Delta Secondary - BIG ASS FANS Basic^ Installation Manual

Additional Input Power Considerations
Controllers damaged by any of the conditions mentioned below may not be covered by Big Ass Fans warranty policy.
This section points out additional requirements that may be needed for the fan system to operate properly. To encourage a trouble-free
fan system, additional input considerations should be addressed prior to installation.
Input voltage irregularities
CAUTION: One device is required for each fan controller.
ATTENTION : Un dispositif est requis pour chaque régulateur de ventilateur
The fan controllers are suitable for direct connection to input power within the rated voltage of the fan controller, but are sensitive to
rapid changes in supply voltage. Below are certain input power conditions that may cause nuisance tripping, such as Overvoltage
and Undervoltage faults. If any of the conditions exist as described below, you can install one of the devices listed under the heading
"Corrective Action" on the input side of the fan controller.
Input power condition
Low line impedance (less than 1% reactance)
Line has power factor correction capacitor
Line has frequent power interruptions (voltage sags or swells)
Phase-to-ground voltage exceeds 125% of normal line to line voltage
Ungrounded distribution system
More than one controller per branch circuit

Delta secondary

CAUTION: Care must be taken when connecting to a three-phase 240/120V secondary as shown below. All fan controller
models rely on internal references made between each incoming phase and ground. To prevent nuisance tripping such as
Overvoltage and Undervoltage faults, 200–250V, three phase fan controllers should be connected so that the High leg, or
"phase B," terminates on "L2" of the fan controller's input power terminals.
CAUTION: Avoid installations utilizing supply transformers with a 480V delta secondary (ungrounded, corner grounded,
open). Proper fan operation cannot be guaranteed due to a lack of proper phase-to-ground voltage references.
ATTENTION : Il faut faire attention lors de la connexion à un secondaire triphasé 240/120V, comme illustré. Tous les
modèles de contrôleur de ventilation dépendent des références internes effectuées entre chaque phase d'arrivée et
chaque base. Pour éviter les déclenchements intempestifs tels que les défauts de surtension et de sous-tension, les
régulateurs triphasés de 200V doivent être raccordés de sorte que la tension trop élevée ou la « phase B », termine le
« L2 » des bornes d'entrée d'alimentation du régulateur de ventilation.
ATTENTION : Éviter les installations utilisant des transformateurs d'alimentation avec un secondaire delta de 480V (non
mis à terre, mis à terre, ouvert). Le bon fonctionnement
There are many different arrangements available for industrial and commercial power distribution in North America. The most common
are the following:
575V/330V Three-Phase (Wye Secondary)
480V/277V Three-Phase (Wye Secondary)
208V/120V Three-Phase (Wye Secondary)
240V/120V Three-Phase (Delta Secondary)
per NEC 110.15.
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™
12'–24' BASIC6
Corrective action
Install line reactor. Consult your Big Ass Fans representative
for recommended part number.
Install Delta/Wye isolation transformer with grounded
secondary (1:1 turns ratio).
Install line reactor.
©2012 DELTA T CORP. DBA BIG ASS FAN
"B" Phase
"C" Phase
Neutral / Ground
"A" Phase
ALL RIGHTS RESERVED
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