5 Step Auto Transformer Three Phase 7 Amp

  • Neon Indicator
  • IP54 Rated enclosure
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Product Overview

Ventilation Type
Other Products
Product Range
Electronic Speed Control
IP Rating

Used in conjunction with speed controllable fans to provide 5-stepped speed without electronic motor ‘hum and vibration’. Several fans can be connected to one transformer provided their combined load does not exceed the controller rating.

Single phase: 2.0, 3.5, 6.0, 7.5, 9.0 and 14 amp. Three phase: 1.0, 2.0, 4.0, 7.0 and 14 amp.

Rotary switch giving On/Off and five speeds.

Output voltages at 240V/1PH/50Hz 0, 65, 110, 135, 170 and 240 volts.

Output voltages at 415V/3PH/50Hz 0, 65, 110, 175, 285, 415 volts.

Neon indicator. Three phase units complete with terminals for remote on/off switch

Multi-unit Speed Control
When more than one fan is required to be controlled by one Auto Transformer, then the total combined FLC of all the fan units must not exceed 90% of the controller's maximum rating and not more than 2 x the total SC. The TKs must be wired in series. Fans without TKs or in-built S.T.O.P must not be wired in multiples.

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Installation Instructions