
6.4
Tap settings
6.4.1
Tap information
The TCC300 Digital Tapchanger Control tap position information applies to many
different configurations of tapchangers, for example, ±16 taps, 1...17 taps, ±10 taps, 1...33
taps, and so on. Two configuration points, Lowest Tap and Highest Tap, are assigned to
allow the user to select the range of a specific tap changer. The Highest Tap range is 0...33
taps, and the Lowest Tap range is –33...+29 taps. The user is able to program the control
to select the method of tap position knowledge or to disable this feature.
Table 62:
Tap Information Screen Selections
Screen resolutions
Tap position knowledge
method
Current range
Screens disabled
XFMR EXTERNAL #3
Current Loop
0...1 mA
Primary & Secondary
Source Voltage
XFMR EXTERNAL #2
Current Loop
4...20 mA
Primary & Secondary
Source Voltage
XFMR EXTERNAL #1
Current Loop
0...1; 0...2; or ±1 mA
Primary & Secondary
Source Voltage
REG EXTERNAL #3
Resistor Divider
N/A
None
REG EXTERNAL #2
Current Loop
4...20 mA
None
REG EXTERNAL #1
Current Loop
0...1; 0...2; or ±1 mA
None
INTERNAL
KEEPTRACK
Motor Direct Drive
KeepTrack
N/A
None
CONTACT KT 1R1L
Direct Contact
KeepTrack
N/A
Primary & Secondary
Source Voltage
CONTACT KT 1N
Direct Contact
KeepTrack
N/A
Primary & Secondary
Source Voltage
DISABLE
None
None
Primary & Secondary
Source Voltage, Tap
Position
6.4.1.1
Load tapchanger (LTC) positive tap position knowledge
With the advent of Smart Grid initiatives, Utility SCADA systems require positive tap
position information for Real Time Power Flow Calculations that are required for proper
implementation of their Integrated Volt VAr Management (IVVM) programs. This
section reviews several different methods that can be used to provide positive tap position
knowledge in LTC transformer applications. The following positive tap position
knowledge methods will be reviewed that can be applied in new and retrofit applications
depending on installed equipment.
1VAC388793-MB A
Section 6
Configuration
TCC300
445
User Manual
Summary of Contents for TCC300
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