MODEL G4572
2 HP 220V MAGNETIC
SWITCH
INSTRUCTIONS
220 Volt
Single-Phase
Power Source
Electrocution or
fire could occur if
this switch is not
installed or adjust-
ed by a qualified
electrician!
1L1
3L2
5L3 13NO
NO
53
TECO
Contactor TECO
CU-16 (220V Coil)
Ground
ON
NO
CU-
16
54
COLOR KEY
14NO
6T3
2T1
4T2
Bk
BLACK
Gn
GREEN
Rd
RED
YELLOW
TRIP IND.
M
A
O R
TEST
RESET
OFF
Thermal Overload
Relay TECO RHN-10K
(8.5–12.5A)
98 NO
95 NC
96 NC
97 NO
2T1
6T3
4T2
Figure 1. Model G4572 magnetic
2 HP 220V Motor
switch.
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 sudden 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.
OPERATION: 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 closed. 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.
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