
Motor Seal-in Failure Block
When Input Selection 1 is set to "Seal-In Input", the Motor Seal-in Failure Block feature
and the input to the Abnormal Tap Position alarm are enabled by default. The user may
choose to disable the Motor Seal-in Block feature. However, the input to the Abnormal
Tap Position alarm is always enabled when Motor Seal-in is selected.
Table 45:
Drag Hands
Item
Description
Drag Hands Lower
Displays the lowest tap since last reset. Selecting the
Reset check box and then selecting Save sends a
reset command to the control.
Drag Hands Raise
Displays the highest tap since last reset. Selecting
the Reset check box and then selecting Save sends
a reset command to the control.
Tap Statistics
The Tap Statistics Tap Wear feature provides the user with the capability to determine tap
wear in a regulator’s tap change mechanism. The Tap Statistics Tap Wear feature records
the accumulated primary current on each tap change using the measured Primary Current
just prior to moving off a tap. Primary current is calculated from measured Secondary
Load Current times the Primary Current Multiplier. The accumulated Primary Current for
each tap position is displayed on the Tap Statistics dialog screen which displays the
number of times the regulator has been on each tap. The Tap Statistics are stored in non-
volatile memory and will remain intact through power cycle and firmware update, as its
value is in its long term indication of mechanism wear.
The Tap Statistics can be downloaded to a CSV file and printed. Tap Statistics can also be
downloaded in CSV format to an SD card. The File name defaults to the serial number of
the unit but allows for user modification.
The Tap Statistics Tap Wear feature also includes two settings that are located in the
TCC600, Tap Settings dialog screen in the Tap Statistics section and in the HMI under the
Configuration/Tap Settings menu. Both settings are considered to generate a
Programmable Alarm output "Individual Tap Wear Alarm":
•
Maximum Tap Wear setting – The Maximum Tap Wear setting can be set from 1–
65534.
•
Individual Tap Wear Alarm setting – The Individual Tap Wear Alarm setting is a
percentage setting with a range from 1-200% and a default of 100%. This setting is
used in conjunction with the Maximum Tap Wear setting to determine when the
"Individual Tap Wear Alarm" is triggered. The Individual Tap Wear alarm will
trigger when the number of operations on any single tap exceeds the Individual Tap
Wear Alarm setting. This alarm also triggers SOE and OSC.
1VAC388793-MB A
Section 4
TCC600
TCC300
195
User Manual
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