480 to 400 v transformer
[DOC File]library.e.abb.com
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LV: 240/120, 480/240, 277 V. The specific requirements are stated in detail on the Transformer Data Sheet. 2.0 CODES AND STANDARDS. All codes and standards referenced in this specification shall be those in effect at the time of Purchase Order award.
[DOC File]www.bwass.org
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A single-phase 10-kVA 480/120-V transformer is to be used as an autotransformer tying a 600-V distribution line to a 480-V load. When it is tested as a conventional transformer, the following values are measured on the primary (480-V) side of the transformer: Open-circuit test Short-circuit test
[DOC File]Chapter 31
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31-23. A step-up transformer has 400 secondary turns and only 100 primary turns. A 120-V alternating voltage is connected to the primary coil. What is the output voltage? Es = 480 V. 31-24. A step-down transformer is used to drop an alternating voltage from 10,000 to 500 V. What must be the ratio of secondary turns to primary turns?
[DOC File]PART 1 – GENERAL
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If transformer is to be used for non-linear load applications, the transformer shall be derated as per ANSI/IEEE C57.110. Voltage and kVA Requirements: Primary Voltage: [208][216][240][400][480][600][other] Volts
[DOC File]BASIC NEC CODE RULES AND DESIGN PRACTICE
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500 2-250 MCM Parallel 400. 600 3-3/0 Parallel 480. 700 3-4/0 Parallel 560. 800 3-300 MCM Parallel 640 ... All the buildings served by a common transformer must be reevaluate to insure that the. existing short circuit protection is adequate for the larger transformer required when additional buildings are added to the compound service system ...
[DOC File]WordPress.com
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Nowadays that thought has changed and we are using 400 V instead of 440 V, or 230 V instead of 220 V. ... 240 volt output— can have the output connected to a 240 volt source and thereby become the primary or input to the transformer, then the original 480 volt primary winding will become the output or 480 …
[DOC File]Appendix A
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IEEE C57.12.23-1992 (Reaff 1999), Standard for Transformers—Underground-Type, Self-Cooled, Single-Phase Distribution Transformers With Separable, Insulated, High-Voltage Connectors; High Voltage (24 940 GrdY/14 400 V and Below) and Low Voltage (240/120 V, 167 kVA and Smaller) (ANSI)
[DOCX File]ATE1120: Electrical Fundamental-II
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The most common type of control transformer has two primary coils and one secondary coil, as shown in Figure 1.9. Figure 1.9: A Typical Control Transformer Configuration. In most cases, the control transformer is used to reduce the main or line voltage of 240 VAC or 480 VAC to a control voltage of 120 VAC. Notice that the primary windings are ...
[DOC File]SCOPE OF SUPPLY LAND BASED STATION PLANT 1
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Site auxiliary transformer, 400 KVA, 13.8 kV / 480 V, Phase 3, 60hz, “CELDUC” Distribution switchboard, 480 V. Sub Distribution board, 240 V for lighting and small power. Remote control system, 1 set Gas Turbine – Generator control panel, 1 set Indicating and metering for main transformer, 1 set Fire alarm and protection system.
[DOC File]IEEE Standards - draft standard template
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The conversion to 480 V could be accomplished by the use of a standard 480 to 120 V transformer. The 480 V winding was connected in series with the 120 V winding, thus obtaining 600 V. The neutral was common to both systems. After the source was converted to 480 V, the same buck-boost transformer could be turned around and used to convert 480 V ...
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