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ATC • Auto transformer fan speed controller

  • Auto transformer fan speed controller
  • 230 Volts or 400 Volts
  • Max. 16 Amps

Auto transformer fan speed controllers

Application

For use with single and three phase voltage controllable fans. Auto transformer speed controllers regulate the voltage output whilst maintaining a true sine wave. The great advantage of this type of control is the low motor noise (humming) and almost no EMC emission problems.

Composition

  • Single phase models (Except ATC1-16) housed in grey plastic enclosures
  • Three phase models & ATC1-16 housed in ventilated grey metal enclosures
  • Speed settings via rotary switch
  • Single phase models suitable for 2 or 3 wire
  • Control (except ATC1-1.5 - 2 wire control only)

Technical Data

Single Phase Auto Transformer Controller (ATC Range)
ModelElectrical SupplyMax RatingDimensions (H x W x D)
ATC1-1.5230v 1ph 50hz1.5 Amps190mm x 125mm x 90mm
ATC1-4230v 1ph 50hz4 Amps315mm x 235mm x 130mm
ATC1-8230v 1ph 50hz8 Amps315mm x 235mm x 130mm
ATC1-10230v 1ph 50hz10 Amps315mm x 235mm x 130mm
ATC1-12230v 1ph 50hz12 Amps315mm x 235mm x 130mm
ATC1-16230v 1ph 50hz16 Amps400mm x 300mm x 200mm
    
Three Phase Auto Transformer Controller (ATC Range)
ModelElectrical SupplyMax RatingDimensions (H x W x D)
ATC3-3400v 3ph 50hz3 Amps200mm x 162mm x 100mm
ATC3-5400v 3ph 50hz5 Amps238mm x 190mm x 110mm
ATC3-7400v 3ph 50hz7 Amps310mm x 230mm x 128mm

Notes

Installation
Check that the speed controller supplied is compatible with the fan motor.
Install in a dry sheltered position. Do not install in close proximity to a heat source.
Allow 150mm of free space around the controllers ventilation grilles for airflow.

All wiring must be carried out by a suitably qualified and competent person and comply with current applicable regulations.

PLEASE NOTE THAT ON THE 3 PHASE AUTO TRANSFORMERS THE OUTPUT TO THE FAN IS TAKEN FROM THE MCB WITHIN THE CONTROLLER I.E. THE ELECTRICAL SUPPLY IS WIRED INTO TERMINALS L1,L2,L3 AND THE FAN IS WIRED TO THE MCB.

Operation

Operation
Single phase auto transformer controller ATC1-1.5
Switch the ON/OFF switch (on the side of the enclosure) to the ON position (so the switch is illuminated)
The speed is set using the 5 position (4 speeds and off) rotary switch. 1= minimum speed, 4= maximum speed

ATC1-1.5 Trickle & boost operation
The ATC1-1.5 has the option of connecting a switch device e.g thermostat to terminals 1 & 2. When the switching device
operates the fan will change from trickle speed (as set of rotary switch) to full speed.

Single phase auto transformer controllers ATC1-4,8,10,12
Switch the ON/OFF switch to the ON position (I)
The speed of the fan can now be set using the 5 position rotary switch. 1= minimum speed, 5= maximum speed

Three phase auto transformer controllers & ATC1-16
The speed is set using the 6 position combined on/off /speed setting switch. 0=Off, 1= minimum speed, 5= maximum
speed
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