18
Modes 18 & 19: Base 0 Uni-polar Segmented These modes are used for LTC monitoring
when the lowest tap number is 0. There may be multiple neutral taps, which can be located
anywhere between the lowest and highest taps as long as they are grouped together in one
section. Mode 18 has a linear analog output that continuously varies with LTC shaft position.
Mode 19 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 “18” or “19”.
Figure 2.5 Base 0 Uni-polar Mode Analog Output
Programming Example:
A typical transformer Load Tap Changer application with taps numbered 0 to 16,
2 neutral taps, with 10.5
o
per tap, presently set on tap “9” would be programmed as follows:
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