Development and construction of automatic three-phase power changeover control circuit with alarm
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Description
One primary reason for Nigeria economic underdevelopment is the inconsistency of
power supply, and as a result of this fact, immediate attention is required. The criticality of an
uninterrupted power supply cannot be overemphasised. Therefore, is this work, a new approach
is applied to switch power from a three-phase source to another without human interference. This
work presents an automatic three (3) phase power changeover circuit with an alarm that turns
power supply from Power Holding Company of Nigeria (PHCN) to a power generator at an
instant of interruption or outage from PHCN. The signal is introduced to notify the user of the
restoration of the PHCN supply and automatically carries out this process. This process is
achieved by using logic control circuits, three-phase sequence monitors, phase(s) failure monitor,
overload relay, and contacting relays for practical switching which takes approximate 30
seconds.
Keywords
T Technology (General), TK Electrical engineering. Electronics Nuclear engineering