GE IAC 12IAC80L-A Instructions

INSTRUCTIONS
This supplement in conjunction with GEH-1788 forms the instructions
for relay model 12IAC80L(-)A.
Relay model 12IAC80L{-)A consists of a single lAC type time overcurrent
unit with a seal-in unit mounted in
relay is similar to model 12IAC53A(-)A described in GEH-1788 except:
1) The internal connections are as shown in figure 1 of this
supplement.
2) The induction unit uses wound shading coils on the U-magnet to
provide torque control.
4)
3 and must be completed in order that there be a phase displace­
ment in flux to rotate the disk.
is completed, torque can be developed on the induction disk and
the unit will operate on overcurrent.
is open, the unit will not operate at current levels up to 20 times
tap value.
The time current curves, burdens and ratings of this relay are as given
in GEH-1788 for model
Theee ln1truction1 do
nor to provide for every pollible contingency to
operation or ••intenance.
e
probl ariee which are not covered •ufficiently for
..
�attar 1hould be referred to the General Electric to.pany.
POWER SYSTEMS MANAGEMENT DEPARTMENT
GENERAL
TIME OVERCURRENT RELAY
TYPE IAC
MODEL 12IAC80L(-}A
INTRODUCTION
DESCRIPTION
small single ended
a
This control circuit (connected to studs
12IAC53A(-)A.
not purport to cover all details or variatlone
be
Should f urther infor�� a tion be de1ired or 1hould partlcw1ar
.
ELECTRIC
GEK-27870
Insert Booklet- GEH-1788
(Sl)
When the shading coil circuit
When the shading coil circuit
in equi.-ent
inatallatlon,
11et in connection with
the
purcha1er•s IIU�Iel, the
case. This