High Voltage Laboratory Design:
Classification of High Voltage Laboratories : Classification of High Voltage Laboratories depending on the purpose for which they are intended and the resources (finances) available, can be classified into four types. Small laboratories Medium size laboratories Large general purpose laboratories UHV laboratories Some salient features of these various types of laboratories are discussed below. 1.Small Laboratories: A small laboratory is one that contains d.c. or power frequency test equipment of less than 10 kW/10 kVA rating and impulse equipment of energy rating of about 10 KJ or less. Voltage …
Grounding of Impulse Testing Laboratories : An earth or ground system means an established stable .reference potential normally taken to be zero. There are three types of Grounding of Impulse Testing Laboratories are: the ideal ground, single point ground (Fig. 11.4a), and the bus ground (Fig. 11.4b). Of all these, the best ground is the ideal ground which cannot be realized in practice. The next preferred ground is the single point ground, and the bus ground is least satisfactory. Ideal ground can be …
High Voltage Laboratory Equipments : A High Voltage Laboratory Equipments is expected to carry out withstand and/or flashover tests at high voltages on the following transmission system equipment: Transformers Lightning arresters Isolators and circuit breakers Different types of insulators Cables Capacitors Line hardware and accessories Other equipment like reactors, etc. Different tests conducted on the above equipment are: Power frequency withstand tests—wet and dry Impulse tests c. withstand tests Switching surge tests Tests underpolluted atmospheric conditions Partial discharge and RIV measurements High current tests. In addition to the above facilities, the laboratories should also have facilities for conducting research …
High Voltage Laboratory Rating : The High Voltage Laboratory Rating and size of test equipment chosen in the h.v. laboratories depends on the test facilities to be provided. Normally, the design of the laboratories for 230 kV system voltage and below does not pose any problems, but laboratories intended for system voltages of 400 kV and above require special attention. In Tables 11.1 and 11.2 various test voltages for different transmission system voltages are given. For research and development work, the voltage levels needed …
Operation of UHV Laboratory : Operation of UHV Laboratory are designed as indoor laboratories or outdoor laboratories depending on the specific requirements. An indoor laboratory is preferred when most of the equipment testing and associated research work is carried out indoors, whereas outdoor laboratories are preferred when the electrical and mechanical parameters of the UHV transmission lines are to be experimentally determined so that the design of future lines can be based on this data. During the 1980s when the Operation of …