Live working. Phase comparators - Capacitive type to be used for voltages exceeding 1 kV a.c.
Live working. Phase comparators - Capacitive type to be used for voltages exceeding 1 kV a.c.
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1 Scope This part of IEC 61481 is applicable to portable phase comparators of capacitive type to be used on electrical systems for voltages exceeding 1 kV a.c. and frequencies of 50 Hz and/or 60 Hz. This standard is applicable to:
• single-pole phase comparators of capacitive type operating with a memory system up to 36 kV a.c.,
• two-pole phase comparators of capacitive type operating with a wireless connection up to 245 kV a.c.
This standard is applicable to phase comparators of capacitive type used in contact with the bare conductive parts to be compared:
• as a complete device including its insulating element or
• as a separate device, adaptable to an insulating stick which, as a separate tool, is not covered by this standard.
NOTE Some parts such as the contact electrode or the insulating element of a phase comparator as a complete device may be dismantled.
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Упомянутые в описании и другие стандарты BS