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Complete Transformer Services:
No
matter what brand of transformer you own POWER TECH can repair
or service it. Transformers like any other piece of
equipment needs a regular preventive maintenance service. Power
outages resulting from transformer failure can be costly.
Transformer failure due to a build up explosive gases can be Deadly.
Don't let your expensive electrical equipment
deteriorate because of neglect. Problems can be found and fixed with
regular inspection and servicing. Below is a summary of what POWER
TECH can do for you.
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Transformers - Liquid Filled:
A. Visual and Mechanical Inspection
 | Inspect for physical damage. Inspect impact recorder prior to
unloading transformer if applicable. |
| Compare equipment nameplate information with latest single
line diagram. |
| Verify proper auxiliary device operation such as fans, pumps,
sudden pressure device, indicators, tap changer, and gas
pressurization system. |
| Check tightness of external bolts. |
| Check all liquid in tank and bushings for proper level. |
| Perform specific inspection and mechanical tests as
recommended by manufacturer. |
B. Electrical Test
| Insulation resistance tests shall be performed winding to
winding and winding to ground. Appropriate guard circuit shall
be utilized over all bushings. |
| A dielectric absorption test shall be made winding to winding
and winding to ground. The polarization index shall be computed. |
| A turns ratio test shall be performed between windings for all
tap positions. The final tap setting is to be determined by
customer. |
| Insulating oil testing. |
| Insulation power factor test shall be made on all high and voltage
windings and bushings. Overall dielectric loss and power factor
(CH, CL, CHL) shall be determined. Underground specimen tests
(UST) shall be made on all bushings equipped with power factor
(lex) or capacitance taps. |
| (Optional) Individual exciting current tests shall be
performed on each phase in accordance with established
procedures. |
| Measure dew point and oxygen content of top gas when
applicable. |
| Perform special tests and adjustments as suggested by
manufacturer on tap changer, fan and pump control and alarm
function. |
Transformers - Dry Type:
A. Visual and Mechanical Inspection
| Inspect for physical damage. |
| Compare equipment nameplate information with latest single
line diagram. |
| Verify proper auxiliary device operation such as fans,
indicators and tap changer. |
| Check tightness of accessible bolted electrical joints. |
| Perform specific inspection and mechanical tests as
recommended by manufacturer. |
B. Electrical Test
| Insulation resistance tests shall be performed winding to
winding and winding to ground. Appropriate guard circuit shall
be utilized over all bushings. |
| A dielectric absorption test shall be made winding to winding
and winding to ground. The polarization index shall be computed. |
| A turns ratio test shall be performed between windings for all
tap positions. The final tap setting is to be determined by
customer. |
| Insulation power factor test shall be made from each winding
to winding to each other winding and from each winding to
ground. |
| (Optional) Individual exciting current tests shall be
performed on each phase in accordance with established
procedures. |
| Perform special tests and adjustments as suggested by
manufacturer on tap changer, fan and pump control and alarm
function. |
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POWER TECH offers a complete line of
Transformer Testing and Repair services. An equipped Inspection Service Vehicle operated by
an experienced POWER TECH Technician is prepared to
provide advisory technical services, perform tests and recommend
repair all on site.
Contact us with regarding your specific Transformer needs: info@ptsbtr.com.
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Copyright 2004 - Power Technical Services - All
Rights Reserved |
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