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DIMMTRONIC Leading Edge and Trailing Edge Dimmers

Introduction to Dimming Methods

Basically there are two main dimming methods today. Each of these is suitable for different types of loads. Please also refer to the recommendations by the manufacturers of lamps and other controls.

Leading Edge Dimming - the early part of each sine half wave is chopped off

Suitable for
  • All resisitive loads (ordinary incandescent lamps, high voltage Halogen, etc.), marked with „R“
  • All inductive loads (Coils, low voltage halogen with conventional transformer, etc.), marked with „L“
So a marking "RL" indicates the suitability of a dimmer for resistive and inductive loads. Not allowed on these dimmers are capacitive loads (see below).

Trailing Edge Dimming - the latter part of each sine half wave is chopped off

Suitable for
  • All resistive loads
  • All capacitive loads such as Low-Voltage Halogen transformers or primary dimming electronic ballasts. Indicated by a "C").
Do not operate inductive loads on this kind of dimmers - this will usually destroy the dimmer. Resistive loads are suitable for both dimming methods. However, Trailing Edge Dimming offers a softer mode of operation for the lamps and will extend lamp life.

Please note that some of the cheaper trailing edge dimmers in the market are only suitable for resisitive loads.

 

Housing types

DIN rail mounting

Din rail dimmers for both Trailing Edge and Leading Edge Dimming with a variety of control options. For mounting in switchboards and sub distributions (with = 6 fuse units). Also to this goup belongs the DIA-Controller with which you can preset and reproduce a number of light scenes. The integrated shutter control coupling makes this ideal for use in media and conference rooms.

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Wallbox mounting into standard 55 mm wall boxes

Leading and Trailing Edge Dimmers with maximum power ratings between 300V and 1.000VA.

This group also contains speed controls (e.g. for ventilation fans), electronic potentiometers for 1..10V applications as well as shutter controls.
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