ABB TCC300, Руководство пользователя, Страница: 567 / 716

Source Voltage Input when mode of operation is set to "Regulate Reverse with Measured
Source Voltage".
Pin 2 Auxiliary Output
Available Auxiliary Output.
Pin 3 Auxiliary Input A1
When using the ΔVAR2 paralleling method, this input becomes the disable input for
ΔVAR2. This is used to keep the paralleled devices from running to their limits (max raise
or lower) if they have been un-paralleled for maintenance, etc.
Pins 4 and 5, Auxiliary Inputs - A2, A3
Available Auxiliary Inputs.
8.3 Non-sequential operation
Voltage applied through dry contacts to actuate non-sequential input,
voltage reduction inputs, counter contacts and neutral contacts must be
n12 Vdc obtained from Pin 10 of the TCC300 Tapchanger
Control. The use of 120 Vac will result in damage to the TCC300.
The operation of the control can be interrupted during tapchanger operation by applying
the "wetting" voltage of Pin 10 to Pin 17 (timer reset for non-sequential operation input)
on the control through an external contact. This causes the output to de-energize and
re
‑
initialize the time delay circuit when the reset signal is removed. This function can be
used to cause the LTC transformer, if so equipped, to wait for the unit to time out between
tapchanges.
8.4 Multi-step voltage reduction
Voltage applied through dry contacts to actuate non-sequential input,
voltage reduction inputs, counter contacts and neutral contacts must be
n12 Vdc obtained from Pin 10 of the TCC300 Tapchanger
Control. The use of 120 Vac will result in damage to the control.
On the TCC300 Tapchanger Control, Pin 9 and Pin 18 on connector P2 are used together
to provide up to three levels of voltage reduction. The external connections to achieve
these steps are shown in
Table 54 . Voltage reduction amounts are set within the TCC300
1VAC388793-MB A
Section 8
Installation
TCC300 561
User Manual