Doble TDR900 User Guide
72A-2612-01 Rev. A 09/06
9
Chapter 3
Safety and Personnel
3.1 Safety
Safety cannot be overemphasized when working on or around high voltage electrical
apparatus. Companies that generate, transmit, distribute, or utilize high voltage electricity
should, and do, have precise rules for safe practices and procedures for personnel whose
working responsibilities involve testing and maintaining the various types of high voltage
apparatus, and their associated lines, cables and conductors, as well as the associated
accessories.
3.2 General Rules
Disconnect the breaker under test from the system unless an on-line test is performed.
The test crew must make a visual check to ensure that the apparatus terminals are isolated
from the power system. Because the apparatus under test may fail, precautions (such as
barriers or entrance restrictions to the test area) must be taken to avoid harm in the event
of a violent failure.
All of your company rules for safe practice in testing must be strictly conformed to,
including all practices for tagging and isolating apparatus during testing and maintenance
work. State, local, and federal regulations, e.g., OSHA, HSE, may also apply.
Note: Company rules and government regulations take precedence over Doble
recommendations. Personal Protective Equipment suitable for electrical testing of
transformers is recommended.
3.3 Grounding
The apparatus under test and the Doble TDR900 Instrument must be solidly and
commonly grounded or earthed. This also applies to any mobile equipment being tested.
See Figure 9 for an example of a safety ground connection.
To Next Page
Loading...
