Westinghouse MG-6 Installation, Operation & Maintenance Instructions Manual

c 1 0 N
TYPE MG-6 MULTI-CONTACT AUXILIARY RELAY
Before putting relays into service , remove
AuT
all bloc king 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 is designed for applications
where several indep endent circuits must be energized
or de-energized upon the operation of a single primary
relay contact, or where the cap acity of the primary
r��lay contact is inadequate for the energy required
in a control circuit .
relays may be used directly as primary relays. Since
the stationary contacts can readily b e reversed so as
to be suitable for either circuit opening or circuit
«
closing service (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 b e used.
In the usual application of the relay , the armature
resets when the operating coil is de-energized. How­
ever, the rel ay s may be supplied with a latching
mechanism which holds the armature in the operated
position until the l atch is tripped, eithsr
electrically.
An operating coil cutoff contact can be supplied
with the electric-reset type, where an intermittent
duty coil is required for faster than normal operation,
but where the operating coil circuit must
continuously. An operating coil, rated at 19% of sup­
ply rating may be applied, with a maximum duty of
10,000 operations. (e.g. 24 volt coil on 125 volt
circ uit.
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
..J II
possih/e contin[{encies which may arise during installation, operation, or maintenance, and all
details and I'(Jriatiom of this equipment do not purport to be covered by these instructions. If jiirther
infornwtion is desired hy purchaser regarding his particular installation, operation or maintenance of
his equip111ent. the local Westinghouse Electric Corporation representative should be contacted.
SUPERSEDES I.L. 41-75 3 .1 H , da_ted February 1973
�Denotes change from superseded issue.
INSTALLATION
INSTRUCTIONS
In c ertain applications these
-
the d e MG-6
relay
by hand or
be
energized
•
OPERATION
-t:
of the relay, as shown in Fig.
circuit is built up of u-shaped p unchings.
are slotted at the outer end of the lower leg to re­
«
ceive the copper lag loops used to obtain quiet oper-
The operating coil is mounted on this
at ion on ac.
leg of the punching s.
formance of the
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 upp er
l e g of the punching assembly is shaped so that the
lower end of the armature restraining spring can be
hooked over it.
The armature is made of high-silicon steel.
j ecting sections on the sides , ne ar the center, act as
knife-edge bearings and rest on suitably shaped sup­
sec
ports which are a p art of the moulded b ase.
attached to the lower leg of the electromagnet ex­
tends through a hole in the lower end of the armature,
and a stop-nut on the outer end of this stud is used
to limit and adjust the travel of the armature in the
de-energized direction.
will remain at any po sition in which it is placed
without additional locking me ans.
The upper end of the armature carries an adjust­
ing screw to which one end of the armature restrain­
ing spring is attached.
reset rel ay s , a l atch 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.
from the armature .
screw and the latch screw ( or set screw), there is a
third screw which when tightened applies pressure to
de
the threads of the former screws and effectively locks
them against turning.
The moving
moulded insulation which is fastened to the armature
•
Westinghouse
MA INTENANCE
1. L. 41-7 5 3 .lJ
The stationary iron
1.
In order to improve the per-
fac e area is
relay 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
EFFECTIVE SEPTEMBER 1975
These
Pro­
A stud
slightly
1)