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010.1220.0719 01.21
4. ELECTRICAL INSTALLATION
4.1 General
All wiring must be in compliance with the local codes or in
their absence, with the National Electric Code, NFPA70.
All wiring should meet these requirements: installed in rigid
metal conduit, intermediate metal conduit, rigid non-metallic
conduit, electrical metallic tubing, or be otherwise suitably
protected from physical damage. All BEFx units are equipped
with an EC-motor and operate at different voltages so it’s
important to pay attention to the wiring details.
Note: If any of the original wire supplied with the system
must be replaced, use similar wire of the same temperature
rating. Otherwise, insulation may melt or degrade, exposing
bare wire.
WARNING
This product is equipped with an electronically
commutated (EC-motor) and can not be
connected directly to ac mains. Motor must
be connected to approved motor controller to
ensure proper function. Failure to use approved
motor controller may result in damage to the motor.
AVERTISSEMENT
Ce produit est équipé d’un commutateur électronique
(moteur EC) et ne peut pas être connecté directement au
secteur. Le moteur doit être connecté au contrôleur de
moteur approuvé pour assurer un fonctionnement correct.
Ne pas utiliser le contrôleur de moteur approuvé peut
endommager le moteur.
!
WARNING
All BEF models must be operated with the
approved factory-programmed motor drive.
DO NOT CONNECT DIRECTLY TO LINE
VOLTAGE!
AVERTISSEMENT
Tous les modèles BEF doivent être utilisés avec
l’entraînement motorisé approuvé en usine.
NE PAS CONNECTER DIRECTEMENT À LA TENSION DE
LIGNE!
!
DANGER
Turn off electrical power before servicing.
Contact with live electric components can
cause shock or death.
DANGER
Éteignez l’alimentation électrique avant de procéder à
l’entretien. Le contact avec des composants électriques
sous tension peut provoquer un choc ou la mort.
ABOUT SHAFT GROUNDING
Bearing currents are very common problem of Variable
Frequency Drives (VFD/Motor Controller) and electronic
commutated motors. The electric-discharge machining
(EDM) bearing currents are generated in motors because
of unbalanced modulated voltage from drive to the motor.
Because of stray capacitances in motor, bearing currents
are generated in rotor and there is usually no other way to
discharge except through bearings. This drastically lowers
the life time of the bearings.
The BEFx’s EC-motor integrates an insulated rotor system,
which means that electrical insulation is inserted between
rotor and motor shaft. This system provide up to 80%
lower shaft voltages and very low bearing current values
which eliminates bearing damage.
DANGER
The motor speed drive is suitable for use in a
circuit capable of receiving not more than 100
KA RMS symmetrical Amperes at the maximum
reated voltage.
DANGER
Le variateur de vitesse peut être utilisé dans un circuit
capable de recevoir des ampères symétriques de plus de
100 KA à la tension maximale.
4.2 Motor Controller
All ENERVEX BEFx fans come with, and must use, a factory
programmed EDrive motor controller with an enclosure rated
to NEMA 4X/IP66 for indoor and outdoor installation.
The EDrive E3 motor controller must be mounted within 300
feet of the BEFx Fan. This distance can be increased up to
600 feet with the addition of a line filter (Contact ENERVEX
for details).
A motor disconnect switch must be installed between the
motor controller and the BEFx Fan, either within sight of the
BEFx Fan, or within 50 feet of the BEFx Fan.
Do not activate the motor service disconnect switch
while the BEFx motor is running - damage could occur to
the motor controller.
For more information about the EDrive E3, please refer to
the Installation & Operating Manual.
Summary of Contents for BEF 225x
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