transformer nameplate
- Thread starter hommer
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drbond24
Senior Member
- Location
- Barboursville, West Virginia
That is a very general question. You might do better to quote the actual information you are concerned with and let us disect it from there. I'll give it a try anway, though. The important stuff is:
1. the kVA rating. This tells you the capacity of the transformer.
2. primary and secondary voltages. This tells you what output voltage you will have with a given input voltage.
3. winding orientation (i.e. delta vs wye). This tells you how the windings are inter-connected.
1. the kVA rating. This tells you the capacity of the transformer.
2. primary and secondary voltages. This tells you what output voltage you will have with a given input voltage.
3. winding orientation (i.e. delta vs wye). This tells you how the windings are inter-connected.
Pierre C Belarge
Senior Member
- Location
- Westchester County, New York
hommer said:
Hommer
Go to the transformer websites, and you can find some very good information that may help you.
www.solaheviduty.com
www.jeffersonelectric.com
www.acmepowerdist.com
You can also go to GE and SQD sites for more info.
1stYearElectrican
Member
- Location
- Newfoundland, Canada
http://www.transformerthailand.com/images/150_24_dd0.jpg
There's a vast amount of differnent types of 3 Phase transformers but they are basically all designed to do the same thing, to step up or step down the Voltage for transmission or for use.
~FyE~
There's a vast amount of differnent types of 3 Phase transformers but they are basically all designed to do the same thing, to step up or step down the Voltage for transmission or for use.
~FyE~
zog
Senior Member
- Location
- Charlotte, NC
(Look at the attached picture)
Top The manufacturer (optional) and the name of the equipment, in simplified terms
KVA Kilovolt-ampere ratings are based on the type of cooling class and the desired temperature rise.
Class OA: Oil-Immersed, self-cooled
Cont. Rise 55/65 oC are two ratings at which the transformer can operate continuously. The higher the temperature allowed, the higher the rating. It should be noted that a high ambient temperature rise on hot days could shorten transformer life.
HV 24,900. The primary line-to-line nominal voltage
LV 480Y / 277. The secondary Wye connection voltage, line-to-line / line-to-neutral (single phase).
% IZ 5.7% impedance voltage at 75 oC
MFG DATE Manufacturing date
BIL Basic Impulse Level of windings.
HV/LV AL/AL. The conductors are aluminum.
CONDUCT
NOTES The note section in this transformer declares that PCB contamination is less than one (1) parts per million (PPM).
APPR. Weights are critically important when installing, moving, or
WEIGHTS un-tanking the transformer.
TAP This box shows the no-load tap changer positions A - E for the line (high voltage) input to the transformer. 24,940 is in the center (C).
MAX AMPS Based on 840KVA. Varies inversely with the voltage setting of the tap.
DIAGRAMS The diagrams show (1) connection scheme, (2) angular displacement, and (3) physical bushing arrangement as viewed from the top
Top The manufacturer (optional) and the name of the equipment, in simplified terms
KVA Kilovolt-ampere ratings are based on the type of cooling class and the desired temperature rise.
Class OA: Oil-Immersed, self-cooled
Cont. Rise 55/65 oC are two ratings at which the transformer can operate continuously. The higher the temperature allowed, the higher the rating. It should be noted that a high ambient temperature rise on hot days could shorten transformer life.
HV 24,900. The primary line-to-line nominal voltage
LV 480Y / 277. The secondary Wye connection voltage, line-to-line / line-to-neutral (single phase).
% IZ 5.7% impedance voltage at 75 oC
MFG DATE Manufacturing date
BIL Basic Impulse Level of windings.
HV/LV AL/AL. The conductors are aluminum.
CONDUCT
NOTES The note section in this transformer declares that PCB contamination is less than one (1) parts per million (PPM).
APPR. Weights are critically important when installing, moving, or
WEIGHTS un-tanking the transformer.
TAP This box shows the no-load tap changer positions A - E for the line (high voltage) input to the transformer. 24,940 is in the center (C).
MAX AMPS Based on 840KVA. Varies inversely with the voltage setting of the tap.
DIAGRAMS The diagrams show (1) connection scheme, (2) angular displacement, and (3) physical bushing arrangement as viewed from the top
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