3.
If the relay should fail, replace it with a new one,
since no adjustment is possible.
SWITCH OR RELAY REPLACEMENT
TO REASSEMBLE RELAY
The relay (see Fig. 3) used in Form G2 motors
1.
Connect the coil wires of the new relay to the
for cutting-in and -out of the start winding requires no
stator pick-up coil wires.
field adjustment. A non-position sensitive, low-potential
2.
Replace the relay in the shell, making certain
device, it operates from a sensing coil, wound on the
that connections are properly placed ii, the cavities of the
stator core in the same axis as the start winding (see Fig.
relay housing and that the insulation strip is in position
between the relay and the shell.
Voltage is induced into the coil from the start
winding. This voltage causes current to flow through the
SWITCH SETTING
magnet coil in the relay assembly, activating the relay
armature, and thereby removing the start winding from
The starting switch on G2 motors has only one
the line. When the motor circuit is opened, the relay
movable arm and wear pad compared to previous
armature returns to the start position.
motors with two arms and pads. This switch arm is
The relay has a built-in cam which mechanically
operated by the centrifugal mechanism to open and
separates the contacts, relieving any tendency for
close the contacts.
contacts to stick or weld together.
For proper switch setting, the flat back of the
spring must be 1.03/1.01 inches from the edge of the
TO REMOVE RELAY
shell (see Fig 5). The switch is designed to virtually
eliminate any need for adjustment. If adjustment is
1.
The relay may be removed by sliding it out the
necessary, adjust support bracket so that the back side
end of the shell.
of terminal board is .730/.720 inches from end of shell.
CAUTION: Do not break wires coming from the pick-
up coil.
TO REMOVE SWITCH
2.
After the relay is removed from the shell, wire
connections from the stator pick-up coil should be cut
1.
Disconnect switch from two brackets in shell and
close to the relay assembly, leaving all wire possible
remove.
coming from the pick-up coil.
2.
Remove internal leads with quick-connects from
terminal board.
TO REASSEMBLE SWITCH
1.
Reconnect internal leads to back of terminal
board and fasten terminal board to shell with the two
clamps.
2.
A recess in the perimeter of the oil well cover
(see Fig. 7) provides electrical clearance for the switch
and allows the switch arm and wear pad to move freely.
Fig. 3. Motor relay
Fig. 5. Switch located in shell
Fig. 4. Motor relay schematic
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