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Electromagnetic Relay
Electromagnetic relays are those relays which are operated by electromagnetic action. Modern electrical protection relays…
Posted inProtection Switchgear
Zones and types of Protection system
Zones of Protection system · An electric power system is divided into several zones of protection.…
Posted inProtection Switchgear
NATURE &EFFECT OF TRANSFRMER FAULTS
A faults on transformer winding is controlled in magnitude by a) Source & neutral earthing impedance…
Posted inProtection Switchgear
TRANSFORMER PROTECTION
• The power transformer is one of the most important links in a power transmission and…
Posted inPower System Operation and Control
SCADA REQUIRES COMMUNICATION BETWEEN MASTER CONTROL STATION AND REMOTE CONTROL STATION:
Leased-wire means use of a standard telephone circuit; this is a convenient and straightforward means…
Posted inPower System Operation and Control
SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA)
· There are two parts to the term SCADA Supervisory control indicates that the operator, residing in the…
Posted inPower System Operation and Control
ENERGY MANAGEMENT SYSTEM (EMS)
· The EMS is a software system. Most utility companies purchase their EMS from one or…
Posted inPower System Operation and Control
Forms of Computer Process Control
There are various ways in which computers can be used to control a process. First,…
Posted inPower System Operation and Control
PMU
Stands for "Power Management Unit." The PMU is a microcontroller, or integrated circuit, that controls the…