Easy to Install
Whether retrofitting an existing starter or installing
a new one, the MWH Series is easy to apply. Just
wire it in parallel to the magnetic starter’s line and
load connection, connect the necessary auxiliary
contacts and installation is complete.
Simple Adjustment
Output voltage is factory set to maintaina +5° to
10°C differential above ambient temperature. This
adjustment can be used to trim the control as
required for each application.
Self Protected
In addition to built-in fuse protection, the MWH
Series features an RC snubber circuit across the SCR
which protects it from any rapid rate of change in
the system voltage. A metal oxide varistor (MOV)
protects the unit against voltage spikes for reliable,
maintenance-free operation.
Fully Automatic Operation
Designed for fully automatic
operation, the MWH Series turns on
when the motor starter has turned
off. A built-in one minute timer
ensures that the motor magnetic
field has collapsed before it injects
DC power into the windings. When
the motor is restarted, the MWH
Series instantly turns off. No
operator interface is required... the
MWH Series is in control. |
|
Built-in Overload Sensing
The MWH Series had an optional
shutdown input that can be
connected to the N.O. auxiliary
contact on the motor starter’s
thermal overload relay. This will
disable the motor winding heater
control, preventing any additional
heating in the motor and allowing for
a faster motor cool down period. The
MWH Series then goes back on-line
after the overload relay is reset.
Ideal Alternative to Strip Heaters
Eliminate the cost and hassle of
installing strip heaters into your
motors. Simply wire up the MWH
Series to generate heat throughout
the motor stator windings. The heat
is dissipated evenly without the “hot
spots” caused by strip heaters.
Conduction of heat to the rotor,
bearings and shaft is also more
effective which means maximized
protection for the whole motor. |
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