What is trailing edge leading edge?

Leading-edge: inductive loads (e.g. magnetic low voltage transformers), resistive loads (e.g. incandescent). Trailing-edge: capacitive loads (e.g. electronic low voltage transformers, LED drivers), resistive loads (e.g. incandescent).

What is the difference between leading and trailing edge dimmer?

When looking at regular mains dimming, there are two main types of light dimmer to look out for. Dimmer switches using leading edge technology cut off the front edge of the half cycle of each AC wave, whereas trailing edge dimmers cut off the second half of each half cycle.

What is trailing edge phase dimming?

Trailing Edge Dimming (electronic dimming) utilizes a current that is turned off as the AC waveform ends, right before it crosses zero. This type of dimming is typically used with electronic drivers, and does not result in a rush of voltage (and in turn, a rush of current) to the light source.

What is a trailing edge LED?

These more modern dimmers have many benefits over the leading edge type. These improvements include smoother dimming with less buzzing and interference. Trailing edge dimmers have a much lower minimum load than the leading edge, making them far more suitable for powering LEDs.

Are Lutron dimmers leading edge?

Standard phase control or “leading edge.” With standard phase control, the dimmer does not provide power until sometime later into the line cycle. Lutron magnetic low-voltage dimmers are designed to withstand these spikes and surges.

Is triac dimming leading edge?

All TRIAC (Triode for Alternating Current) based dimmers are leading edge dimmers. Flickering in LED lamps may occur due to the fact these devices are generally driven by LED drivers utilizing regulated power supplies that supply regulated current and voltage to the LED lamps from AC utility lines.

What are the two types of phase cut dimming?

Phase-cut dimmers can operate on the leading edge (forward phase-cut) or trailing edge (reverse phase-cut) of the waveform.

What is standard phase dimming?

Phase control is a dimming technique based on the electric wire that is often used for halogen and incandescent lamps. It “clips” part of the sine wave of the alternating current to dim the light.

Are LED leading edge dimmer?

Leading edge dimmers are suitable for inductive load, for example magnetic low voltage transformers; and resistive loads like incandescent light bulbs. They are generally unsuitable for LED light bulbs.

Is MLV dimming forward or reverse phase?

MLV and some Fluorescent controls explicitly require forward phase controls due to their architecture. MLV loads convert the output from the dimmer to a low voltage output, so that smaller 12V or 24V lamps can be used.

What is ELV vs MLV?

Magnetic Low Voltage (MLV): Dimmers designed to be used with a magnetic driver. This feeds the power out in a way that the driver can read and respond to without damaging the driver hardware. Electronic Low Voltage (ELV): Like the MLV dimmer, the ELV dimmer is designed for us with an electronic driver.

Is TRIAC dimming forward or reverse phase?

Forward Phase (Leading Edge) Controls The most common technology used to produce forward phase controls is Triac based dimming. In this type of dimming, a semiconductor acts as a switch, controlling both positive and negative half cycles.

What’s the difference between leading edge and trailing edge dimmers?

There are also other differences between the two types of dimmers… Leading-edge dimmer switches are cheaper and simpler than trailing-edge, and were used originally to dim incandescent and halogen bulbs or wirewound magnetic transformers.

What’s the difference between leading and trailing LEDs?

Both types of dimmer can work with dimmable LEDs however due to its advantages, trailing edge is the preferred and as such LED manufacturers have designed their retrofit lamps to work best with this type.

What are the different types of phase control dimmers?

The two types of phase control dimmer available are ‘trailing-edge’ and ‘leading-edge’. These two different types work in different ways. Because they work differently, this ultimately affects their compatibility with certain light forms: