Lucent Technologies Lineage
®
2000 ECS-6 Controller J85501D-1
2 - 12 Product Description
Issue 6 August 1998
the shunt in any Lineage
®
2000 battery plant is a 0 to 50 mV dc
voltage proportional to the load current. The controller may also
be used in a plant that is equipped with other than a 50 mV shunt,
e.g., 100 mV, as long as the shunt is located in the distribution
return bus.
The ammeter scale for the particular plant shunt size is selected
by DIP switches on the 113A2. Scales are provided for the most
common shunt ratings and range from 1 ampere per millivolt to
16 amperes per millivolt (See Section 4, “Hardware Setup” for
details.)
Front Panel Test
Jacks
Test points are provided on the front panel so that the plant
voltage may be checked with the user's meter. The accuracy of
the LCD voltmeter on the front panel, at 0.05%, is better than
that available with most hand-held meters. The test points are
current-limited against accidental short-circuits by test probes.
Rectifier
Sequence
Control Interface
When the battery plant's ac power is backed up by an engine
alternator of limited capacity, it is often necessary to control the
number of rectifiers on line during a commercial ac outage. To
avoid stalling the engine during start up or overloading it at
steady-state, it may be necessary to turn off rectifiers
temporarily until the engine comes up to speed. This operation
of turning rectifiers off and back on during engine start up is
called Rectifier Sequence Control.
The ECS-6 controller may be connected to the four output
signals TR1, TR2, TR3, and TR4 provided by a Rectifier
Sequence Controller, such as NJ00630A1. These signals are
used to turn off rectifiers or groups of rectifiers.
Since sequence control is typically part of the ac engine system
rather than part of the dc battery plant system, the Rectifier
Sequence Controller is often outside the battery plant and
interfaces with the rectifiers through the battery plant controller.
The controller equipped with CP2 is capable of Rectifier
Sequence Control without an external sequence controller.
However, a signal to indicate that the plant is being powered by
the reserve system is still required.
The TR signal input to the controller may also be used for other
on/off control of rectifiers by an external control device.
