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IEEE 510
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IEEE 510 1983 Edition, September 17, 1983 Recommended Practices for Safety in High-Voltage and High-Power Testing
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Description / Abstract:
This recommended practice is concerned with safety practices for
those who are involved with making measurements on high-voltage
sources or with high-power sources of various types including
power-system lines, 60 Hz test transformers, direct-voltage
supplies, lightning-impulse generators, and switching-impulse
generators. This recommended practice is limited to safety
practices with regard to electrical hazards involved in temporary
measurements, as opposed to metering, relaying or routine line
work.
Considerations of safety in electrical testing apply not only to personnel but to the test equipment and apparatus or system under test. This recommended practice deals generally with safety in connection with testing in laboratories, in the field, in substations and on lines, and with the test equipment utilized. Special areas involving cable-fault location, large capacitance load testing, high-current testing, and direct connection to power lines are treated separately. For applications of high-voltage test equipment and methods in areas not specifically covered, the following general guides apply:
1) All ungrounded terminals of the test equipment or apparatus under test should be considered as energized.
2) Common ground connections should be solidly connected to both the test set and the test specimen. As a minimum, the current capacity of the ground leads should exceed that necessary to carry the maximum possible ground current. The effect of ground potential rise due to the resistance and reactance of the earth connection should be considered.
3) Precautions should be taken to prevent accidental contact of live terminals by personnel, either by shielding the live terminals or by providing barriers around the area.
4) The circuit should include instrumentation for indicating the test voltages.
5) Appropriate switching and, where appropriate, an observer should be provided for the immediate deenergization of test circuits for safety purposes. In the case of dc tests, provisions for discharging and grounding charged terminals and supporting insulation should also be included.
6) High-voltage and high-power tests should be performed and supervised by qualified personnel.
7) Consideration should be given to safety regulations which may apply to specific circumstances; for example, other IEEE guides, union, company, or government regulations (see also Appendix B).
8) In the use of signal-gathering equipment, each device should be used in such a manner that it will not present a personnel hazard should it inadvertently become a part of the high-voltage circuit, or fail to function properly.
Considerations of safety in electrical testing apply not only to personnel but to the test equipment and apparatus or system under test. This recommended practice deals generally with safety in connection with testing in laboratories, in the field, in substations and on lines, and with the test equipment utilized. Special areas involving cable-fault location, large capacitance load testing, high-current testing, and direct connection to power lines are treated separately. For applications of high-voltage test equipment and methods in areas not specifically covered, the following general guides apply:
1) All ungrounded terminals of the test equipment or apparatus under test should be considered as energized.
2) Common ground connections should be solidly connected to both the test set and the test specimen. As a minimum, the current capacity of the ground leads should exceed that necessary to carry the maximum possible ground current. The effect of ground potential rise due to the resistance and reactance of the earth connection should be considered.
3) Precautions should be taken to prevent accidental contact of live terminals by personnel, either by shielding the live terminals or by providing barriers around the area.
4) The circuit should include instrumentation for indicating the test voltages.
5) Appropriate switching and, where appropriate, an observer should be provided for the immediate deenergization of test circuits for safety purposes. In the case of dc tests, provisions for discharging and grounding charged terminals and supporting insulation should also be included.
6) High-voltage and high-power tests should be performed and supervised by qualified personnel.
7) Consideration should be given to safety regulations which may apply to specific circumstances; for example, other IEEE guides, union, company, or government regulations (see also Appendix B).
8) In the use of signal-gathering equipment, each device should be used in such a manner that it will not present a personnel hazard should it inadvertently become a part of the high-voltage circuit, or fail to function properly.