Lenze 8200 series User Manual

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Commissioning

5-12 UOMu_^MVMO

3.Set the Vmin boost

(C016).

Load-dependentboost 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.

Adjustment

In general, an adjustment is not necessary. An optimisation can be advantageous:

For drives with very high starting torques:

A Operate the motor under load.

B Select the frequency setpoint.

C Increase V

min

until the required motor current (torque) occurs.

Too high settings of V

min

can lead to a positive-feedback effect which activates the

TRIP ”Overcurrent” (OCx).

For drives with square load torques (fans, pumps):

A Operate the motor under load.

B Select the frequency setpoint.

C Adapt V

min

until the motor is running steadily and smoothly over the whole fre-

quency range.

Too high settings of V

min

can activate the TRIP ”Overcurrent” (OCx) and lead to an

extensive motor temperature.

For drives with special motors:

A Operate the motor under load.

B Select the frequency setpoint.

C Increase V

min

until the required motor current (torque) occurs.

Too high settings of V

min

can lead to a positive-feedback effect which activates the

TRIP ”Overcurrent” (OCx).

D Check the current consumption during idle-running when no load is applied

4.Set slip compensation

(

)

Rough setting by means of the motor data:

(C021).

ë =

êëóå

− å

êëóå

⋅ NMMB

êëóå

Çê

⋅ SM

s Slip constant (C021)

rsyn

synchronous motor speed [min

-1

]

rated speed to motor nameplate [min

-1

]

rated frequency to motor nameplate [Hz]

p Number of pole pairs

Precise setting:

Change C021 under constant load until the speed is near the synchronous speed.

If C021 is set to too high values, the drive may become instable (overcompensation).

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Questions and Answers:

C
callahananneAug 22, 2025
Why does my Lenze 8200 Inverter display 'OC1'?
- E
  elliottelizabethAug 22, 2025
  The Lenze Inverter displays 'OC1' due to a short circuit. Find the cause of the short circuit and check the cable. It can also be caused by excessive capacitive charging current of the motor cable. Use a motor cable which is shorter or of lower capacitance.

Lenze 8200 series Specifications

General

Category	Inverter
Output voltage range	0 V to input voltage
Control modes	vector control
Communication interfaces	RS485, CANopen, Profibus, Ethernet
Protection features	Overcurrent, overvoltage, undervoltage, short circuit, overtemperature
Relative humidity	95 % (non-condensing)
Protection class	IP20