6 Parameters
6.5 Parameter description
90
DE1 variable speed starter
09/14 MN040011EN
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6.5.3 Motor protection
6.5.3.1 Overload protection (I
2
t)
In order to protect the motor against thermal overload, a thermal motor
model with an I
2
t characteristic will be computed in the DE1 variable speed
starter based on the value in parameter P-08. If the rated motor current is
lower than the DE1's rated operational current, you will need to enter this
lower value in parameter P-08 or set it using the I-Motor potentiometer in the
DXE-EXT-SET configuration module.
The computed thermal motor image will be automatically saved when the
supply voltage is switched off and used as a basis for additional calculations
when the supply voltage is switched back on. Setting parameter P-33 to 1
will cause a reset to zero.
If the motor current is higher than the value set in P-08 (I
2
t) for an extended
period of time, the DE1 variable speed starter will be automatically switched
off with the following fault message:
•
Fault Code LED: 1 pulse – overload.
•
DX-KEY-LED:
I.t-trP
. During the overload period the decimal points
flash.
→
Motor protection can also be implemented by using an overload
relay, thermistors, etc.
NOTICE
The thermal model will not protect the motor if there is reduced
cooling due to dirt, dust, etc.
→
The fault message must be reset by deactivating the enable
signal (FWD, REV), by pressing the STOP button on the keypad,
or by switching off the mains voltage.
Содержание PowerXL DE1 series
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Страница 36: ...2 Engineering 2 5 Motor Selection 32 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
Страница 68: ...3 Installation 3 6 Block diagrams 64 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
Страница 132: ...7 Modbus RTU 7 4 Operating mode Modbus RTU 128 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
Страница 146: ...8 Technical Data 8 4 Dimensions 142 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
Страница 172: ...10 Fault messages 10 3 Fault list 168 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
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