3 Phase Voltage Levels
3 Phase Voltage Levels
(OP)
Here what I have confusion:
What 3 phase actual voltage should be? 400 or 415 or 480 or 440, 380 Volts at 50 Hz. for calculations both design and running conditions.
What makes these levels vary?
What 3 phase actual voltage should be? 400 or 415 or 480 or 440, 380 Volts at 50 Hz. for calculations both design and running conditions.
What makes these levels vary?






RE: 3 Phase Voltage Levels
Three-phase 50 Hz
230 V / 400 V
400 V / 690 V
1000 V
Suppliers using 220 V / 380 V or 240 V / 415 V systems were expected by the standard to migrate to the recommended value of 230 V / 400 V by the year 2003. This migration has already been largely completed, as least within the European Union.
Three-phase 60 Hz
120 V / 208 V
240 V
277 V / 480 V
480 V
347 V / 600 V
600 V
One-phase, three-wire 60 Hz
120 V / 240 V
RE: 3 Phase Voltage Levels
Although there are "standard' voltages, which more common in a country or region, it is not illegal to have different voltages but many non-technical reasons may not make them a wise choice.
What makes it vary? - Long history, development of separate systems before they were interconnected. Evolution of standards and harmonization, which is still an on going process.
Rafiq Bulsara
http://www.srengineersct.com
RE: 3 Phase Voltage Levels
Bill
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"Why not the best?"
Jimmy Carter