Current, Phase, Thermistor, & Motor Rotation Monitoring Relays
Motor Rotation Monitors (Bulletin 819)
The MachineAlert family of dedicated
function electronic motor protection relays
offers state-of-the-art supplementary
protective functions that are easily added
and applied to motor control circuits. A full
range of products exists to allow selective
addition of motor protective enhancing
functions to meet specific application
requirements. The MachineAlert relays are
an economical choice for protecting
equipment investments and minimizing
production downtime.
Protective Functions
Zero speed / Standstill monitoring
Frequency monitoring
Advantages
Microprocessor technology
provides highly accurate and
repeatable protection
Built-in LCD and keypad afford
a precise, digital setting
Wide adjustment ranges allow for
application flexibility
Zero speed monitoring through evaluation of
the feedback voltage of a decelerating motor
Type E1 version also offers standstill
monitoring by means of a pulse generator,
tachometer, etc. (frequency monitoring for
signals of any curve form in the range of
16 ... 100Vp-p)
