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Breakers & Relays


Circuit Breaker Lubrication

Developing circuit breaker lubrication procedures BY RICK YOUNGBLOOD, Doble Engineering Company Circuit breaker analyzers are used to determine operating speeds and velocity. This information enables the tester to determine if a breaker is safe to place back into service. The data recorded by a...

Substation Technologies


Physical Security & Monitoring


Geomagnetic Disturbances: A Danger to the Power Grid

In 1989, the Québec grid collapsed as equipment protection relays tripped in a cascading sequence of events. Six million consumers were left without power for up to nine hours. The cause of this major outage was a geomagnetic disturbance (GMD). Geomagnetic disturbances occur during solar...

Substation Automation


Substation Protection


Transmission Planning for Grid Security

Recent physical attacks on substations have heightened the industry’s awareness of the necessity for physical security of critical facilities on the bulk power system. The goal of the North American Electric Reliability Corporation (NERC) Critical Infrastructure Protection (CIP) reliability...

Substation Testing & Maintenance


Electrical Substations

non-flammable aerosol fluid

SAME DAY SWITCHING

Same day switching avoids the extended outages and human and equipment costs associated with inoperable and broken switches.
The vast majority of air break disconnect and ground switches in electric power networks typically receive no appreciable maintenance. This invariably results in the inability to operate switches when needed. A pretreatment method is now available that is safe to use on energized switches. It consists of a remote radio-controlled hot stick tool and a non-flammable aerosol...

Electrical Substations Articles