Mains voltage, adaptation C0173

Question:

Which influence does the adaptation have on the mains voltage threshold via code digit C0173?

Answer:

1. Under C0173 the operate values are adjusted to the mains conditions for monitoring of the intermediate circuit voltage (overvoltage and undervoltage).
2. Furthermore, the output currents (nominal and maximum values, current derating in case of EVS9326 ... EVS9332) differ, if operation is effected with 400 V or 480 V respectively. The drive controller takes the permissible output currents from the setting under C0173.
This results in following relations:

• If in case of 400 V a mains voltage under C0173 = 3 or 4 (480 V) is selected (e.g. in order not to use a brake unit in case of a short-term generator energy), the operating threshold increases for undervoltage and overvoltage, at the same time the output power is reduced (permanent and maximum power) due to the lower output currents.
• If in case of 480 V mains voltage C0173 = 1 (Lenze factory default setting) is not adjusted, a higher output power is supplied (because of higher output voltage) by the drive controller due to the not adjusted output currents. The drive controller's life, however, lowers due to the thermal overload.
• If the C0173 mains voltage threshold is not adjusted, it will become more probable that the drive controller sets pulse inhibits with overvoltage or undervoltage respectively, so that the drive enters a state without torque.
• The current derating for EVS9326...EVS9332 is applied in case of settings C0173 = 2, 3 and 4.

URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/20011537/1/