High voltage tests

IEEE 43 places special emphasis on determining the insulation condition of such machines before energizing and even before conducting a high-voltage test. This can be determined by the insulation test as noted below. 

Routine tests are conducted on subsequent similar machines. The purpose of a routine lest is to ascertain that the machine is assembled correctly and will be able to withstand the appropriate high-voltage test, and will be in sound working eondition, both electrically and mechanically. As a minimum requirement these tests will consist of ... 

High voltage test techniques, for voltages higher than 1 kV 2071-1/1993 BS 921-1/1990 -... 

High voltage test techniques. Measuring systems 2071-1/1991 2071-2/1991 BS EN 60060-2/1997 ... 

Spark tester - A high voltage test unit used to detect breaks or pinholes in a lining. 

IEC 60060-2, 1995. High voltage test techniques - Measuring systems. 

ISO 2746 Vitreous and porcelain enamels Enameled articles for service under highly corrosive conditions High voltage test... 

Hardware tests earth continuity, high voltage tests... 

Usually external reference capacitors can be connected to the interface allowing an ultra-stable reference to be used if one is available. This also provides best matching of cable errors since the same type of connection cables can be used on the sample and on the reference. The reference technique is especially usefiil when using external amplifiers for high voltage tests, though the reference capacitor must be chosen with care to withstand the applied voltage level. 

Various applications are targeted by crosslinked PP. Crosslinking to a gel content of 55% proved to be beneficial for cable insulation. Both crosslinking via grafting of silanes initiated by peroxide decomposition and radiation in the presence of polyfunctional monomers result in a substantial increase of the resistance to electrical breakage in high-voltage tests. 

High-voltage tests. Tests in which the employer uses voltages of approximately 1,000 volts as a practical minimum and in which the voltage source has sufficient energy to cause injury. 

IEEE Stds 4-1995, 4a-2001 (Amendment to IEEE Standard Techniques for High-Voltage Testing), IEEE Standard Techniques for High-Voltage Testing. 

Carrying out the work in an area set aside , delineated by barriers and screens, to prevent both unauthorised access and the tester being disturbed. In some circumstances, such as high voltage test areas, the barriers should be interlocked to prevent access while the unit is energised. People at different work stations on a test bench should be separated by insulating screens. 

Accompaniment of the tester in high risk situations such as high voltage testing of switchgear and other equipment. 

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