Safe access to a power transformer during vacuum filling.
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My question is aimed at safety.
is it considered safe at any point to access the top of a transformer undergoing the vacuum filling procedure?
The transformer OEM states to access the top of the tank (under deep vacuum) and close the main tank/OLTC chamber equalising valve once the oil has reached the correct level in the OLTC conservator, surely it would be safer to use a manifold at low level with a line connecting the main tank and one to the OLTC, with the equalising valve closed.
u/Active_Salt_9917 — 3 days ago