
8.11
Control power backup input connection
The Control Power Backup Input option is designed to sustain communication port
operation in the event of the loss of AC control power. In the event of a loss of AC input
power to the control, the option permits uninterrupted operation of the control by
sup12 Vdc to the control. In addition, the control retains functionality with the
exception of the actual operation of the tapchanger mechanism.
When the AC input voltage drops below approximately 85 Vrms, the Control Power
Backup Input will activate and all automatic tapchange operations will then be suspended.
If Motor Power is available, manual tapchanges may be initiated.
When the control is being powered from the Control Power Backup Input, it will continue
to read any input voltage present.
The control retains full functionality, and if the control's Motor Power remains energized
then Raise and Lower commands are possible. Fiber-Optic port operation is maintained.
All communication ports, data-logging, status monitoring, configuration, and setpoint
capability are also maintained.
The Control Power Backup Input option is installed at the factory, and is wired through the
two-pin connector located on the top rear of the control.
ABB offers two Control Power Backup supplies for use with the TCC300 when the
Control Power Backup Input option is purchased. The M
‑
2026 AC-DC Control Power
Backup Supply is a fused, surge protected and reverse polarity protected AC
‑
DC Control
Power Supply that accepts an AC or DC input (21 to 32, 42 to 60 and 105 to 145 V) and
outputs reg12 Vdc at up to 1.5 Amp.
The M
‑
2027 Control Power Backup Supply - AC Only is a fused and surge protected
Control Power Backup Supply that will accept an AC input range of 105 to 140 Vac, 50/60
Hz and 12 Vdc to 1 A.
Both the M
‑
2026 and M
‑
2027 are housed in non-weathertight enclosures and are
equipped with screw terminal blocks for both input and output connections.
Use of Non-ABB converters to p12 V to the Control Power
Backup Input may compromise system integrity due to a lack of adequate
protection of the power converter. For reliability of the TCC300, the
power converter must meet certain requirements.
Section 8
1VAC388793-MB A
Installation
570
TCC300
User Manual
Содержание TCC300
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