Conventional lateral circuit protection has required some concessions. Over 90% of temporary faults on overhead distribution circuits occur on laterals. Over the years, utilities have dealt with lateral protection in a couple of ways.
Some utilities employ a “fuse blowing” philosophy: The substation feeder breaker is properly coordinated with the lateral fuse, so that the fuse will clear any downstream fault within its rating . . . not the breaker. Continue reading
S&C is known throughout the industry as an innovator, with recent new product introductions including the IntelliRupter PulseCloser and TripSaver Dropout Recloser. S&C has continually launched such breakthrough products throughout its history, and one such product was the Loadbuster Loadbreak Tool. The Loadbuster tool, introduced 50 years ago, revolutionized the way utilities could perform switching of distribution equipment installed on their system. Today, Loadbuster can be found switching loads on utility systems around the world.
As Loadbuster celebrates 50 years of service, this article recaps the many benefits of the original lightweight, easy-to-use portable loadbreak tool. Continue reading
The IntelliRupter PulseCloser allows testing of the line . . . without straining the system.
Automatic circuit reclosers have long been applied for feeder protection in overhead distribution systems . . . generally to keep the lights on. Their mission is quite simple: detect a fault on the line, trip the interrupter to clear the fault, and then test the line to see if the fault is still there. If the fault is gone, the lights come back on. Continue reading
Desert Diamond Casino, located near Tucson, Arizona, was experiencing frequent power disturbances that affected gaming operations, as well as security of the facility.
The casino was protected by a conventional uninterruptible power supply, applied in conjunction with a standby generator. But the existing UPS was unreliable and required frequent, costly maintenance. When it malfunctioned, all gaming machines — along with the facility’s security system — experienced a complete power outage until the generator started up and went on line. Gambling revenue was impacted and security was compromised. Continue reading
United Materials, of Great Falls, Montana, operates a large mining facility. It had been powered by five diesel generator sets, ranging in size from 500 to 1000 kW. But the high costs of diesel fuel and generator maintenance, along with reliability concerns, led the owner to consider other options.
Working with Exergy Development Group and S&C’s Power Systems Services, United Materials decided to construct a wind farm with an interconnection to the transmission system of the serving utility, Northwestern Energy. Continue reading
“UPS: for When the Grid Goes Down”. Power provided by the grid is more than up to the job of powering lights and motors, but when you want to power tele- and data communications equipment, or if you are manufacturing microelectronics, you need to take the power that comes from the utility and clean it up. The right kind of UPS (uninterruptible power supply) not only can keep the equipment running during a power failure, it can also provide a clean source of power. Click here to read the entire article.