Elta Aco Auto Changeover Panel Three Phase Ac

The elta 149-aco3 b is an auto changeover panel for three phase ac twin fan units. It runs the duty fan and automatically changes over to the standby fan if the duty fan's thermal overload trips, or on loss of airflow where the twin fan unit has airflow switches.This is the automatic duty share model: an internal timer gives each fan a 12 hour duty cycle so both motors wear evenly. It runs on 400v three phase 50hz plus neutral, uses industrial contactors with thermal overloads preset to the fans, and has a power lamp, fan fail lamp and rocker switch on the fascia in a 315 x 235 x 130 mm surface mounted enclosure. Run and standby auto changeover panel three phase ac what it is best used fortwin fan extract or supply where ventilation must keep running if one motor fails: toilet cores in offices and schools, car park and plant room extract, kitchens and residential common areas. It suits direct on line three phase twin fan units, with or without airflow switches.It is not suitable for use with inverters, and it is for three phase ac fans ec twin fans need an ec changeover panel. A volt free fan fail output is on the 149-aco3 bdv version, not this model.Why choose this over alternativesagainst wiring two fans to manual switching, the panel changes over on its own the moment a thermal overload trips or airflow is lost, and the 12 hour auto duty share keeps run hours equal so the standby fan is not left seized. Elta's datasheets list the aco panels against their twin fan range...

The elta 149-aco3 b is an auto changeover panel for three phase ac twin fan units. It runs the duty fan and automatically changes over