Grizzly Switch G4573 User Manual

MODEL G4573  
3 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  
CU-  
16  
54  
NO  
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  
(17–24A)  
98 NO  
95 NC  
96 NC  
97 NO  
2T1  
6T3  
4T2  
Figure 1. Model G4573 magnetic  
switch.  
3 HP 220V Motor  
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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