GE AF-650 GP Programming Manual page 83

Parameter Descriptions
3.9.5 SP-5# Environment
Parameters to enable/disable the optional factory installed
A1/B1 RFI Filter, and Fan Monitor and to configure an
output filter if installed.
3 3
SP-50 RFI Filter
Option: Function:
[0] Off Select [0] Off if the frequency converter is fed by an
isolated mains source (IT mains).
If a filter is used, select [0] Off during charging to
prevent a high leakage current making the RCD
switch.
In this mode, the internal RFI filter capacitors between
chassis and the mains RFI filter circuit are cut-out to
reduce the ground capacity currents.
[1] On Select [1] On to ensure that the frequency converter
*
complies with EMC standards.
Illustration 3.40 RFI Filter
SP-51 DC Link Compensation
Option: Function:
The rectified AC-DC voltage at the frequency
converter's DC link is associated with voltage ripples.
These ripples can increase in magnitude with
increased load. These ripples are undesirable because
they can generate current and torque ripples. A
compensation method is used to reduce these voltage
ripples at DC link. In general, DC link compensation is
recommended for most applications, but care must be
taken when operating in field weakening as it can
generate speed oscillations at the motor shaft. In field
weakening, it is recommended to turn DC link
compensation off.
[0] Off Select [0] Off to disable DC Link Compensation. this
*
disables compensation for ripple in the DC bus and
may be set when harmonic filters are used with the
drive.
[1] On Select [1] On to enable DC Link Compensation. This
function compensates for lower or higher DC bus
voltages to recreate a more perfect sine wave. May
overcompensate when harmonic filters are used.
82
AF-650 GP Programming Guide
SP-52 Fan Operation
Select minimum speed of the main fan.
Option:
[0] Auto
*
[1] On 50%
[2] On 75%
[3] On 100% The fan will run at 100% speed always.
[4] Auto
(Low
temp
env.)
SP-53 Fan Monitor
Option:
[0] Disabled
[1] Warning
*
[2] Trip
SP-55 Output Filter
Option:
[0] No
Filter
*
[1] Sine-
Wave
Filter
DET-618C
Function:
Select [0] Auto to run fan only when internal
temperature in frequency converter is in range
35 °C to approx. 55 °C.
Fan will run at low speed below 35 °C, and at
full speed at approx. 55 °C.
The fan will always run at 50% speed or above.
The fan will run at 50% speed at 35 °C, and at
full speed at approx. 55 °C.
The fan will always run at 75% speed or above.
The fan will run at 75% speed at 35 °C, and at
full speed at approx. 55 °C.
This selection is the same as [0] Auto but with
special considerations around and below 0°C. In
selection [0] Auto there is a risk that the fan will
start running around 0°C as the frequency
converter will fear a sensor fault and thus
protect the frequency converter while reporting
warning 66 "Heatsink Temperature Low".
Selection [4] Auto (Low temp env.) can be used in
very cold environments and prevent the
negative effects of this further cooling and avoid
warning 66.
Function:
Select which reaction the frequency converter
should take in case a fan fault is detected.
Function:
NOTE
This parameter cannot be adjusted while
motor is running.
Select if a Sine-Wave output filter connected.
This is the default setting and should be used with
dU/dt filters or high-frequency common-mode (HF-
CM) filters.
This setting is only for backwards compatibility. It
enables operation with FLUX control principle
when the parameters SP-56 Capacitance Output
Filter and SP-57 Inductance Output Filter are
programmed with the output filter capacitance
and inductance. It DOES NOT limit the range of
the switching frequency.