Product Description
The Square D™ Distribution Transformer is designed to supply power throughout the building. The transformer permits the use of multiple voltages in the design of the system.
Some advantages to designing a system with low voltage transformers:
-
Distributes a voltage higher than required by the load to limit wire losses and voltage drop
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Addition of source impedance to the system, reducing common overcurrent at normal voltages
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Mitigates harmonics through an internal magnetic circuit
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Allows system grounding closer to the load, reducing capacitive noise
-
Can be designed for any output voltage that is required.
A few disadvantages to designing a system with low voltage distribution transformers:
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Reduces overall efficiency of the system due to internal losses within the transformer
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Added heat to the building if installed indoors and in the HVAC system.
The impact on the efficiency of the system and the concerns for improvements in the market for energy consumption have led to low voltage distribution transformers being regulated through the Energy Policy and Conservation Act (United States) and Natural Resources (Canada).
Below are the efficiency ratings of Three-Phase Low Voltage Dry-Type Distribution Transformers:
| Three-Phase | ||
|---|---|---|
| kVA | Efficiency (%) |
NOTE: All efficiency values are at 35% of nameplate-rated load, determined
according to the U.S. Department of Energy (DOE) Test Method for Measuring
the Energy Consumption of Distribution Transformers under Appendix
A to Subpart K of 10 CFR part 431.
|
| 15 | 97.89 | |
| 30 | 98.23 | |
| 45 | 98.40 | |
| 75 | 98.60 | |
| 112.5 | 98.74 | |
| 150 | 98.83 | |
| 225 | 98.94 | |
| 300 | 99.02 | |
| 500 | 99.14 | |
| 750 | 99.23 | |
| 1000 | 99.28 | |
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