19.Glossary
19.1 Terms and abbreviations
19.1.1 Terms and abbreviations
Term
Abbreviation Explanation
Action
The pre-defined set of actions that an alarm initiates. Also known as fail class.
Alarm levels
The number of alarms that can be assigned to an operating value. For example, the
Over-current protection by default has two alarm levels.
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.
Blackout
The busbar voltage is less than 10 % of the nominal voltage, and all generator
breakers are open.
Blind module
A hardware module that consists of only a module faceplate. These are installed
over empty slots, to protect the controller electronics.
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.
Broadcast
When selected information is sent via the DEIF network to other selected ML 300
controllers.
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.
PPM 300 PICUS manual 4189341080 UK
www.deif.com
Page 199 of 213
