l、YZR.YZ. series motors for crane and metal-lurgical uses ,featured with large overload capacity and adequate mechanical strength ,are specially suitable for driving various types of crane and metallurgical mechineries or other similar equipment.
YZR series motors are wound rotors type,while YZseries motors are squirrelcage type.
2、The motors will operate normally under the following conditions:
(1) temperature of coolant not exceeding 40℃(for crane uses) or 60℃(for metallurgical uses).
(2) Altitude form sea-level not exceeding 1000m.
(3) Frequent and significant mechanical vibration and shocks.
(4) Frequent starting ,braking(electrical or mechanical) or reversing.
3. The rated frequency of the motor is 50Hz and rated voltage is 380V.
4. Connection : for motors with power of 132KW or below, Y type connection;T others: △ tye connection. Motors using Y connection can also add zero wire.
5. Type condification.

 table 1

7. For YZ series motors ,when working with basic dult type the guaranteed values of the ratio of the maximum torque and the locked rotor torque to the rated torque under rated voltage are given in table 2.

table 2

8. For the YZR series motors ,when working with basic duty type ,the guaranteed values of the ratio of the maximum torque to the rated torque under rated voltage are given in table 3.

table 3

9. The moment of inertia Jm ,open-circuit voltage ,no-load current and weight of motor are shown in table 4.

table 4