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TYPE MG-6 MULTI-CONTACT AUXILIARY RELAY
C A U T I O N B efore putting relays into service, remove
all blocking which may have been inserted for the
purpose of securing the parts during shipment , make
sure that all moving parts operate freely, inspect the
contacts to see that they are clean and close prop
erly , and operate the relay to check the setting s and
electrical connections.
A P P L I C A T I O N
The type MG-6 relay i s designed for applications
where several independent circuits must be energized
or de-energized upon the operation of a single primary
relay contact, or where the c apacity of the primary
relay contact is inadequate for the energy required
in a control circuit.
relays may be used directly as primary relays. Sinc e
the stationary contacts can readily be reversed so as
to be suitable for either circuit opening or circuit
-K
closing servic e (although a slight increase in spring
tension may be required on
"ADJUSTMENTS AND MAINTENANCE " ) it is un
necessary to predetermine the arrangements of the
circuits for which the relay is to be used.
In the usual application of the rel ay , the armature
resets when the operating coil is de-energized. How
ever, the relays may be supplied with a latching
mechanism which holds the armature in the operated
position until the latch is tripped, eith9r by hand or
electrically.
An operating coil cutoff contact can be supplied
with the electric-reset type , where an i ntermi ttent
duty coil is required for faster than normal operation,
but where the operating coil circuit must be energized
continuously. An operating coil, r ated
ply rating may be applied, with
1 0 , 000
operations. (e . g .
ci rcuit.
C O N S T R U C T I O N A N D O P E R A T I O N
The operating electromagnet is at the lower end
S U P E RS E D E S I . L . 4 1 -753 . 1 H , dated F e b r uary 1973
*D e n otes c h a n g e from s u perseded i s s u e .
INSTALLATION
INSTRUCTIONS
In c ertain applications these
the
de
MG-6 re lay - see
at
1 9%
of sup
a
maximum duty of
24
1 25
v o lt coi l o n
volt
•
OPERATION
ote
of the relay, as shown in Fig. 1. The stationary iron
circuit is built up of U-shaped punchings.
are slotted at the outer end of the lower leg to re
-K
ceive the copper lag loops used to obtain quiet oper-
The operating coil is mounted on this
ation
on
a c .
leg of the punching s.
formance of the
re lay
increased by me ans of an iron plate.
assembled at the end of the coil and the corne rs of
the lamination side plates are bent outward , serving
to hold the plate in place. The inner end of the upper
leg of the punching assembly is shaped
lower end of the armature restraining spring can be
hooked over it.
The armature is made of high-silicon steel. Pro
j ecting sections on the sides, near the center, act as
knife-edge bearings and rest on suitably shap e d sup
ports which are a part of the moulded bas e .
attached to the lower leg of the electromagnet ex
tends through a hole in the lower end of the armature ,
a nd a stop-nut o n the outer end of this stud i s used
to limit and adjust the travel of the armature in the
de-energized direction.
will remain at any position in which it is placed
without additional locking me ans.
The upper end of the armature carries an adj ust
ing screw to which one end of the armature restrain
ing spring is attached.
reset relays , a latch screw is mounted at the ex
treme end of the armature.
this screw is replaced by a set screw which serves
to separate the locking plate ( see Fi g . 1) slightly
from the armature.
screw and the latch screw ( or set screw), there is a
third screw which when tightened applies pressure to
the threads of the former screws and effectively locks
de
them against turning.
The
moving
moulded insulation which is fastened to the armature
•
MAINTENANCE
Westinghouse
I . L . 4 1-753 . 1 J
so
In order to improve the per-
face area is
on
de ,
the
pole
This plate is
The special stop nut used
In the hand or electrically
In the self-reset relays
Between the spring adjusting
contact
fingers
are
mounted on
EF F E C T I V E SE P T E M B E R 1975
These
that the
A stud
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