motortronics MWH Series, Инструкция по установке и запуску

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Motortronics
3
Chapter 1 - General Information
1.1 Description
The Motortronics
MWH Series Solid State Motor Winding Heater is designed to prevent condensation build-up by
applying a low level
current to the AC motor windings when the motor is in the “off” condition. Motor windings are
susceptible to condensation formation each time the motor is stopped and the windings
’ temperature drops below
the dew point. Over a period of time this condensation build- up can degrade the insulation of the windings and
cause a short circuit when the motor is started. The same problem can occur when motors are not operated for an
extended period of time. This is especially true for damp and humid locations.
1.2 Features
Fully Automatic Operation
The Motortronics
MWH Series is designed for fully automatic operation. It turns on approximately one minute after
it receives power. When the motor is started the MWH is instantly turned off. The MWH turns back on
approximately one minute after the motor is turned off.
Overload Sensing
With the optional overload sensing, the MWH can be disabled automatically when a motor overload trip occurs.
The heater will go back on-line automatically after the overload is reset. This prevents additional motor heating
when a trip occurs providing faster motor cool down after a thermal overload trip condition.
LED Status Display
Indicator lights on the MWH inform the operator of the unit status. The POWER ON indicator shows that the power
is on and both of the MWH fuses are good. The ENABLE indicator shows that the motor is off and the MWH
control interlock is closed. The OUTPUT ON indicator shows that the MWH is supplying power to the motor
windings.
Designed for Safety
The
MWH Series is supplied in a compact open chassis design. Optional NEMA 1 enclosures are also available.
The front cover of the unit is fiber- glass insulation material which shields against accidental contact with electrically
live parts.