How to understand the Rating of this transformer

  • Thread starter Thread starter RITESHH KAKKAR
  • Start date Start date
  • Tags Tags
    Rating Transformer
Click For Summary

Discussion Overview

The discussion revolves around understanding the rating and winding configuration of a specific transformer. Participants inquire about the transformer's specifications, including its power rating, winding method, and operational characteristics.

Discussion Character

  • Technical explanation, Conceptual clarification

Main Points Raised

  • One participant states that the nameplate indicates a rating of 7.5 KVA.
  • Another participant describes the winding configuration as Delta primary and Wye secondary, referencing the nameplate for this information.
  • A participant provides detailed specifications, including maximum continuous AC power rating, primary and secondary voltages, winding structure, percent impedance, insulation class, cooling method, and likely usage.
  • Some participants express curiosity about the winding method, with repeated inquiries about how it is done.

Areas of Agreement / Disagreement

Participants generally agree on the transformer's rating and some specifications, but there are multiple inquiries about the winding method, indicating a lack of consensus on that aspect.

Contextual Notes

Some details about the transformer's operational characteristics and usage are provided, but there may be assumptions regarding the understanding of transformer configurations that are not explicitly stated.

RITESHH KAKKAR
Messages
16
Reaction score
0
Hello
How to know the rating of this transformer
 

Attachments

  • rtgty.jpg
    rtgty.jpg
    68.3 KB · Views: 419
Engineering news on Phys.org
The name plate says 7.5 KVA. That is the rating.
 
  • Like
Likes   Reactions: Fisherman199
Hello
How the Winding is done in it what is the method
 
RITESHH KAKKAR said:
Hello
How the Winding is done in it what is the method
Delta primary, Wye secondary - It’s all there on the plate...
 
RITESHH KAKKAR said:
Hello
How to know the rating of this transformer

The Maximum continuous AC Power rating: 7.5kVA
Primary Voltage: 460VAC
Secondary Voltage: 230 L-L; 133 L-N
Can be tapped to provide either: 105.0%, 100.0%, or 95.0% of primary nominal voltage.
Winding Structure: Delta/G-Wye
Percent Impedance at 170 C (normal operating temperature): 3.3%
Insulation class: 220 (220 C will be the maximum winding temperature when in service. Hotter than that and something is wrong.)
Cooling Method: AA (Ambient Air)
Most likely usage: Isolation for an electric motor (hence the strange primary voltage and delta primary winding.)
 
Last edited:
  • Like
Likes   Reactions: krater

Similar threads

Maximum power from a transformer
  • · Replies 8 ·
Replies
8
Views
3K
Help in understanding current ratings of wires from datasheets
  • · Replies 10 ·
Replies
10
Views
2K
Sizing an Isolation Transformer for a DC Power Supply
  • · Replies 8 ·
Replies
8
Views
3K
Question about the power rating of a transformer
  • · Replies 12 ·
Replies
12
Views
2K
Fourier transform of PSD
  • · Replies 4 ·
Replies
4
Views
2K
MMF diagrams of transformer construction options
  • · Replies 9 ·
Replies
9
Views
2K
Laplace transform vs phasor analysis in circuit analysis
  • · Replies 3 ·
Replies
3
Views
2K
How to wind a 5K audio tube amplifier transformer?
  • · Replies 9 ·
Replies
9
Views
3K
Step down transformers used in residential AC Mains distribution
  • · Replies 2 ·
Replies
2
Views
1K
How to get the fuse rating you need for a DC power supply
  • · Replies 3 ·
Replies
3
Views
5K