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FIST 3-30 TRANSFORMER MAINTENANCE· PDF fileIf transformer is gas filled (nitrogen [N2]), check pressure gage against data sheets; never allow gas pressure to fall below 1 pound per square inch (psi). Check loading and compare with nameplate rating. Functionally test fans and controls for proper operation. Functionally test temperature alarms and annunciator points.
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Electrical switchgear safety: A guide for owners and users· PDF fileIt does not cover direct current (dc) switchgear, low-voltage switchgear (voltages up to 1000 volts ac) and switchgear used on single-phase ac traction systems. Although switchgear is generally reliable and performs well, failures, though rare, may be catastrophic. Rupturing of oil-filled switchgear …
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