instruction manual - BHEL Bhopal
instruction manual - BHEL Bhopal
instruction manual - BHEL Bhopal
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ANNEXURE 2.3<br />
PRESSURE TESTING OF TRANSFORMER / REACTORS AT SITE<br />
1. After completion of oil filling, lock PRV and pressurise the air cell by<br />
filling nitrogen/ dry air to 5.0 p.s.i. (0.35 Kg/cm.sq.).<br />
2. Maintain above pressure for at least 12 hours.<br />
3. Inspect all joints for leakage, if any.<br />
4. Record pressure testing as given below.<br />
5. After pressure testing unlock PRV and release the nitrogen/ dry air<br />
pressure of air cell.<br />
NOTE: In case of conventional oil preservation system (without air cell)<br />
pressurise conservator by filling nitrogen/dry air in conservator .<br />
RECORD OF PRESSURE TESTING AT SITE<br />
DATE TIME<br />
1. Date & Time of testing (a) Started on ......... .........<br />
(b) Finished on ......... .........<br />
2. Initial pressure ....................................<br />
3. Pressure after 12 hours ....................................<br />
4. Leakages observed if any YES /NO<br />
location of leakages ....................................<br />
5. If leakages are observed. Same to be arrested and pressure testing<br />
is to be repeated.<br />
Prepared By Samvet Lahari, <strong>Bhopal</strong>. Phone- 5277412
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