In April 2003, a wind turbine manufacturer contacted S&C regarding the availability of 38-kV switchgear suitable for switching and protecting their wind turbine generating towers. Eighty one-way units were required for a large new windfarm located in Wyoming. The caveat: the gear had to fit through a 23 x 54 inch doorway located in the base of the tower.
Although no product currently available met the dimensional requirements of the application, S&C’s Metal-Enclosed Gear Products Division explored the possibility. In remarkably short turnaround time, they designed a special type of Vista Underground Distribution Switchgear that met the size needs. Continue reading
S&C is pleased to announce the availability of a 138-kV Mark VI Circuit-Switcher specifically designed for switching single or back-to-back ungrounded capacitor banks up to 95 MVAR. This new model features a high 31.5-kA fault-interrupting rating and 3-cycle interrupting time. It utilizes interrupters that have been specially modified to withstand the TRVs associated with ungrounded capacitor bank switching at 138 kV, along with specially modified operating mechanisms. Continue reading
The Montrose Harbor Electrical Vault, owned and operated by the Chicago Park District, fell victim to a catastrophic circuit breaker failure which resulted in an explosion and devastating fire. The vault had been served by two incoming sources connected to exposed overhead bus. Each source supplied four feeders. A tie switch allowed either source to serve both sides of the vault.
After the fire, the south side of the vault was completely inoperable and several critical loads were without power. The only way to restore to these loads was to reconfigure downstream feeders and supply the entire load from the north side of the vault. Since the north side of the vault also experienced fire damage, it was extremely important to restore service to both sides as quickly as possible, before further damage could occur. Continue reading
S&C is pleased to introduce a new version of Trans-Rupter II Transformer Protector, Model EX rated for application down to -50°C . . . now with enhanced secondary-side interrupting ratings. Transformer protective devices such as circuit breakers rated for application down to -50°C are often quite expensive; Trans-Rupter II provides a much more economical alternative for sophisticated primary-side transformer protection. Continue reading
Plant Engineering is a major industry publication in facilities engineering. Thus, S&C is pleased to announce that the magazine named S&C–Chicago’s John R. Conrad Industrial Complex (JRCIC) as one of the winners of the publication’s Top Plant award for 2004. Continue reading