ABB TCC300, Руководство пользователя, Страница: 452 / 716

•
Contact KeepTrack
™
•
Shaft Coupled KeepTrack
™
•
Resistor Divider KeepTrack
™
•
Motor Direct Drive KeepTrack
™
6.4.1.2
Contact KeepTrack
™
TCC300 Tapchanger Control Firmware Version D-0214V01.06.04 and above include the
1R/1L and 1N Contact KeepTrack methods. No cost firmware upgrades are available for
TCC300 Tapchanger Controls with earlier firmware versions.
There are two basic methods of Contact KeepTrack. The applicable method used depends
on whether a neutral contact is available that will always stay closed while the LTC is on
neutral, including multiple neutrals. Both methods require that up to four contacts be
available and accessible in the LTC to operate correctly.
The original TCC300 Voltage Reduction inputs are now used for the Aux Raise and Aux
Lower Inputs required by the Contact KeepTrack methods. Thus, the voltage reduction
function via physical contacts will not be available when Contact KeepTrack is selected,
but voltage reduction via communications is not affected.
The Raise and Lower Outputs from the control must agree with the operation of the
external Aux Raise and Aux Lower status contacts, and this must be maintained whether
the tapchanger is on the low or the high side of the transformer.
The Neutral input on the TCC300 is used for Tap Calibration in the Contact KeepTrack
method.
Contact KeepTrack Method I – Using 1R/1L Contact Input
If the neutral contact can’t be used, the following four Cam switch based dry contacts are
required.
• Aux Raise contact – This contact must close and open once between taps each time
the LTC takes a tap in only the Raise direction.
• Aux Lower contact – This contact must close and open once between taps each time
the LTC takes a tap in only the Lower direction.
• 1R contact – This contact must close when the tapchanger moves onto the 1 Raise tap
position and open when leaving it.
• 1L Contact – This contact must close when the tapchanger moves onto the 1 Lower
tap position and open when leaving it.
All four contacts must be either dry contacts or run through auxiliary relay contacts if wet.
The TCC300 control Voltage Reduction, Neutral, and Counter inputs require dry inputs
wetted internally with 12 Vdc.
Section 6
1VAC388793-MB A
Configuration
446 TCC300
User Manual