2 - Big Ass Fans

12’–24’ BASIC6 Additional Input Power Considerations37Controllers 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-freefan system, additional input considerations should be addressed prior to installation.Input voltage irregularitiesCAUTION: One device is required for each fan controller.ATTENTION : Un dispositif est requis pour chaque régulateur de ventilateurThe fan controllers are suitable for direct connection to input power within the rated voltage of the fan controller, but are sensitive torapid changes in supply voltage. Below are certain input power conditions that may cause nuisance tripping, such as Overvoltageand 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 conditionCorrective actionLow line impedance (less than 1% reactance)Line has power factor correction capacitorInstall line reactor. Consult your Big Ass Fans representativeLine has frequent power interruptions (voltage sags or swells) for recommended part number.Phase-to-ground voltage exceeds 125% of normal line to line voltage Install Delta/Wye isolation transformer with groundedUngrounded distribution systemsecondary (1:1 turns ratio).Install line reactor.More than one controller per branch circuitDelta secondaryCAUTION: Care must be taken when connecting to a three-phase 240/120V secondary as shown below. All fan controllermodels rely on internal references made between each incoming phase and ground. To prevent nuisance tripping such asOvervoltage 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 lesmodèles de contrôleur de ventilation dépendent des références internes effectuées entre chaque phase d’arrivée etchaque base. Pour éviter les déclenchements intempestifs tels que les défauts de surtension et de sous-tension, lesrégulateurs 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 (nonmis à terre, mis à terre, ouvert). Le bon fonctionnementThere are many different arrangements available for industrial and commercial power distribution in North America. The most commonare 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.“B” Phase240V208V“C” Phase120V 120V240V240VNeutral / Ground“A” PhaseWWW.BIGASSFANS.COM ©2012 DELTA T CORP. DBA BIG ASS FAN ALL RIGHTS RESERVED