Glossary
Maschinenfabrik Reinhausen GmbH 2020
348
4453918/14 EN
ETOS
®
TD
Glossary
CSO
Change-over selector operation
DGA
Analysis of the gases dissolved in the oil (Dis-
solved Gas Analysis)
DTR
Dynamic Transformer Rating
Generator sign convention
Definition for describing electrical circuits. The ar-
rows for current rating and voltage on a "con-
sumer" absorbing electrical power (e.g. a resis-
tor) face opposite directions. U*I is the power
generated in the component and -U*I is the
power absorbed by the component.
GPI
General Purpose Input
GPO
General Purpose Output
Hot-spot
Point of highest temperature in the transformer
winding.
ICD
IED Capability Description
IEEE
Worldwide association of engineers, mainly from
the fields of electrical engineering and IT (Insti-
tute of Electrical and Electronics Engineers)
IFM
Insulation-friendly mode
IP
Internet Protocol
Load sign convention
Definition for describing electrical circuits. The ar-
rows for current rating and voltage on a "con-
sumer" absorbing electrical power (e.g. a resis-
tor) face the same direction. U*I is the power ab-
sorbed by the component.
Motor Current Index
Integral (area under) of the motor current curve in
accordance with IEEE PC57.143
MQTT
Message Queuing Telemetry Transport. A net-
work protocol for machine-to-machine communi-
cation which enables the transmission of ISM®
data in the form of messages between two de-
vices.
OLTC PreCheck
Check of the on-load tap-changer operating con-
ditions prior to a tap-change operation to prevent
damage to the on-load tap-changer and trans-
former.
PRD
Pressure relief device
PRP
Redundancy protocol in accordance with IEC
62439-3 (Parallel Redundancy Protocol)
PTP
PTP (Precision Time Protocol) is a standard for
synchronizing clocks in a computer network. This
synchronization is high-precision.
RADIUS
Protocol for authentication of users in computer
networks in accordance with RFC 2865 (Remote
Authentication Dial-In User Service).
RSO
Reverse tap-change operation
Summary of Contents for ETOS TD
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