YZ & YZR series
three-phase asynchronous motors are new series products designed
unitedly in China for hoisters and metallurgical machines.
Compared with aeries JZ2 and JZR2, they have increased their
efficiency by 1.88%, output by 9.35%, and starting torque
slightly. The rating class and mounting dimensions comply
with the requirements of IEC72 standard, which are in favor of
the export trade and interchange in corresponding motor for the
The rated voltage
is 380V, the rated frequency is 50Hz, the basic duty type is S3,
the basic CDF is 40%, and the degree of protection by enclosure for
general environment is IP44, whereas that for metallurgical
environment is IP54. There are two kinds of insulation
class, that is, F and H. Class F is suitable for general
place where it is not more than 40°C an class H is suitable for
metallurgical environment where it is not more than 60°C. The
two kinds of motors are the same in parameters. There are
two cooling forms:IC410 for frame size ranging from 112 to 132
and IC411 for frame size ranging from 160 to 355. Star
connection is adopted in stator winding for those motors whose
powers are no more than 132 kw.
The rotor of
motor of series YZR is of wound type, whereas that of series YZ
is of squirrel cage type.
These motors are
suited for power drive for the hoisters and other similar
equipment, short time running duty type S2 or international
periodic duty type S3, starting and braking frequently, and the
equipment having obvious impact and vibration.