Proven & Endurable Design
The basic variable auto-transformer consists of a copper winding on a toroidal core of laminated, grain-oriented, silicon steel. A carbon brush, connected to an output terminal, is rotated over the length of a precision-ground, commutator track to tap off voltage at any turn from zero volts to the maximum output voltage of the winding.
Unlike a standard fixed ratio transformer, Ashley-Edison (UK) variable transformers are designed to provide an infinitely variable step-less output voltage that can be adjusted from 0 to 117% of the transformer’s nominal input voltage.
Design Features
 | High Efficiency & Excellent Regulation In contrast to current hungry rheostats and other resistive type voltage controllers, Ashley-Edison (UK) variable auto-transformers have an extremely small power loss, delivering efficiency of 98% or better. Within the transformer ratings, our variable transformers deliver, from no-load to full-load current, negligible variation in output voltage. |
| Distortion Less Voltage Control Due to the superiority of the core design and quality of the steel grade utilized, Ashley-Edison (UK) Variable Transformers provide a facsimile of the input waveform with negligible distortion – an essential feature required by many electronic applications. |
| Low Operating Torque Due to the ultra-smooth commutator surface, correct and constant contact pressure of the brush on the commutator, combined with the firm positioning of the coil and internal components ensures all Ashley-Edison(UK) Variable Transformers deliver a low operating torque. |
| Trouble-Free Mechanical Construction for Long Life All Ashley-Edison (UK) variable transformers are designed for heavy-duty and trouble-free operation. Built to exacting mechanical tolerances, using the finest materials available, the quality of design and build ensures minimal maintenance requirements and enhanced design life. |
| Negligible Maintenance When operated in accordance with the operating instructions, the only component that may require periodic inspection and occasional replacement are the brushes. As the brushes are made of a special highly endurable carbon and the design ensures proper contact with the commutator at all times, the need for replacement is infrequent. |
| Straight forward Install & Use Whether for bench use or panel mounting, installation, mounting, and use is designed to be easy. Terminals are easily accessible – screw or lug. Output, on manually operated variable transformers, is controlled by either clockwise or anti-clockwise knob rotation. |
| International Standards Compliance & CE Certification All Ashley-Edison (UK) variable transformers are designed and manufactured to comply with all relevant International Standards and appropriate European Union CE Directives. |
