Danfoss VLT HVAC Drive FC 102, Руководство по эксплуатации

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All digital inputs can be set to [80] PTC Card 1 . However,
only 1 digital input can have this selection.
NOTICE
Ensure that the digital input set to [80] PTC Card 1 is not
also connected as a thermistor resource (motor overload
protection) in
1-93 Thermistor Resource .
For further description, refer to the relevant frequency
converter programming guide.
4.2.2 Parameter Settings
Ex-e and Ex-n-specific parameters
Function Setting
1-90 Motor Thermal Protection [20] ATEX ETR
1-94 ATEX ETR cur.lim. speed
reduction 20%
1-98 ATEX ETR interpol. points freq.
Motor nameplate
1-99 ATEX ETR interpol points
current
1-23 Motor Frequency
Enter the same value as for
4-19 Max Output Frequency .
4-19 Max Output Frequency Motor nameplate, possibly
reduced for long motor
cables, sine-wave filter, or
reduced supply voltage.
4-18 Current Limit Forced to 150% by 1-90 [20]
5-15 Terminal 33 Digital Input [80] PTC Card 1
Parameter 5-19 Terminal 37 Safe
Stop [4] PTC 1 Alarm
14-01 Switching Frequency Check that the default value
fulfils the requirement from
the motor nameplate. If not,
use a sine-wave filter.
14-26 Trip Delay at Inverter Fault 0
Table 4.4 Parameter Settings
4.3 Parameter Set-up for Ex-e and Ex-n
Motors
4.3.1 Maximum Current
To activate the ATEX ETR monitor function, set 1-90 Motor
Thermal Protection to [20] ATEX ETR . This enables 1-94 ATEX
ETR cur.lim. speed reduction , 1-98 ATEX ETR interpol. points
freq. , and 1-99 ATEX ETR interpol points current , and limits
4-18 Current Limit to 150%.
4.3.2 Maximum Current Limit
The operation above the thermal characteristic curve is
permitted for a limited period of 60 s.
The actual thermal overload is calculated based on the ETR
function selected in
1-90 Motor Thermal Protection and is
displayed in 16-18 Motor Thermal .
Running above the characteristic curve for more than 50 s
triggers
Warning 163 ATEX ETR cur.lim. warning . Configure
the reaction for operating in Ex-e and Ex-n current limits in
1-94 ATEX ETR cur.lim. speed reduction .
•
0%: The frequency converter does not change
anything besides issuing
Warning 163 ATEX ETR
cur.lim.warning .
•
>0%: The frequency converter issues Warning 163
ATEX ETR cur.lim.warning and reduces motor
speed following ramp 2 (parameter group 3–5*
Ramp 2 ).
Example
:
Actual reference = 200 RPM
1-94 ATEX ETR cur.lim. speed reduction = 20%
Resulting reference = 160 RPM
Operating above the characteristic curve for more than
60 s within a period of 600 s triggers
Alarm 164 ATEX ETR
cur.lim. , and the frequency converter trips.
Operation above 150% nominal motor current trips the
frequency converter after 1 s with
Alarm 164 ATEX ETR
cur.lim.
Operation above 180% nominal motor current immediately
trips the frequency converter with
Alarm 164 ATEX ETR
cur.lim.
After first start-up (power-up), the overload counter starts
at a value that prevents resetting the thermal load value
by power cycling. After start-up, the overload warning is
suppressed until the motor current exceeds the rated
current limit for the first time.
4.3.3 Minimum Motor Frequency
The operation below the minimum frequency in 1-98 ATEX
ETR interpol. points freq. is allowed for a limited time only.
Running below the minimum frequency for more than 50 s
triggers
Warning 165 ATEX ETR freq.lim.warning .
Commissioning
VLT
®
PTC Thermistor Card MCB 112
14 Danfoss A/S © 01/2015 All rights reserved. MG33V302
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