page 8 M-7A87-F 090710
Sizing Guide
TheDFEis designedforgeneral purposeapplicationsandwherea traditionalStar/Deltais
currentlyused, or would beconsidered to be appropriate. Generallythe motor will startoff
load, and the time to accelerate to full speed will be in the region of a few seconds.
Thestandard DFErange is suitablefor the majorityof cases,andconforms toTrip Class5,
which means it is capable of withstanding 3 times Full Load Current for 5 second starts.
Howeverthere are instances wherea different start is requiredand to satisfy thissituation
theDFEhas fourfurtherratings, Class10B,Class 10,Class20 andClass30.These ratings
correspond to IEC thermal / electronic overload trip classes, and the DFE must be used
with an over current protection device that has a rating corresponding to the Trip Class
selected.
When using the following tables to select the most appropriate model of DFE please note
· The DFE is not suitable for very high inertia loads such as centrifuges or
loaded crushers with starts > 30 seconds (Fairford has other ranges of Soft
Starter for these applications)
· Do not use the Class 5 rating when there is possibility of the motor starting
with a significant load.
· 2-pole motors may take longer to start, use a minimum of Trip Class 10B.
Attention!
Within the scope of the EU Directives, the DFE soft starters and their accessories may be
commissioned only provided it is established that the machine fulfils the protective
requirements of Machine Directive 89/392/EWG.
Achtung!
Im Geltungsbereich der EG-Richtlinien dürfen die Softstarter der Reihe DFE und deren
ZubehörnurdanninBetriebgenommenwerden,wennfestgestelltwird, dassdieMaschine
dieSchutzanforderungender Maschinenrichtlinie89/392/EWG erfüllt.
¡Atención!
Enel campo deaplicación de la normativaCE, los arrancadoressuavesde la serieDFE y
suscorrespondientesaccesoriossólo deberánponerseenmarcha cuandoseasegureque
lamáquina cumple conlas exigencias de seguridadde la normativa demáquinas 89/392/
CE.
Attention !
Enapplication des directiveseuropéennes, les démarreursprogressifsde la gammeDFE
et leurs accessoires ne doivent être mis en service que s’il a été vérifié que la machine
répondbien aux exigences dela directive machines 89/392/EWG.
Attenzione!
Nel campo di validità delle direttive CEE i softstarter della serie DFE e i loro accessori
possono essere messi in esercizio solamente se è verificato che la macchina soddisfai
requisitidi sicurezza delle direttivemacchine 89/392/CEE.
