BLACK
GREEN
RED
COLOR KEY
Bk
Gn
Rd
YELLOW
3L2 5L3
13
NO
2T1 4T2 6T3
14
NO
TEST
TRIP IND.
97 NO 98 NO 95 NC 96 NC
2T1 4T2 6T3
OR
54
NO
NO
53
ON
OFF RESET
3 HP 220V Motor
220 Volt
Single-Phase
Power Source
M
A
1L1
TECO
CU-
16
Ground
Contactor TECO
CU-16 (220V Coil)
Thermal Overload
Relay TECO RHN-10K
(17–24 A)
IMPORTANT: This magnetic switch toggles a motor ON and OFF, and helps provide thermal overload pro-
tection for the motor if the operating temperature gradually increases due to heavy work loads. The thermal
overload relay inside is not designed to cut power in the event of a sudd en motor overload or stall. To help
protect a motor from this type of overload, the power supply circuit must be properly sized for the full-load
current rating of the motor.
OPER ATIO N: When pushed, the green ON button on the outside cover of the magnetic switch allows cur-
rent to flow to the magnetic coil, which pulls the contactor clo sed. The main current then passes through
the thermal overload relay to the motor. If the motor begins to overheat, the relay breaks the magnetic field,
which opens the contactor and cuts current to the motor. The red OFF button manually breaks the magnetic
field, which opens the contactor and disconnects the current to the motor.
Figure 1. Model G4573 magnetic
switch.
Electroc ution or
fire could occur if
this switch is not
installed or adjust-
ed by a qualified
electrician!
MODEL G45733 HP 220V MAGNETIC SWITCH