GE RPV311, Technical Manual

Page: 278 / 295

Chapter 18
– Wiring Diagrams
RPV311
RPV311-TM-EN-7 278
3-element (Phases A, B and
neutral) connection
: in this case,
the fourth element is synthesized
of the values measured by the
other elements. The three
elements are equivalent to the
values applied to the equipment.
3-element (Phases A, C and
neutral) connection
: in this case,
the fourth element is derived of
the values measured by the
other elements. The three
elements are equivalent to the
values applied to the equipment.
3-element (Phases B, C and
neutral) connection
: in this case,
the fourth element is derived of
the values measured by the
other elements. The three
elements are equivalent to the
values applied to the equipment.
2-element connection : in this
case, the neutral voltage is zero,
and the three phase-to-ground
voltage are computed based on
the two line-to-line voltages
applied to the equipment.
In circuits of 1 element, the measurements can be in two different ways:
An isolated phase or neutral measurement: If the element is a phase, only the voltage
related to this channel is measured considering the off-set compensation. If the
element is a neutral, the voltage related to this channel is measured without the off-
set compensation.
A 3-Phase synthesis: The magnitude for the 3-phases is considered with the same
value as that of the channel measured and balanced (i.e., angles with 120º between
each other).