Featured Articles

rss
  • Input Sensors – Your eyes, fingers and…more?

    No need to "eyeball" it any more. Input sensors take the place of our human senses… and do a great job of it, to boot.

    There are several types of input sensors. One of the first I encountered was the photo electric sensor or photo eye. These eyes controlled remote relays with a set of integrated mechanical contacts. Located inside the sensor body, the contacts changed state with a tiny magnetic relay.

    Read more
  • Choosing the Right Input Sensor

    With so many types of input sensors available, you need to narrow down your selection to what will give you the feedback required. As with human "input sensors," each type has a dedicated function. You need to match the sensor with the object being sensed and what that feedback does.

    Another consideration is the action taken when the sensor notices a change of state. In our human example, a sudden bright light sends a signal to the brain, causing us to shield our eyes.

    Read more
  • Overcurrent Protection Designed for PV

    Direct-current (DC) electrical distribution is certainly nothing new – in fact, the technology was the basis for Thomas Edison’s original designs back in the 1880s. While alternating current (AC) distribution has since become more prevalent, the rapid growth in solar photovoltaic (PV) installations and more recent interest in energy storage has electrical contractors paying attention to DC requirements all over again.

    Read more
  • New Fuses Address Arc-Flash Risks Posed by Medium-Voltage Connections

    Despite the volumes that have been written regarding the dangers of arc-flash to electrical workers, many facilities are still working to address the risks in their own facilities. It can be a complicated issue, with what can often be multiple layers of hazards.

    Of course, the first line of defense is personal protective equipment (PPE), and tremendous advances have been made in this area over the last decade.

    Read more
  • Combining Dimming with Other Commands – It’s a Bright Idea

    The possibility of enhanced energy savings is a big driver behind the adoption of dimmer switches – but what about all those table lamps in a typical home that aren’t controlled by a wall switch? Or when light dimming is part of an effort to set a scene or make a room more comfortable? Thanks to the “internet of things,” consumers are gaining new options for controlling new devices – such as table lamps – and grouping together the operations of multiple device types – such as, say, lighting and fans – using a single remote control or mobile-device app.

    Read more
  • Matching Dimmers and Bulbs Is Critical to Successful LED Conversions

    Dimming switches and LED light bulbs seem like they should be a perfect match, right? Both products offer end-users advanced capabilities for controlling a room’s light and lowering energy bills in a home or building. Unfortunately, as many have discovered, ensuring compatibility between dimmer switches and the LED bulbs they’re controlling is a bit more complicated than previously was the case with old-school incandescent bulbs. However, this situation is improving quickly as…

    Read more