For distribution substations where space is at a premium, S&C offers Trans-Rupter II with Circuit-Isolator II Disconnect. This three-pole, group-operated, vertical-break style disconnect provides a visible air gap to isolate the transformer during maintenance.
The Circuit-Isolator II Disconnect is furnished with a manual operating handle. If desired, it instead can be furnished with an S&C Type DS-1 Switch Operator, providing remote power operation capability. Trans-Rupter II with Circuit-Isolator II is furnished with S&C Mounting Pedestals, making for an exceptionally compact footprint. The mounting pedestals include a support frame that comes complete with all necessary interphase wiring and conduit, greatly reducing installation time and total installed cost. Continue reading
S&C is pleased to announce the availability of a 69-kV Three-Pole Double-Break Style Alduti-Rupter Switch, in both upright and tiered-upright mounting configurations. This new model provides an economical option for transmission-line switching and the time-proven reliability of the Double-Break Style Alduti-Rupter Switch. Continue reading
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