
17
Modes 16 & 17: Base 1 Uni-polar Segmented
These modes are used for LTC monitoring when the lowest tap number is
1
. There
may be multiple neutral taps. They can be located anywhere between the lowest and highest
taps as long as they are grouped together in one section. Mode 16 has a linear analog output
that continuously varies with LTC shaft position. Mode 17 has a stepped analog output that
jumps with each tap change. To select this operating mode, use the
OP 2, Func, MODE
command to change the value to
“16”
or
“17”
.
Figure 2.4 Base 1 Uni-polar Mode Analog Output
Programming Example:
A typical transformer Load Tap Changer application with taps numbered 1 to 32,
2 neutral taps (7-1 and 7-2), with 9.5
o
per tap, presently set on tap “18” would be programmed
as follows:
OP 2 Operating mode = 17 OP 21 Degrees per tap = 9.5000 OP 27 Present tap = 18
OP 20 Number of taps = 33
OP 22 Number of neutrals = 2
OP 28 Load present tap
OP 23 Neutral start tap = 7