The most common voltage sources for power system measurements and protections are either wound transformers (voltage transformers) or capacitive divider devices (capacitor voltage transformers or bushing potential devices). Some new… Read more
Dec 19, 2018 | Protection
A circuit breaker is both a circuit-breaking device that can make, withstand and break currents whose intensity is at most equal to its rated current (In), and a protection device… Read more
Dec 17, 2018 | Energy and Power
Connections of private substations to utilities are made more complicated with the addition of private-owned generation facilities. The choice of relays and their placement must be made to ensure adequate… Read more
Dec 12, 2018 | Power Substation
The utility-consumer interconnection provides the path for power flow between supplier (utility) and user (consumer). The interconnection may comprise one or more circuits and is assumed to include voltage transformation…. Read more
Dec 10, 2018 | Power Substation
Switchgear interlocking is installed to protect both the equipment and the operator from dangerous situations caused by incorrect equipment operation. It can be categorized as operational interlocking and safety, or…...
Dec 07, 2018 | Premium Content ♛
This technical article gives key points about the generator protection. To recover the generator from various kinds of faults, the generator protection scheme of the plant must be designed in such… Read more
Dec 05, 2018 | Energy Generation
If the voltage or current in a power circuit are too high to connect measuring instruments or relays directly, coupling is made through transformers. Such measuring transformers are required to… Read more
Dec 03, 2018 | Electrical Lectures
Voltage transformers would have primaries that are either connected directly to the power system (VTs) or across a section of a capacitor string connected between phase and ground (coupling capacitor… Read more
Nov 28, 2018 | Protection
The main purpose of an unbalance detection scheme is to remove a capacitor bank from the system in the event of a failure and fuse operation. This will prevent damaging… Read more
Nov 26, 2018 | Energy and Power
Gas insulated substations (GIS) use circuit breakers, disconnect switches and grounding switches, and have various means of indicating their position, either opened or closed, so the same as in AIS…....
Nov 23, 2018 | High Voltage ♛
