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</center><p>Recovery from catastrophic battery and/or equipment failure. Factors affecting the number of systems are the need for more than one voltage level and the need for duplicating systems. Operating time for MOSseconds. Today, normal DC auxiliary supply systems in power substations are operating either on the V or V level, though lower levels exist Saft BatterySizing – Battery capacities and discharge ratings are published based on a certain temperature, usually betweenoF &oF. – Battery performance reases at lower temperatures and must be accounted for with correction factors. Performance and  Today, normal DC auxiliary supply systems in power substation are operating either on the V or V level, though lower levels exist. Battery capacities and discharge ratings are published based on a certain temperature, usually betweenoF &oF. Battery performance reases at lower temperatures  This paper explores the use of mobile DC power systems for three specific applications. Transformer T1 differential: TripCB1,CB3,CB1 OpenDTBreaker Failure onCBOpenCB2, OpenD3, RecloseCBTiming: T=0cy (0 sec) TripCB1,CB3,CB1, openDT1 Current=12+12+8+60=92A DC System Redundancy for Site Loads Mobile DC Power System Description Overview Mobile DC Power Systems are typically engineered and equipped with battery chargers, batteries, AC/DC meters and controls including ancillary safety equipment in accordance with applicable IEEE Design and Installation Practices for Stationary Batteries and DC – Lead Acid – Temperature correction factor applied at the end of the calculation •The substation batteries for the DC system must be in operation/7 – – NOT just for backup power, but also to provide the current needed for day-to-day switching operations •Charger provides current for the load & a float current to charge the battery •Charger alone DO NOT provide enough current if the load exceeds the charger 12D3 is normally closed, no generation on feeder circuits. Some systems at the substation  Two cases of selection of lead-acid batteries for the backup supply of a DC auxiliary system in a transmission substation are presented in the paper, where the input data  The substation batteries for the DC system must be in operation/7 – – NOT just for backup power, but also to provide the current needed for day-to-day switching DC voltage V or V. A power substation can have one or several DC systems.</p></translate>
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