the current transformers, potential transformers, capacitive voltage transformers, and switchgear
- Different types of outdoor H.V. circuit breakers and the causes of circuit breaker failure and how to do maintenance for switchgear
- Testing the different types of circuit breakers, grounding switches, and isolating switches
Who Should Attend?
Electric power engineers and advanced operating staff of electrical stations.
Course Outlines:
- Definition of H.V. outdoor equipment’s
- Switchgear, grounding switches, isolating switches, surge arresters, current transformers, potential transformers, capacitive voltage transformers and grounding system maintenance
- H.V. outdoor equipment’s testing according to British
- Standard (BS) and IEC
- H.V. outdoor switchgear testing-breakdown causes of circuit breakers-common troubles of circuit breakers and remedial action – important checks on circuit breakers –breakdown maintenance and preventive maintenance-testing of circuit breakers according to IEC -type tests-routine tests-installation tests-maintenance tests and factory tests
- Current transformers-Principle of operation-rated current- rated burden-accuracy class-short time rating-instrument security factor-testing according to BS 3938, BS 7626 and IEC 60044-1
- Voltage transformer and capacitive voltage transformer standards- Short time ratings- testing according to BS 3938, BS 7626, and IEC 60044-1
- Maintenance and testing of disconnecting switches according to BS 3078 and IEC–ratings and their selection- voltage and insulation level- frequency- normal current- standard values- short-time withstand the current duration of the short circuit- peak withstand current- making current
- Maintenance and testing of grounding switches
- Maintenance and testing of surge arresters according to IEC
- Maintenance of H.V. outdoor circuit breakers, capacitive voltage transformers, current, and potential transformers