San Francisco Hit By Power Outages

Sporadic power outages hit downtown San Francisco on Tuesday, apparently the result of breakers opening in the transmission system at a nearby Pacific Gas & Electric substation.

07/25/2007


Sporadic power outages hit downtown San Francisco on Tuesday, apparently the result of breakers opening in the transmission system at a nearby Pacific Gas & Electric substation. Pedestrians on that particular stretch of Mission Street witnessed flames shooting from a manhole, according to a report today from ABC7 news in San Francisco.

The two-hour long power outage affected everything from traffic lights to cable cars, and as many as 50,000 customers lost power, mostly in the financial district.

The incident comes after a number of incidents in recent years have heightened concerns about PG&E equipment.

PG&E announced that the utility had restored power to approximately 40,000 customers after transmission breakers at the company’s Martin Substation opened, causing outages concentrated in San Francisco’s Financial District and the Cow Palace area of the peninsula. The initial event occurred at approximately 1:30 pm, and power was restored to all affected customers by approximately 3:30 pm.

PG&E received reports of an underground explosion on Mission Street between First and Second Streets at approximately 2:30 p.m., the utility reported. Inspection showed that a subsurface transformer failed. However, contrary to preliminary indications, updated reports indicate that this event was not the initiating cause of the larger outages. The company is investigating the cause of the transformer failure.





No comments
Consulting-Specifying Engineer's Product of the Year (POY) contest is the premier award for new products in the HVAC, fire, electrical, and...
Consulting-Specifying Engineer magazine is dedicated to encouraging and recognizing the most talented young individuals...
The MEP Giants program lists the top mechanical, electrical, plumbing, and fire protection engineering firms in the United States.
Combined heat and power; Assessing replacement of electrical systems; Energy codes and lighting; Salary Survey; Fan efficiency
Commissioning lighting control systems; 2016 Commissioning Giants; Design high-efficiency hot water systems for hospitals; Evaluating condensation and condensate
Solving HVAC challenges; Thermal comfort criteria; Liquid-immersion cooling; Specifying VRF systems; 2016 Product of the Year winners
Driving motor efficiency; Preventing Arc Flash in mission critical facilities; Integrating alternative power and existing electrical systems
Putting COPS into context; Designing medium-voltage electrical systems; Planning and designing resilient, efficient data centers; The nine steps of designing generator fuel systems
Designing generator systems; Using online commissioning tools; Selective coordination best practices
As brand protection manager for Eaton’s Electrical Sector, Tom Grace oversees counterfeit awareness...
Amara Rozgus is chief editor and content manager of Consulting-Specifier Engineer magazine.
IEEE power industry experts bring their combined experience in the electrical power industry...
Michael Heinsdorf, P.E., LEED AP, CDT is an Engineering Specification Writer at ARCOM MasterSpec.
click me