ABB TCC300, Руководство пользователя, Страница: 457 / 716

120 Vac
120 Vac
120 Vac
TCC300 Neutral
Input
Neutral contact
Aux Raise contact N.O.
Aux Relay 1
120 Vac
12 Vdc
wetting output
TCC300 VR1
Input
TCC300
Aux Relay 3
Aux Relay 4
Counter
Aux Relays
84R
84L
TCC300 VR2
Input
Aux Lower contact N.O.
Aux Relay 2
GUID-E4D72427-798E-4DDF-AAD6-0010DF55A581 V1 EN
Figure 357: 84R and 84L Aux Relays Available With Wetted 120 Vac
Example of Contact KeepTrack Method II – Using Neutral Contact Input
(with 84R/84L derived contacts)
In this example, an out
‑
of
‑
band condition occurs which causes the raise output from the
TCC300 to turn on or a manual operation is initiated. This will cause current to flow to the
motor and it will start a raise operation. The Aux Raise contact will close and then the
counter contact will close once the tap change is in process. When both of these contacts
close they will send directional feedback to the VR1 Input of the TCC300. This will tell
the control to increment the KeepTrack tap position by 1 tap.
If more than one tap raise is needed, the raise contact will stay closed and the Counter
contact is used to open the Aux Raise contact circuit removing the input to VR1 resulting
in the correct tap position being kept. When the unit no longer requires a raise output, the
raise output from the control will be turned off. If a lower operation is required, then the
same steps will occur except that Aux Lower contact will close and VR2 will be used.
As a verification scheme, a contact that closes when the tapchanger is on the neutral
position is also used as an input to the TCC300 control. When this Cam operated contact
closes, the control recalibrates the tap position to neutral if needed. As an example, if the
tap position is on 1R and a lower command is issued, the tapchanger moves to the neutral
position, and when the neutral contact closes, the control would recalibrate the tap
position if it was not already indicating neutral. If there are multiple neutral positions the
neutral contact would need to be closed on all the neutral positions.
1VAC388793-MB A
Section 6
Configuration
TCC300 451
User Manual