Term Abbreviation Explanation
Configuration
Assigning input and output functions to terminals, and setting parameters, so that
the controller is suitable for the application where it is installed.
Connected
A generator is connected to the system if it is running, synchronised with the
busbar, and its breaker is closed.
Controller
DEIF equipment that measures system conditions and then uses outputs to make
the system respond appropriately.
Current transformer CT
CustomLogic
The ladder logic system included in the controller software, which can be
configured for customised responses to measured or calculated values.
Digital input DI
Terminals on a controller hardware module that the controller uses to measure a
digital input. A pre-configured digital input function or alarm can be assigned to the
input.
Direct current DC
Engine interface
module 3.1
EIM3.1
A replaceable PCB, with its own power supply. This module includes 4 relay
outputs, 4 digital inputs, an MPU and W input, and 3 analogue inputs. Used in
some of the DEIF controller types.
Firmware
Software that is installed in the controller. This software enables the controller to:
process inputs and outputs, display operating data, keep track of the equipment
status, and so on.
Generator tacho
(measurement/output)
W
A generator tacho measurement. This can be used as a backup measurement for
generator speed.
GENSET controller
Controls and protects a genset (normally a diesel generator). This includes control
of the generator breaker.
Governor GOV Regulates the engine speed.
Hunting
An unstable condition, where the controller causes the frequency or voltage to
swing above and below the set point.
Inhibit
A pre-defined condition that inhibits the alarm action. For example, for the inhibit
ACM wire break, if the controller detects a wire break on the voltage
measurements, the voltage unbalance alarm is prevented from occurring. Inhibited
alarms are not shown in the alarm display.
Internet Protocol
version 4
IPv4
A protocol for communication across networks. IPv4 currently routes the most
traffic on the Internet, but will gradually be replaced by IPv6.
Internet Protocol
version 6
IPv6
A protocol for communication across networks. Among other things, IPv6 has a
much larger address space than IPv4.
Light emitting diode LED Used to show the controller and equipment status and alarms.
Load sharing
The controllers adjust the gensets so that that each genset supplies the right
amount of the total power. For equal load sharing, each genset supplies the same
proportion of its nominal power.
Module
A standardised, replaceable printed circuit board that is mounted in the rack. For
example, PSM3.1 is a hardware module that supplies power to the rest of the rack.
Multi-line 300 ML 300 A DEIF product platform. PPU 300 is part of ML 300.
Nominal setting nom or NOM
Defines the expected voltage and frequency for the system, along with each power
source's maximum load and current. Many of the controller's alarms are based on
percentages of the nominal settings.
Non-essential load NEL
A load that is not critical to the system. These may be disconnected by the
controller in the event of over-load, over-current, or busbar under-current.
PPU 300 Commissioning guidelines 4189341106 UK
www.deif.com Page 71 of 75
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