Safety instructions
13
NGRM7xx_D00292_07_M_XXEN/02.2022
2.4 Glossary
CD Coupling Device CD-series
CT Current Transformer
FFT Fast Fourier Transformation
HMI Human Machine Interface, display unit
HRG High Resistance Grounding
I
NGR
NGR rated current
I
NGR nom
Nominal current through the NGR
LRG Low Resistance Grounding
NER Neutral Earthing Resistor (NER = NGR)
NGR Neutral Grounding Resistor
NTP Network Time Protocol
PT Potential Transformer
R
NGR
NGR resistance value
R
NGR nom
NGR nominal resistance
R
S
Sense resistor; CD-series coupling device
PLC Programmable Logic Controller
U
NGR
Voltage on the NGR
U
NGR nom
Nominal voltage across the NGR
U
sys
System voltage
UTC Universal Time Coordinated