GE AF-650 GP Programming Manual page 93

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
enclosure 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 3.42 RFI Filter
SP-51 DC Link Compensation
Option: Function:
The rectified AC-DC voltage in 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 in the DC link. In general, DC-link compen-
sation is recommended for most applications, but pay
attention 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 Disables DC-link compensation. This disables compen-
*
sation for ripple in the DC bus and may be set when
harmonic filters are used with the drive.
[1] On Enables DC-link compensation. This function
compensates for lower or higher DC bus voltages to
recreate a more perfect sine-wave. May overcom-
pensate when harmonic filters are used.
92
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 always runs at 100% speed.
[4] Auto
(Low
temp
env.)
SP-53 Fan Monitor
Option:
[0] Disabled
[1] Warning
*
[2] Trip
SP-54 AHF Cap Reconnect Delay
Range:
25 s [1 - 120
*
s]
02/2016 All rights reserved.
Function:
Select [0] Auto to run fan only when internal
temperature in frequency converter is in range
35 °C to approximately 55 °C.
Fan runs at low speed below 35 °C, and at full
speed at approximately 55 °C.
The fan always runs at 50% speed or above. The
fan runs at 50% speed at 35 °C, and at full
speed at approximately 55 °C.
The fan always runs at 75% speed or above. The
fan runs at 75% speed at 35 °C, and at full
speed at approximately 55 °C.
This option is the same as [0] Auto, but with
special considerations around and below 0 °C. In
option [0] Auto there is a risk that the fan starts
running around 0 °C as the frequency converter
detects a sensor fault and thus protect the
frequency converter while reporting warning 66,
Heat sink Temperature Low. Option [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,
Heat sink Temperature Low.
Function:
Select the frequency converter action if a fan
fault is detected.
Function:
Guarantees a minimum off-time for the
capacitors. The timer starts once the AHF
capacitor disconnects and needs to expire
before the output is allowed to be on again. It
only turns on again if the frequency converter
power is 20–30%.
DET-618D