Safety Summary
1-28 72A-1230 Rev. F
July 22, 2005
Safety Summary
In summary, it is worth noting that many of the accidents that happen around
high voltage apparatus and its associated conductors involve personnel who
are familiar (perhaps too familiar) with high voltage equipment. Staying alert
and ever watchful requires constant training and awareness of the inherent
hazards.
The greatest hazard is the possibility of getting on a “live” circuit. To avoid
this requires constant vigilance – for oneself and for one's fellow workers.
In addition to the obvious dangers, personnel should be alert to recognize
subtle dangers as well. For example, during transformer excitation-current
tests, the “floating” terminals may have significant voltages induced in them
by simple transformer action. Thus, all terminals of an apparatus under test,
unless grounded, should be considered to be “live” while the test is in
progress.
In the case of potential transformers or any transformers which may be
interconnected, voltage can be back-fed through the secondaries to produce
high voltage on the primary, although the primary is seemingly isolated from
the power system. This re-emphasizes another rule: All terminals of an
apparatus to be tested should be completely isolated.
Remember: SAFETY
.........................FIRST, LAST, ALWAYS!
To Next Page
Loading...
Need help?
General
