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RECLOSING RELAY
TYPE
ACRII
INTRODUCTION
The Type
ACRllB
relay
is
a
reclosing
relay
which
automatically
initiates
the
reclosing
Impulses
to a
circuit
breaker
which
has
been
tripped by
Its
protective
relay.
It
Is
basically
a timing device,
consisting
of a synchronous
motor
which
drives
a
gear
train
and a
cam
shaft with
resetspring
through
a
crown-gear
clutch with a magnetic clutch
release.
The
relay
contains a
series
at
cam-operated
switches,
an
auxiliary
unit and
an
interlocking unit .
The
cams
can be
arranged
to provide for an
immediate
Initial
reclosure
followed by
up
to
three
delayed
reclosures,
or
for
a delayed initial
re-
closure
followed by one
or
two additional delayed
reclosures.
The
reclosing
relay
resets
auto-
matically
a
short
interval
after
any
successful
reclosure,
or
from
Its lockout position following
a
successful
manual
reclosure.
Other
reclosing
cycles
are
also
possible
as
described
under AD-
JUSTMENTS.
The
ACRllC
relay
Is
similar
in construction
to
the
ACRllB
except
that
all
of the
adjustable
cams
are
singl.e ended. The
omission
of the double
ended
cams
permits
eliminating
the
definite
time
automatic
reset
feature
after
any
or
all
successful
t"eclosures.
Reset
is
accomplished by the
flat
ended
awl
after
successful
manual
reclosures.
The
.oller
actuated
switches "DEn-nGlII" and nJX"
are
set
as
outlined in the
text
for
the
ACRllB.
The
"RS" switch
setting
Is
made
as
required
In the
particular
application. The
Interanal
connection
diagram
Is
the
same
as
the
ACRllB.
The
ACRllE
is
similar
to the
ACRllB
except
that
It
has a
dual
rated
motor
ctrcult.
APPLICATION
The Type
ACR
reclosing
relay
is
suitable for
application whenever
It
Is
destred
to automatically
reclose
a
circuit
breaker
one
or
more
times
after
It
has
been
tripped
by
Its
protective
relay. When
Immediate
initial
reclosing
is
used, the
circuit
breaker
mechanism
should be provided with a
position
SWitch
or
latch-checking switch to
insure
that
the
mechanism
is
ready
to
close
the
breaker
before
the
closing
coil
Is
energized; and the
pro-
tective
relay
contacts
must
reopen
fast
enough to
prevent
retrlpplng
of the
ctrcult
breaker
following
Immediate
reclosure.
A D-C stepping
relay
Type
NLA
Is
available
to
provide
an
alarm
after
a specified number
at
reclosures
and a lockOut
after
a
spec
ifled number
of
subsequent
reclosures.
More specific information
relative
to
applica-
tion
Is
given in the section entitled APPLICATION
CONSIDERATIONS.
RATINGS
The driving motor
of
the Type
ACRll
relay
Is
available
for
operation on
a-c
only, and
Is
rated
continuously
at
the voltage and frequency indicated
on the nameplate.
The
auxiliary
units (interlocking unit 179E
anti-pump unit 119Z, and clutch
release
unit 179R\
can be furnished
for
use
on
eithera-cor'd-c
controi
supplies. The interlocking and clutch
release
units
are
suitable for
intermittent
duty only, but the
anti
-pump unit
Is
continuously
rated
at
the voltage
and frequency indicated on the nameplate.
CONTACTS
The
cam
operated switch
contacts
will make,
carry
and
interrupt
the following
currents.
VOLTS
INDUCTIVE NON-INDUCTIVE
ABC
-
GHl
RS
ABC
- GHl RS
24
d-c
6
2.4
10
3
48
d-c
1
0.6 1.5 0.7
125
d-c
0.2
0.2 0.2 0.2
250
d-c
0.1 0.1 0.1 0.1
All
cam
operated switches will
carry
30
amps
for
tripping duty.
The contacts
of the anti-pump unit 179Z and
the interlocking unit 179E will make
up
to
10
amperes
and
wUl
carry
1.0
ampere
continuously.
Its contact interruption
rating
Is shown
In
the follow-
ing tabulation:
VOLTS
INDUCTIVE
NON-INDUCTIVE
250 D-C
O.lOA
0.20A
125 D-C
0.3OA
0.7SA
48 D-C
1.20A
3.5OA
230 A-C
1.0 A 2.0 A
11S
A-C
2.0 A 4.0 A
rlt.,.
i""rucliolll do
IIOt
purport
to
cov.r
011
detail,
or
voriotiolll
in
equipment
IIOr
to
provide
for
.very pouible
conting.ncy
to
be
m.t
in
connection
witlt
i""ollolion,
operation
or
maintenonce. Sltould furtlt.,
information
be
delired
or
"'ould
porticular
problem, ari
..
wlticlt
are
IIOt
covered ",fficiently
for
tit. purclto_',
purpoMI,
tit. matt., "'ould
be
r.f.,red
to
tit. General
Electric
Compony.
3
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