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11-2
Abbreviations and Symbols
LAN
Latching
NTP
pu
RMS
SNTP
TCS
THD
UTC
WWW
857-UM001A-EN-P – July 2009
Local area network. Ethernet based network for computers and
relays.
Output relays and indication LEDs can be latched, which means that
they are not released when the control signal is releasing. Releasing
of lathed devices is done with a separate action.
Network time protocol for LAN and WWW
Per unit. Depending of the context the per unit refers to any nominal
value. For example for overcurrent setting 1 pu = 1xI
Root mean square
Simple Network Time Protocol for LAN and WWW
Trip circuit supervision
Total harmonic distortion
Coordinated Universal Time (used to be called GMT = Greenwich
Mean Time)
World wide web ≈ internet
.
GN
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