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I.L. 40-386.12
marks of the Line potential device and selecting the "polarity mark" voltage with jumper P12.
V
V
That is, if the Line voltage is
, set jumper P12 for the
position. Selection of the Bus voltage
AB
a
reference described assumes phase rotation ABC. If the phase rotation is ACB, the Bus voltage
V
reference would be
. Synchronism voltage input reference to "Line" voltage and "Bus" voltage
b
can changed using the Synch Volt setting. For example, if the Synchronism Voltage input is from
what would be referred to as the "Bus", the Synch Volt setting could be changed for correct LED,
LCD and targeting displays
The 120 volt, phase to phase synchronism voltage option (i. e. REL 301/302 style number, digit
o
6 is a T) corrects for the 30
phase shift difference between line to neutral protection voltage in-
put and line to line synchronism voltage input. Components have been added to hardwire the
"Bus-Line Angle"
phase shift compensation. Hence when viewing the
on the Man-Machine
o
Interface (MMI) display, synchronism is represented by 0
angular difference between Bus and
o
Line voltages, not -30
.
HBDL
HLDB
If voltage checking (
or
) is to used, either independently or with synchronism
"V Max"
checking, the setting of voltage threshold
is with reference to a 50-120 volts scale. In
"V Max"
"V Max"
"100 Volts"
other words if
(Live voltage) is desired to be 100 volts, set
to
. The
"V Min" with a range
same is true for
0-50 volts.
All other settings for operation of REL 301/302 reclosing are the same as the 70 Volt Synchro-
nism voltage relay.
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