10.Glossary
10.1 Terms and abbreviations
10.1.1 Terms and abbreviations
Term
Abbreviation Explanation
Action The pre-defined set of actions that an alarm initiates. Also known as fail class.
Alternating current AC
Alternating current
module 3.1
ACM3.1
A replaceable PCB with voltage and current measurement inputs. Used in the
DEIF controller.
Analogue input AI
Terminals on a controller hardware module that the controller uses to measure an
analogue input. The analogue input type and range are typically selected during
commissioning from a list of pre-configured voltage, current, and resistance
measurement input ranges. A pre-configured analogue input function or alarm can
also be assigned to the input.
Analogue output AO
Terminals on a controller hardware module that the controller uses to send an
analogue output. The analogue output type and range are typically selected during
commissioning from a list of pre-configured voltage and current output ranges. A
pre-configured analogue output function can also be assigned to the output.
Apparent power S The 3-phase apparent power, measured in kVA.
Automatic voltage
regulator
AVR
Regulates the genset voltage. The AVR is third-party equipment. The AVR can
have a fixed voltage set point. Alternatively, the DEIF controller can control the
AVR.
Base load
The generator supplies a constant load. For GENSET controllers, configure the
asymmetric load sharing parameters to have a base load from a specific genset.
Blackout
The busbar voltage is less than 10 % of the nominal voltage, and all generator
breakers are open.
Breaker
A mechanical switching device that closes to connect power sources to the busbar,
or to connect busbar sections. The breaker opens to disconnect the power sources
or to split the busbar.
Busbar
The copper conductors which connect the power sources to the power consumers.
Represented on the single-line diagram as the line that connects all the power
sources and power consumers. If the bus tie breaker is open, there are two
separate and independent busbar sections. Similarly, if the bus tie breaker is
closed, there is only one busbar.
Bus tie breaker BTB
Physically disconnects two main busbars from each other, so that they operate as
two separate (split) busbars. Also reconnects split busbars so that they operate as
one busbar. A BUS TIE breaker controller can control a bus tie breaker.
BUS TIE breaker
controller
Controls and protects a bus tie breaker. The controller ensures that opening the
bus tie breaker does not lead to a blackout. The controller also ensures that the
two busbars are synchronised before closing the bus tie breaker.
Commissioning
The careful and systematic process that takes place after installation and before
the system is handed over to the operator. Commissioning must include checking
and adjusting the controller.
Common terminal COM
This is generally connected to either a power source, or the supply return. See the
wiring examples for more information.
PPU 300 Commissioning guidelines 4189341106 UK
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