ABB RELION 650 SERIES, Руководство по эксплуатации

Страница: 99 / 102

aeroplane and ship navigation, where it is also sometimes
known by the military name, "Zulu time." "Zulu" in the
phonetic alphabet stands for "Z", which stands for
longitude zero.
UV Undervoltage
WEI Weak end infeed logic
VT Voltage transformer
3I
O
Three times zero-sequence current.Often referred to as the
residual or the earth-fault current
3U
O
Three times the zero sequence voltage. Often referred to
as the residual voltage or the neutral point voltage
1MRK 500 128-UEN B
Section 9
Glossary
650 series 2.2 IEC 93
Operation manual