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Protection class accuracy requirements [5]. In the table, Up and Upn are the primary voltage and nominal (rated) primary voltage, respectively; εu and φe are the voltage (ratio) and phase errors, respectively.
| Accuracy Class | Up/Upn | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 2 | 5 | X (1) | |||||||
| εu % ± |
φe Minutes ± |
φe Centiradians ± |
εu % ± |
φe Minutes ± |
φe Centiradians ± |
εu % ± |
φe Minutes ± |
φe Centiradians ± |
|
| 3P | 6 | 240 | 7 | 3 | 120 | 3.5 | 3 | 120 | 3.5 |
| 6P | 12 | 480 | 14 | 6 | 240 | 7 | 6 | 240 | 7 |
(1) x is the rated voltage factor multiplied by 100.
