Supplementary Instructions for
Mechanical Latch Attachment
for
Type
SJA
or SJO Contactor
Single or Dual
Trip,
360
Amp~re
I.
L.
16·200-35A
•
Fig.
1
Type
SJO
with Latch Attachment
APPLICATION
trip the latch arm - when energized - by pushing the
· ra:tch arm down (below the armature), allowing the con-
t11ctor
armature
to
move
into the open-contacts position.
The latch arm has a r0ller-bearing cam )ll'heel
on
the
end
'that
engages the armature
so·
that
..
friction
is
minimizec;I
and the trip action is fast.
The contactor coil and trip solenoid coils are Inter-
mittently rated and will burn-out if energized contin;
·uously,
there
are many possible operating schemes
and diagrams, and the installer should check the oper.
ation of the latch against the specified diagram
for.
the
specific application.
1.t
Is
recommended that the coils
be
automatically de-energized
by
auxiliary contacts on
the contactor itself, without depending
on
supplemen·
tary relays elsewpere. · .
· ·The latch sensitivity
is
adjustable.
If
unlatching occurs
accidentally from vibration
or
impact, the sensitivity
. should be decreased.
If
either unlatch solenoid fails to
trip the latch when rated solenoid voltage
is
.applied,
then the sensitivity should
be
increased. Refer
to
the
. ·seotiofr
on
MAINTENANCE.
' . .
',1-:·'-
·.
·
..
'
TABLE
I -
COIL
INRUSH
DATA
~
.Coll
Function
Rating
Volt~Amperes
Close
contactor
110-120
VAC
1300
Close
contactor
220-240
VAC
.
1400
Close
contactor
125
VDC
1500
Close
contactor
250
VDC
1600
Open
contactor
AC
225
·.·
Open
~ontactor
24
voe
·
600
Open
contactor
4896
voe
190
'
';
Open
contactor
125
VD.C
300
Open
contadtor
230
VDC
265
INSTALLATION
This industrial type control
is
designed
to
be
installed,
operated, and maintained
by
adequately trained ;per'
sonnel, with adequate supervision. These instructions
do not cover all details, variations,
;or
combinations, of
the equipment,
Its
storage, delivery, '>installation,
checkout, ·safe operation, dr maintenance. ·Care
must.
be
exercised
to,
comply with local,
st'ate,
and national
regulations, as well as safety practices, for this, class
of equipment.
WARNING:
ALL.
WORK
ON
THIS
..
CoNT:ACTOR
SHOULD
BE
DONE.
WITH
THE.
MAIN
DISCO.NNECT
DEVICE
OPEN.
AS
WITH
ANY
CONJACrOR
OF'THIS
VOLTAGE
CLASS,
THERE
IS
DAN~ER
OF
ELECTRO·
CUT
ION
AND/OR
SEVERE.
BURNS,
MAKE
CERTAIN
THAT
POWER
IS
OFF'
.
. I
Courtesy of NationalSwitchgear.com
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