ABB REL650 Applications Manual page 514

Line distance protection relion 650 series

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Coordinated Universal Time is expressed using a 24-hour clock,

and uses the Gregorian calendar. It is used for 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.

Undervoltage

Weak end infeed logic

Voltage transformer

Three times zero-sequence current. Often referred to as the

residual or the ground-fault current

Three times the zero sequence voltage. Often referred to as the

residual voltage or the neutral point voltage

1MRK 506 334-UUS A

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