Vent Axia Five Step Auto Transformer 1 Ph. 3.5Amp 10314103

The 5 Step Auto Transformer Single Phase 3.5 Amp is a robust and reliable speed controller designed for use with speed-controllable fans in commercial ventilation systems. With its rotary switch offering five stepped speed settings and On/​Off control, this unit delivers smooth and precise fan speed management without the electronic hum or vibration typically associated with electronic controllers.

Enclosed in an IP54-rated casing for protection against dust and moisture, this transformer includes a neon power indicator and is suitable for wall-mounted applications in demanding environments. The unit provides output voltages of 0, 65, 110, 135, 170, and 240V on a 240V/​1PH/​50Hz supply, supporting consistent and flexible control.

Multiple fans can be connected to a single transformer, provided their total load remains within 90% of the controller’s rated capacity. For safe operation, fans must include thermal contacts (TK), which should be wired in series.

This controller is part of a comprehensive range of single-phase auto transformers (2.0A to 14.0A) designed to provide dependable, low-noise fan speed control for commercial applications.