Maintenance - HPS TITAN N Serie Installation, Fonctionnement Et Entretien

WARNING
Failure to identify and correct the root causes for the
transformer overheating can result in death or
personal injury, property damage or severely reduced
transformer life expectancy.

Maintenance

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR
ARC FLASH
Failure to de-energize, isolate and ground the
transformer terminals and to verify the ground
potential on all terminals before performing any
work on the transformer will result in serious
personal injury or death.
Inserting any objects through the ventilation
openings while the transformer is energized will
result in serious personal injury or death.
Installation, Operation, and Maintenance Guide - Encapsulated Low Voltage Transformer
and the corresponding loss of life of the transformer.
Overload that results in a reduction of life expectancy of

the transformer.
If the transformer is experiencing increased operating
temperatures, the following contributing factors should be
considered and immediately corrected:
Rigorous motor starting loads or other impact type

loading. For this type of applications a specific
transformer type is required.
Over-excitation of unit due to excess supply line voltage or

current.
Ambient temperatures above standard.

Overload beyond ANSI C57.96 guidelines.

Harmonic distortions of the supply line voltage and

currents.
Three-phase encapsulated transformers may be shut
down and stored for extended periods of time without any
deterioration. Care must be exercised to clean and dry units
prior to energization, as previously outlined. Proper packaging
and moisture prevention measures during storing are essential.
Perform insulation resistance (megger) before re-energizing.
Under normal operating conditions and environments,
three-phase encapsulated transformers require periodic care
and inspection. This is essential if the unit is installed in harsh
environmental conditions (for ex. outside, environments with
high levels of pollutants and dust, etc.).
Internal maintenance must be performed only with the
transformer de-energized, isolated and with all the
terminals grounded.
Maintenance typically includes internal cleaning,
tightening of links and bolted connections to prescribed torque
levels, servicing and inspection of auxiliary devices and an
infrared scan or thermal image of the transformer.
All bolted connections at terminals must be in good
condition. We recommend under scheduled annual
maintenance or at shorter regular intervals that connections be
checked for proper torque values and any signs or oxidation,
arching and improper electrical connection. If any improper
connections are identified they must be corrected immediately.
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