
Lucent Technologies Lineage
®
2000 ECS-6U Controller J85501E-1
4 - 22 Installation and Setup
Issue 4 August 1998
Shunt Isolator
Circuit
When a plant whose shunt is located in the “Batt” lead is
connected to the ECS-6U, or the shunt size is not compatible
with the ECS-6U (i.e., not listed in Table 4-C), the AKC1B
Shunt Isolator Circuit must be used. This circuit, along with the
mounting hardware, 846903730 wire set, and four 403929219
shunt fuses (two are spares), is provided per J85501E-2 List 6
field installation kit when mounted in a frame with 24-5/16 inch
mounting centers or List 7 when mounted in a frame with
22-5/16 inch mounting centers. Figure 4-15 shows the
installation of the circuit.
A shunt isolator is required when retrofitting the originating bay
of 152A-155A power plants. A 259A terminal strip and
associated mounting is also included with this kit to provide a
common fuse alarm (FAJ) connection point for distribution
panels and the controller. Mount this terminal strip in the
originating bay framework. Refer to wiring drawing
T-82603-31, Figure H19.
The 846903730 wire set consists of a 5-foot cable with fused
shunt leads for bolting directly to the shunt, an isolated shunt
signal to the BAD8 Fuse Alarm Board at P506-4 and -3, and
power for the circuit from the lower backplane connector J707
on the controller. If the wire set is not long enough, splice
22-gauge wire as required.
When the P707 and P1 plugs of the 846903730 wire set are
connected, the green LED of the AKC1B should activate,
indicating proper power polarity to the AKC1B. If the red LED
activates, polarity into P1-1 and P1-2 has been reversed. Reverse
the faston connectors of the yellow and violet wires of the wire
set.
The DIP switch settings required to configure the AKC1B board
are listed in Tables 4-G and 4-H. When the AKC1B isolator
circuit is used, the DIP switch settings on CP1 (SW109) and
CP2 (SW202) must be reconfigured to conform to these
tables for the type and size of shunt required.
For non-standard shunts that do not match the settings in Tables
4-G and 4-H, use this recommended procedure:
1. Set the DIP switches on Table 4-H to the next higher shunt
current rating.