Sew Eurodrive MOVITRAC LTP-B Manuel Produit page 54

Étude et configuration des variateurs
5
Information regarding UL
5.2 Information regarding UL
5.2.1 Ambient Temperature
5.2.2 Thermal motor protection
Parameter
Functional principle
54
Manuel produit – MOVITRAC
REMARQUE
En raison des exigences UL, le chapitre suivant est toujours en anglais, indépendam-
ment de la langue de la présente documentation.
The units in IP20 are suitable for an ambient temperature of 50 °C, max. 60 °C.
The units in IP55/IP66 are suitable for an ambient temperature of 40 °C, max 50 °C.
Thermal motor overload protection shall be provided by one of the following means:
• NEC compliant installation of a motor temperature sensor, see also section "Motor
temperature protection (TF/TH)" in the chapter "Electrical Installation" of the opera-
ting instructions.
• Using internal thermal motor overload protection according to NEC (National Elec-
trical Code, US). Thermal motor overload protection can be activated via parame-
ter P4-17.
• Implementing external measures to ensure thermal motor overload protection
according to NEC (National Electrical Code).
The following parameter must be set to enable the internal thermal motor protection
according to NEC:
• P4-17 Thermal motor protection according to NEC
– 0: Disabled
– 1: Enabled
The motor current is accumulated in an internal memory over the course of time. The
inverter goes to fault state as soon as the thermal limit is exceeded (I.t-trP).
Once the output current of the inverter is less than the set rated motor current, the in-
ternal memory is decremented depending on the output current.
• When P4-17 is disabled, thermal memory retention is reset upon shutdown or po-
wer loss.
• When P4-17 is enabled, thermal memory retention is maintained upon shutdown
or power loss.
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LTP-B