9400001-J1 Rev F
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4.3.12 Distribution Shunts
Each distribution panel has shunts (Figure 19) sized according to the breaker or fuse capacity.
A shunt multiplexer panel, located in the top of the bay, monitors the individual branch load currents within the
shelves of the individual distribution bay. The current measurements are sent to the controller, using CAN communi-
cations, for data logging and display.
Figure 19 — Distribution Shunts
4.3.13 Low Voltage Load Disconnect (LVLD) Option
The LVLD feature provides automatic disconnect of the system loads after a prolonged power failure when the bat-
teries have been fully discharged to a preset battery voltage. Contactors are installed in series with the load.
The system loads are automatically reconnected once AC is restored and battery voltage has risen above a preset
value. The controller is activated and is triggered by the battery voltage.
Each distribution panel can be ordered with its own disconnect contactor. The LVLD option can be configured at
time of order for group control. Contactor ratings are 2000A for TPL/bolt in breaker and 600A for plug-in bullet
panel.
Systems with LVLDs are equipped with a manual override switch. The purpose of this switch is to allow the user to
manually bypass the CXC HP control of the LVLDs during maintenance procedures or during software upgrades,
etc.
The controller will record an alarm when the switch is placed in the inhibit position.
4.3.14 Low Voltage Battery Disconnect (LVBD, purchased separately)
The LVBD contactors, installed in the external battery disconnect panels, are placed in series with the batteries to
provide automatic disconnect of the system batteries after a prolonged power failure when the batteries have been
fully discharged.
The batteries are automatically reconnected once AC is restored. Control is performed by the controller, and is trig-
gered by the battery voltage. Additional field wiring for this functionality is required; see battery disconnect manual
for details.
Shunts
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