It's Time to Take Control

Turning off lights and equipment when they're not in use is one of the most cost-effective ways to conserve energy and save money. Unfortunately, building schedules can be complicated and it's often difficult to get staff to cooperate. Electronic programmable time controllers optimize energy savings while maintaining comfort and convenience.

Time control features and options

You have choices when it comes to selecting electronic time controls; they range from basic, wall-mounted time switches to multi-channel time clocks with a variety of scheduling options. Some control programs include features similar to an energy management system.

In settings where occupancy sensors aren't practical, simple time switches can be used to turn equipment off at preset time intervals. They're convenient to use and offer functional advantages over traditional twist dial timers.

Multi-channel time clocks are a great choice for controlling numerous devices. Electric panelboards are now available with solenoid operated remote-control circuit breakers which provides the switching function of lighting relays. Power parameters such as voltage, current, power and energy consumption can be measured on all branch circuits plus mains.

Look for the following features:

• Scheduling flexibility. The number of programmable switching cycles varies with each system, but most allow precise time settings as well as weekly and daily scheduling options. Look for units that reset automatically for daylight saving time and leap year.
• Advanced warning. Time clocks with this feature sound alarms or flash lights before selected equipment is started.
• Override. It's important to be able to override the timing system if equipment starts quickly or unexpectedly.
• Power backup. A power outage can throw off a carefully planned system of timing controls. Make sure your system includes reliable backup power, such as batteries or capacitors.
• Durability. Wear and tear on electronic controls can reduce their effectiveness or cause them to fail. Locate them in areas where they'll be safe from damage or temperature extremes.

For additional lighting control, consider installing occupancy sensors in areas with varying use, such as restrooms, conference rooms and storage facilities. Occupancy sensors typically cost less than $150 to install, and they save energy by turning lights off automatically when occupants leave the room.

Electronic timers range in price from around $120 to more than $1,000, depending on the type of device and the features offered. No matter what type of system you choose, timer controls are a simple and cost-effective way to reduce energy consumption.