ABB SPA 650 Series Communication Protocol Manual page 53

1MRK 511 418-UEN A
650 series 2.2 IEC
Communication protocol manual
UV
WEI
VT
3I
O
3U
O
phonetic alphabet stands for "Z", which stands for
longitude zero.
Undervoltage
Weak end infeed logic
Voltage transformer
Three times zero-sequence current.Often referred to as the
residual or the earth-fault current
Three times the zero sequence voltage. Often referred to
as the residual voltage or the neutral point voltage
Section 8
Glossary
47