Calculation rules for nominal operating currents and nominal coil power
Depending on the drive design, SEW-EURODRIVE may reduce the power of the brake coil to achieve lower self-heating. The following table gives an overview of possible designs. The nominal power applicable for the application and the resulting nominal currents can be calculated using the table values for rated operation and the specified adjustment factors.
Brake coil design | Adjustment factor for power and current | DR.., DRN.., DRU.., DR2.. | EDR.., EDRN.. |
|---|---|---|---|
Rated power | Table values for currents and power without adjustment | Drives for ambient temperatures up to a max of +60 °C | Explosion-protected drives according to HazLoc-NA® (line operation) |
1st reduced power | Table values for currents and power × 0.79 | Drives for ambient temperatures up to a max of +80 °C | Explosion-protected drives according to ATEX, IECEx or HazLoc-NA® (inverter operation) |
2nd reduced power | Table values for currents and power × 0.63 | Drives for ambient temperatures up to a max of +100 °C | – |
