ABB TCC300, Руководство пользователя, Страница: 456 / 716

TCC300 VR2
Input
TCC300 With Raise/Lower Contact KeepTrack
™
Feedback Inputs
TCC300
Neutral Input
Aux Raise contact N.O.
Switch 1
Switch 2
Cam
Cam
Switch 3 Cam
12 Vdc
wetting output
TCC300 VR1
Input
TCC300
Aux Lower contact N.O.
Neutral contact
GUID-46B88126-939F-458B-B5D8-B217B5802FEF V1 EN
Figure 356: Cam Switches Available
To implement the Contact KeepTrack Method II scheme with 84R and 84L derived
contacts, the KeepTrack method requires that four contacts be available and accessible in
the LTC to operate correctly.
• Aux Raise contact – This contact closes when the LTC takes a tap in the Raise
direction.
• Aux Lower contact – This contact closes when the LTC takes a tap in the Lower
direction.
• Counter contact – This contact is only required when using Aux Relays and must
close and open when the unit moves in either the Raise or Lower tap position.
• Neutral contact – This contact must close when the unit moves onto the Neutral tap
position and open when leaving it.
Auxiliary relays must be connected to the 84R and 84L contacts to provide dry contacts
for the Aux Raise and Aux Lower inputs. The Neutral and Counter contacts must be either
dry contacts or run through auxiliary relay contacts if wet. The Aux Raise and Aux Lower
contacts are connected in series with a dry Operations Counter contact. They are then
wetted with the TCC300’s internal 12 Vdc wetting voltage thereby providing the required
pulsed signals to properly increment tap position.
Section 6
1VAC388793-MB A
Configuration
450 TCC300
User Manual