Uganda Electricity Transmission Company Substation Operator Interview Questions, Process, and Tips

Components of a protection scheme include relays, circuit breakers, current transformers, and communication systems.

• Relays: Devices that detect abnormal conditions and initiate corrective actions.

• Circuit breakers: Devices that interrupt the flow of electricity when a fault is detected.

• Current transformers: Devices that measure current and provide input to protective relays.

• Communication systems: Allow relays to communi...read more

Substation equipment includes transformers, circuit breakers, relays, switches, and meters.

• Transformers: Step up or step down voltage levels

• Circuit breakers: Protect circuits from overloads or short circuits

• Relays: Control the operation of circuit breakers

• Switches: Control the flow of electricity

• Meters: Measure electricity usage

A single line diagram shows the electrical connections and components in a substation.

• Start with the incoming transmission lines

• Include transformers, circuit breakers, switches, and other equipment

• Show the distribution lines leaving the substation

• Label all components and connections for clarity

Relays in equipment are used to control the flow of electricity by opening or closing circuits based on certain conditions.

• Relays act as switches to control the flow of electricity in equipment.

• They are used to isolate circuits, protect equipment from overload, and control the operation of various components.

• Relays can be electromechanical or solid-state, depending on the application.

• Examples include protective relays ...read more

A backup system is necessary to ensure continuity of operations in case of primary system failure.

• To prevent downtime and maintain productivity

• To provide redundancy and ensure reliability

• To protect against data loss and security breaches

• To comply with regulatory requirements and industry standards