The Electrification of Detroit Traditional Cache
The Electrification of Detroit
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The Detroit Edison Nixon Substation 1956
(Richard M Nixon VP 1953-1956)
The DTE Energy electric system is comprised of two classes of distribution voltages, sub-transmission and distribution, that are served by an ITC-owned transmission system.
The sub-transmission system is used to transmit power and energy from transmission stations to step-down substations, to permit the exchange of power between the system and neighboring utilities, and to accommodate such inadvertent or loop flow power as may occur due to interconnected operations of others.
The sub-transmission system is designed so that reasonably foreseeable normal and contingency conditions do not result in equipment damage or loss of load in a major portion of the system. The majority of faults on an overhead distribution line are transient in nature. Tree branches blown into wires cause a momentary fault as do lightning-induced flashover of insulators. By quickly de-energizing the line and then automatically re-energizing or reclosing it, the fault is usually cleared and the line is returned to service.
When successful, a customer will only see a momentary interruption of power due to a recloser operation instead of a sustained outage if no automatic reclosing was used.
Additional Hints
(Decrypt)
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