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 500 125-UEN A
Section 8
Glossary
57
Operation manual