Lenze 8200 Frequency inverters - Manual (Page 161)

Configuration
8200SHB0199 7-24
7.5.6.2 V
min
setting
Code Name Possible settings IMPORTANT
Lenze Choice Info
C016 V
min
setting C016
820X * 0.00 {0.05 %} 40.00 *depends on the unit
821X/822X/
824X
0.00 0.00 {0.02 %} 40.00
Function when
C014 = -0-, -1- Load-dependent boost of the motor voltage in the field frequency range below the V/f-rated
frequency. C016 acts as gain factor of the auto-boost function (only with 820xE).
Adjustment As known from experience, an adjustment is not required when having the conditions mentioned
above.
An optimisation can be advantageous
for drives with very high starting torques:
1.Operate motor under load.
2.Select the frequency setpoint.
3.Increase V
min
until the required motor current (torque) occurs.
- If the setting of V
min
is too high, a positive-feedback effect can occur and activate the TRIP
”overcurrent” (OCx).
for drives with square load torques (fans, pumps):
1.Operate motor under load.
2.Select the frequency setpoint.
3.Adapt V
min
until the drive runs steadily and smoothly over the whole frequency range.
- If the setting of V
min
is too high, the TRIP ”overcurrent” (OCx) can be activated and lead to an
excessive motor temperature.
for drives with special motors:
1.Operate motor under load.
2.Select the frequency setpoint.
3.Increase V
min
until the required motor current (torque) occurs.
- If the setting of V
min
is too high, a positive-feedback effect can occur and activate the TRIP
”overcurrent” (OCx).
4.Check the current consumption during idle running when no load is applied.
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