3
Development status of motor protection?
Currently motor protection device has by past of machinery type
development for electronic type and intelligent type, may directly
display motor of current, and voltage, and temperature, parameter,
sensitivity high, reliability high, function more, debugging
convenient, protection action Hou fault type glance, both reduced has
motor of damaged, and great convenient has fault of judgment,
conducive to production site of fault processing and shortened
recovery production time.
In addition, the motor using air-gap
magnetic field motor eccentricity measurement technology, makes it
possible to line motor wear condition monitoring, through changes in
the eccentricity degree curve shows the motor trend to early detection
of bearing wear and walk in the circle, take the fault, such as the outer
circle, early detection, early treatment, avoid sweeping gun accidents.
Damages, great convenience a failure of judgement, and
troubleshooting of the production site and reduced recovery time.
4
Protection principle of selection?
Reasonable choice of motor protection devices, achieving both
motor overload ability into full play and free from damage, so as to
improve the reliability of electric drive system and the continuity of