Podcast
Questions and Answers
What is the primary function of a power transformer in a substation?
What is the primary function of a power transformer in a substation?
- To scale down actual power system quantities for metering
- To convert high-voltage power to low-voltage power and vice versa (correct)
- To interrupt current flow in the line
- To isolate or deenergize equipment for maintenance purposes
What is the purpose of a current transformer?
What is the purpose of a current transformer?
- To scale up high magnitude of current flowing in high-voltage conductors
- To measure voltage levels
- To transfer load from one source to another
- To scale down the high magnitude of current flowing in high-voltage conductors (correct)
What is the main function of a circuit breaker in a substation?
What is the main function of a circuit breaker in a substation?
- To scale down actual power system quantities for metering
- To interrupt current flowing in the line, transformer, bus, or other equipment when a problem occurs (correct)
- To cancel out the lagging current effects from motors and transformers
- To improve the operating efficiency of electric power systems
What is the primary purpose of a disconnector switch in a substation?
What is the primary purpose of a disconnector switch in a substation?
What is the main function of a lightning arrester in a substation?
What is the main function of a lightning arrester in a substation?
What is the purpose of a voltage transformer in a substation?
What is the purpose of a voltage transformer in a substation?
What is the main function of a capacitor bank in a substation?
What is the main function of a capacitor bank in a substation?
What is the effect of capacitors in electric power systems?
What is the effect of capacitors in electric power systems?
Study Notes
Substation Equipments
- Power transformers convert high-voltage power to low-voltage power and vice versa, allowing power to flow in both directions.
Instrument Transformers
- Instrument transformers scale down actual power system quantities for metering, protective relaying, and/or system monitoring equipment.
- Current transformers (CTs) scale down high-magnitude currents in high-voltage conductors to a safer level for working.
- Voltage transformers (PTs) scale down very high voltages to safer levels for working.
Circuit Breakers
- Circuit breakers interrupt current flow in lines, transformers, buses, or other equipment when a problem occurs and power needs to be turned off.
Disconnector Switches
- Disconnector switches isolate or de-energize equipment for maintenance purposes.
- Disconnector switches transfer load from one source to another.
Lightning Arresters
- Lightning arresters have the same purposes as disconnect switches.
Capacitor Bank
- Capacitors improve the operating efficiency of electric power systems.
- Capacitors help transmission system voltage stability during disturbances.
- Capacitors cancel out lagging current effects from motors and transformers.
- Capacitors reduce system losses and provide voltage support.
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Description
Learn about the essential components of a substation, including power transformers and instrument transformers, and their roles in converting high-voltage power to low-voltage power.
