Glossary
Maschinenfabrik Reinhausen GmbH 2020
397
6385142/08 EN
ETOS
®
ED
Glossary
ASTM
American Society for Testing and Materials
CSO
Change-over selector operation
DGA
Analysis of the gases dissolved in the oil (Dis-
solved Gas Analysis)
EMC
Electromagnetic compatibility
EN
European standard
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
IEC
The International Electrotechnical Commission
(IEC for short) is involved in the preparation and
publication of international standards for electri-
cal, electronic and related technologies.
IEEE
Worldwide association of engineers, mainly from
the fields of electrical engineering and IT (Insti-
tute of Electrical and Electronics Engineers)
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
over the duration of the tap-change operation.
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.
MR
Maschinenfabrik Reinhausen GmbH
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).