Power Tec 71442 User manual

MODEL NO. 71442INSTRUCTION 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 .............8–12 A
Phase .................................3
Horsepower.............................3
UL Approved
IMPORTANT: This magnetic switch toggles
a motor ON and OFF. If the motor operating
temperature gradually increases due to heavy
workloads or a phase loss is detected, the switch
provides protection to the motor.
NOTE: The thermal overload/phase loss
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/phase
loss relay and then to the motor. This relay
monitors motor current draw. If the motor begins
to overheat or a phase loss is detected, the
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/phase loss
relay has tripped, push
this button to reset the
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/
phase loss 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 3-Phase
Power Source