Power Tec 71443 User manual

MODEL NO. 71443INSTRUCTION SHEET
Magnetic Switch (220–240 V)
QUESTION...
1•847•780•6120
WARNING
Read and understand the instructions before
installing this switch.
SPECIFICATIONS
Voltage Rating...................220–240 V
Rated Current Amperage ............18–26 A
Phase .................................1
Horsepower.............................3
CSA Approved
IMPORTANT: This magnetic switch toggles
a motor ON and OFF. If the motor operating
temperature gradually increases due to heavy
workloads, the switch helps provide thermal
overload protection to the motor.
NOTE: The thermal overload relay inside is
not designed to cut power in the event of a
sudden motor overload or stall. The magnetic
switch MUST be connected to a properly sized
power supply circuit with a correct fuse or circuit
breaker to help protect the motor against sudden
motor overload or stall.
OPERATION: The green push button switch
allows current to go to the magnetic coil which
pulls the contactor closed. Main current now
passes through the thermal overload relay and
then to the motor. This relay monitors motor
current draw. If the motor begins to overheat,
this relay breaks the magnetic field, which opens
the contactor and cuts current to the motor. The
red push button breaks the magnetic field, which
opens the contactor and disconnects the current
to the motor.
SAFETY INSTRUCTIONS
WARNING
To reduce risk of serious burns, electrocution or
death when installing this switch:
-This switch is to be used to replace an
existing machine switch with the same
physical configuration, equivalent electrical
specifications and ratings.
-The installation of this switch MUST be
performed by an electrician or qualified
service personnel in accordance with all
national and local electrical codes.
-This switch MUST be installed on
an electrical circuit with a verified
machine ground, correct voltage and
adequate fuse protection.
-Before installing the switch, TURN OFF
AND COMPLETELY DISCONNECT ALL
POWER SOURCES to the machine.
-DO NOT use this switch in damp or wet
locations. DO NOT use this switch near
explosive fumes or flammable liquids. It is
not sealed or rated for these environments.
SAVE ALL WARNINGS AND INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING
-This switch MUST be installed on
an electrical circuit with a verified
machine ground. In the event of certain
malfunctions or breakdowns the grounding
reduces the risk of electric shock by
providing a path of least resistance for
electric current.
To Install
See the Wiring Diagram to properly install
the switch.

Southern Technologies, LLC
Waukegan, IL 60087
Put these instructions and the original sales invoice in a safe,
dry place for future reference.
Visit us on the web at powertecproducts.com
19-0604
WIRING DIAGRAM
3 HP 220/240 V
Motor
Thermal Relay
Overload Amp
Adjustment
Dial: Turn this
dial to the motor
manufacturer's
thermal overload
amp setting
specification.
Typically this
setting is 100-110%
of what is listed on
the motor data plate
as the MAX amp
load.
IMPORTANT:
Turning this dial
has no effect on
increasing motor
horsepower.
Turning this dial
to a too high amp
setting could
cause the motor
to overheat and
become damaged
before the
relay trips.
Reset Button/OFF
Button
Reset Operation:
If the thermal relay
has tripped, push this
button to reset the
thermal relay.
OFF Operation:
If the motor is
operating normally,
this button will also
cut the current going
to the magnetic field
coil, which opens the
contactor and kills
power to the motor.
Manual
Contactor
Override Lug:
When pushed,
the contactor
is manually
closed for
troubleshooting
purposes only.
ON Button: When pushed, power is sent to the
magnetic field coil and the contactor closes and
sends power to the motor.
Manual Trip Test Lever: If the thermal
relay function is in question, use a wooden
stick or dowel to slide the brown lever to the
right. If the motor shuts off, the thermal relay
has tripped and is functional. If the motor
keeps running, the themal relay needs to
be replaced.
220/240 1-Phase
Power Source