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

Course Overview:

This course is designed to give the participants the knowledge and skills to operate, inspect, and troubleshoot outdoor high-voltage (H.V.) equipment.

It covers the potential causes of the malfunctions, the principles underlying the equipment’s maintenance, as well as the breath of tests which can be performed on switchgear, circuit breakers, grounding switches, and transformers. 

Attendees will have an opportunity to better understand the requirements and practices contained in British Standards and IEC documents pertaining to testing and maintenance H.V. Equipment. 

The course is addressed to electricity power engineers and advanced operators of a station and encompasses fundamentals of maintenance and repairs as a preventive and corrective measure in high voltage electrical systems to increase reliability of operation and efficiency.

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