electric plant terms

Bus

It is pysical interface where many circuits share the same electrical connection.

Terminal voltage

Present at the generator output terminals is described as the generator terminal voltage

Bus tie circuit breaker

Used to connect or disconnect one bus, such as that in a switchboard, to another bus.

Generator circuit breaker

The breaker used to connect the generator output terminals to the bus

Droop

Mode of governor operation normally used only for paralleling with shore power.

Synchronous

It defines a relationship between generators

Isochronous

the generator is operating at the same speed, regardless of load.

Rated power factor

The power factor at which a generator is designed to operate

Reverse power

A condition under which a generator absorbs power from the bus, effectively acting as a motor

Kva rating

Rating of a generator is an expression of it power generating capacity

Voltage regulation

Expressed as a percent, it is a measure of the ability of the generator to maintain its rated output voltage

Split plant

When the bus tie circuit breakers are closed and all generators are capable of supplying power to all loads

Single up

Refers to an electrical plant configuration in which only one generator is connected to the bus, supplying power to all connected loads

Shifting the load

Refers to the operation of moving the electrical plant load from one generator to another.

Parallel plant

When the bus tie circuit breakers are closed an all generators are capable of supplying power to all loads.