B&R 8I84T200037.01P-1, User Manual

Page: 145 / 405

Programming guidelines
ACOPOSinverter P84 User's Manual 2.10 145
Code Name/Description Setting range Factory settings
SFr [Switching freq.] Depending on the size Depending on the size
Switching frequency setting.
Setting range:
Can vary between 1 and 16 kHz, but the minimum and maximum values and the default value, depending the inverter type, the
rated current (power and voltage) and the configuration of the parameter [Sine-wave filter] (OFI) and [Motor surge limit] (SVL) ( see "Drive (nrd
- SOP)" on page 161 ) are restricted.
If the value is lower than 2 kHz, then [current limit] (CLI) and [2nd current limit] (CL2) are limited to 1.36 In.
Setting during operation:
•
If the initial value is under 2 kHz, it can not be increased over 1.9 kHz during operation.
•
If the start value is greater than or equal to 2 kHz, during operation a minimum value of 2 kHz should be maintained.
Adaptation with stopped inverter: No restrictions.
Note:
In the event of excessive temperature rise, the inverter will automatically reduce the switching frequency and reset it once the
temperature returns to normal.
Note:
If [Motor control type] (Ctt) , see "Drive parameters (Ctt)" on page 153 , is set to [FVC] (FUC) , it is not recommended to set the
switching frequency to a value below 2 kHz (to avoid unstable speeds).
Caution!
On inverters of the models 8I84T400075.01P-1 to 8I84T400400.01P-1, if the RFI filters are disconnected (operation on an IT system),
the inverter's switching frequency is not permitted to exceed 4 kHz.
Failure to follow this instruction can result in equipment damage.
CLI
[CURRENT LIMIT.]
0 to 1.65 In
1)
1.5 In
1)
Used to limit the motor current.
The adjustment range is limited to 1.36 In if [Switch frequency] (SFr) , see "Setting parameters (SFr - CL2)" on page 144 , is under 2 kHz.
Note:
If the setting is less than 0.25 In, the inverter can remain in error mode [output phase loss] (OPF) , if this has been enabled, see
"THERM. MOTOR PROTECTION (tHt) and LOSS OF MOTOR PHASE (OPL)" on page 292 ). If it is below the no-load current of
the motor, the limitation has no effect.
Caution!
Make sure that the motor is designed to this current, since these are susceptible to a demagnetization.
Failure to follow this instruction can result in equipment damage.
CL2 [2nd current limit] 0 to 1.65 In
1)
1.5 In
1)
see "CURRENT LIMIT (CLI-)" on page 259
The adjustment range is limited to 1.36 In if [Switch frequency] (SFr) , see "Setting parameters (SFr - CL2)" on page 144 , is under 2 kHz.
Note:
If the setting is less than 0.25 In, the inverter can remain in error mode [output phase loss] (OPF) , if this has been enabled, see
"THERM. MOTOR PROTECTION (tHt) and LOSS OF MOTOR PHASE (OPL)" on page 292 ). If it is below the no-load current of
the motor, the limitation has no effect.
Caution!
Make sure that the motor is designed to this current, since these are susceptible to a demagnetization.
Failure to follow this instruction can result in equipment damage.
1) In is the same as the rated current specified in the installation instructions or on the nameplate of the inverter.
These parameters only appear if the corresponding function has been selected in another menu. When the parameters can also be
accessed and adjusted from within the configuration menu for the corresponding function, their description is detailed in these menus, on
the pages indicated, to aid programming.
Parameter that can be modified during operation or when stopped.