Type Ecs Overcurrent Trip Device; Ecs Programmer Unit; Ecs Block Diagram; Ecs Sst - GE AKR Series Maintenance Manual Supplement

GEI-86134, Power Circuit Breokers
TYPE ECg OVERCURRENT TRIP DEVICE
The
ECS
is
a solid-state, direct-acting,
self-
powered
trip
device system
that
essentiatly dupli-
cates
SST
except
for
the
following:
1.
Programmer units
are
limited to combinations
of Long Time,
Short
Time
and Instantaneous
trip
elements
only.
The Ground Fault element
is
not
available.
2.
Fau1t
indicators
(trip targets) are not avail-
able.
3.
Phase
sensors
are not tapped. As listed in
Table
5,
each
sensor has only a
single
ampere
rating.
A different
sensor
is
available
for
each
of
the tabulated ampere
ratings,
which span the same
range as
SST.
4.
Neutral
s
enso
rs
ar
e
not r
equir
ed
becaus
e
ther
e
is
no Ground
Fault function.
In
all other respects the
ECS
trip
device system
operates
and can be treated identically
to
SST.
This
includes
circuitry,
size, construction,
com-
ponent
location, programmer unit
set
points, per-
formance characteristics,
operatin g r ange,
quality,
reliability
and
the
flux shift
trip
device.
Use the
same troubleshooting and
test
procedures for
single-phase, high current-low voltage tests
or
those employingthe TAK-TS1 Test
Set.
Thei Ground
Fault test procedures, of eourse,
do
not apply.
:::--
*
,3"
Fig.
29.
ECS
Programmer unit
PxocBtLMEjugrJ
"Ftux sHtFI"
TRIP
c0[.
24
Fig.
30.
ECS
Block diagram