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What components make up the "Protection System"
What are:
• Protective relays which respond to electrical quantities,
• Communications systems necessary for correct
operation of protective functions
• Voltage and current sensing devices providing inputs to
protective relays,
• Station dc supply associated with protective functions
(including batteries, battery chargers, and non-batterybased
dc supply), and
• Control circuitry associated with protective functions
through the trip coil(s)