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1-85 Precise Stop Speed Compensation Delay
Range:
Function:
NOTICE
Not used for selections
[0] Precise ramp
stop, [1] Cnt stop with reset
, and
[2] Cnt
stop w/o reset
in
.
3.2.13 1-9* Motor Temperature
1-90 Motor Thermal Protection
Option:
Function:
Motor thermal protection can be implemented
using a range of techniques:
•
Via a PTC sensor in the motor
windings connected to 1 of the
analog or digital inputs
(
parameter 1-93 Thermistor Resource
).
See
.
•
Via a KTY sensor in the motor
winding connected to an analog
input (
). See
chapter 3.2.15 KTY Sensor Connection
.
•
Via calculation (ETR = Electronic
Thermal Relay) of the thermal load,
based on the actual load and time.
The calculated thermal load is
compared with the rated motor
current I
M,N
and the rated motor
frequency f
M,N
. See
and
.
•
Via a mechanical thermal switch
(Klixon type). See
For the North American market: The ETR
functions provide class 20 motor overload
protection in accordance with NEC.
[0]
No
protection
Continuously overloaded motor when no
warning or trip of the frequency converter is
required.
[1]
Thermistor
warning
Activates a warning when the connected
thermistor or KTY sensor in the motor reacts
in the event of motor overtemperature.
[2]
Thermistor
trip
Stops (trips) the frequency converter when
connected thermistor or KTY sensor in the
motor reacts in the event of motor overtem-
perature.
The thermistor cutout value must be more
than 3 k
Ω
.
1-90 Motor Thermal Protection
Option:
Function:
Integrate a thermistor (PTC sensor) in the
motor for winding protection.
[3]
ETR
warning 1
Calculates the load when set-up 1 is active
and activates a warning on the display when
the motor is overloaded. Program a warning
signal via 1 of the digital outputs.
[4]
ETR trip 1
Calculates the load when set-up 1 is active
and stops (trips) the frequency converter when
the motor is overloaded. Program a warning
signal via 1 of the digital outputs. The signal
appears in the event of a warning and if the
frequency converter trips (thermal warning).
[5]
ETR
warning 2
[6]
ETR trip 2
[7]
ETR
warning 3
[8]
ETR trip 3
[9]
ETR
warning 4
[10] ETR trip 4
[20] ATEX ETR
Activates the thermal monitoring function for
Ex-e motors for ATEX. Enables
parameter 1-94 ATEX ETR cur.lim. speed
reduction
,
parameter 1-98 ATEX ETR interpol.
, and
[21] Advanced
ETR
NOTICE
If
[20] ATEX ETR
is selected, follow the instructions in the
dedicated chapter of the
design guide
and the
instructions provided by the motor manufacturer.
NOTICE
If
[20] ATEX ETR
is selected, set
parameter 4-18 Current
Limit
to 150%.
Parameter Descriptions
VLT
®
AutomationDrive FC 301/302
62
Danfoss A/S © 10/2018 All rights reserved.
MG33MP02
3
3
Содержание VLT AutomationDrive FC 302
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