Lucent Technologies Lineage
®
2000 ECS-12U Controller J85501E-2
2 - 18 Product Description Issue 3 July 1998
Spare Fuses The fuse board may also provide holders for three spare fuses.
These fuses are labeled F22, F23, and F24. The holders come
equipped from the factory with 1-1/3 ampere-rated fuses. These
may be replaced with any ampere-rating fuses the customer
prefers for a particular application. Note that these fuse holders
are not connected to plant power or to the controller's alarm
circuitry.
Low Voltage
Detection for
Disconnect and
Reconnect
Contactor
The List 3 controller also includes a low voltage
disconnect/reconnect circuit as part of the fuse board. The List 3
is intended for use with the J85500S-1 and J85500T-1 Battery
Plants that have an optional LVD contactor.
The LVD/Fuse board provides sensing of the plant voltage for
use in controlling the Low Voltage Disconnect/Reconnect
Contactor in the battery plant. Although the actual Contactor is
an optional feature of the battery plant, the sensing circuits and
associated alarms are standard on all List 3 controllers. There are
two sense circuits on the LVD/Fuse board, configured in a
redundant fashion so that both circuits must sense a low voltage
before opening the Contactor. P505.1 and P505.2 provide the
user with a choice of two disconnect voltages. Placing jumpers
across pins 1 and 2 of 505.1 and 505.2 provides a disconnect
voltage of 42.5V, while placing the jumpers across pins 2 and 3
provides a disconnect voltage of 40.5V.
CAUTION The two jumpers must be set for the same threshold. Each
jumper sets the threshold for one of the two redundant sense
circuits. If the jumpers are set for different thresholds, the
lower threshold will actually control the Contactor since
both circuits must sense a low voltage before opening the
Contactor.
Information on the state of the detection circuits is provided via
two LEDs, connections to the controller’s Minor Fuse Alarm
circuits, and a Form-C contact closure available on the 113B.
When one or both of the detection circuits senses a low voltage,
or if one of the detection circuits fails such that it appears to have
detected a low voltage, the yellow LVD/FAIL LED will
illuminate and a Minor Fuse Alarm will be sent to the controller.
If the battery plant is equipped with the LVD
Disconnect/Reconnect Contactor, the red LVD/OPEN”LED
will illuminate when the Contactor is open either during normal
operation when a low voltage is detected, or in the unlikely event
of a Contactor failure. A Form C contact closure on the 113B
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