There are eight types of duty type for these series motors, S2,S3,S4,S5,S6,S7,S8 and S9. The basic duty type is S3－40% (duty type is S3, cyclic duration factor is 40%, each cyclic is 10min). The following duty types are most useful to these series motors. 1．Shorttime duty type (S2) Operation of constant load during a given time, less than that required to reach thermal equilibrium, followed by a rest and deenergized period of sufficient duration to reestablish machine temperature within 2 deg K of the coolant. 2. Intermittent periodic duty type (S3) A sequence of identical duty cycles, each including a period of operation at constant load and a rest and deenergized period but the operation period are so short that it is not sufficient for the machine to reach thermal equilibrium In this duty type, the cycle is such that the starting current does not significantly affect the temperature rise. 3. Intermittent periodic duty type with starting (S4) A sequence of identical duty cycles, each including a significant period of starting, a period of operation of constant load and a rest and deenergized period, but the operation period are so short that it is not sufficient for the machine to reach thermal equilibrium. 4. Intermittent periodic duty type with electric braking (S5) A sequence of identical duty cycles, each consisting of a period of starting, a period of operation at constant load and a rest and deenergized period, but the operation period are so short that it is not sufficient for the machine to reach thermal equilibrium. 5. The motor will operate satisfactorily under following conditions: (1) Ambient temperature not exceeding 40℃ (for crane uses) or 60℃ (for metallurgical uses). (2) Not above sealevel 1000m. (3) Frequent and significant mechanical vibration and shocks. (4) Frequent starting, braking (electrical or mechanical) or reversing. 6. The rated frequency of the motor is 50Hz and rated voltage is 380V. 7. Connection: The stator winding is connected in Y for 132kW and below and in △ for the rest. In Y with zero lead is also supplied. 8. Output and speed The range of rated output and, synchronous speed for the basic duty type (S340%) are shown in table 1.
table 1
Frame 
Synchronous speed 
1000 
750 
600 
r/min 
r/min 
r/min 
112M 
1.5 


132M1 
2.2 


M2 
3.7 


M1 
5.5 


160M2 
7.5 


L 
11 
7.5 

180L 
15 
11 

200L 
22 
15 

225M 
30 
22 

250M1 
37 
30 

M2 
45 
37 

280S 
55 
45 
37 
M 
75 
55 
45 
315S 

75 
55 
M 

90 
75 
M1 


90 
355L1 


110 
L2 


132 
400L1 


160 
L2 


200 
9. For YZ series motors, when working with basic duty 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
Rated Power(kw) 
Max. Torque TM/Rated Torque TN 
Block Torque/Rated Torque TN 
≤5.5 
2 
2 
＞5.5～11 
2.3 
2.3 
＞11 
2.5 
2.5 
10. 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
Rated Power(kw) 
Max. Torque TM/Rated Torque TN 
≤5.5 
2.3 
＞5.5～11 
2.5 
＞11 
2.8 
11. The moment of inertia Jm, opencircuit voltage, noload current and weight of motor are shown in Table 4.
Series 
Frame 
1000r/min 
750r/min 
600r/min 
Weight（Kg） 
Jm(kgm) 
Opencircuit rotor voltage （V） 
Noload Current （A） 
Jm(kgm) 
Opencircuit rotor voltage（V） 
Noload Current （A） 
Jm(kgm) 
Opencircuit rotor voltage（V） 
Noload Current （A） 
YZR 
112M 
0.03 
100 
2.7 






73.5 
132 
M1 
0.06 
132 
3.3 






97 
M2 
0.07 
185 
4.5 
108 
160 
M1 
0.12 
138 
7.5 






154 
M2 
0.15 
185 
10.5 



160 
L 
0.20 
250 
13 
0.20 
205 
11.9 
174 
180L 
0.39 
218 
18.8 
0.39 
172 
14.8 



230 
200L 
0.67 
200 
26.6 
0.67 
178 
19.7 



317 
225M 
0.84 
250 
32.3 
0.82 
232 
28.3 



390 
250 
M1 
1.52 
250 
27.2 
1.52 
272 
34.5 



512 
M2 
1.78 
290 
30.8 
1.79 
335 
43.7 
559 
280 
S 
2.35 
280 
38.4 
2.35 
305 
54.9 
3.58 
150 
49 
745 
M 
2.86 
370 
51.9 
2.86 
360 
55.9 
3.98 
172 
59 
840 
315 
S 



7.22 
302 
69.1 
7.22 
242 
74.2 
1026 
M 
8.68 
372 
64.6 
8.68 
325 
99.2 
1156 
355 
M 






14.32 
330 
97.3 
1520 
L1 
17.08 
388 
104.3 
1764 
L2 
19.18 
475 
147.1 
1810 
400 
L1 






24.52 
395 
111 
2400 
L2 
28.10 
460 
126 
2950 
YZ 
112M 
0.022 

2.5 






58 
132 
M1 
0.056 

3.1 






80 
M2 
0.062 
4.1 
91.5 
160 
M1 
0.114 

6.5 






118.5 
M2 
0.143 
9.3 


125 
L 
0.192 
11.2 
0.192 
11.1 
152 
180L 



0.352 

12.2 



205 
200L 



0.622 

18.3 



276 
225M 



0.820 

24.3 



347 
250M1 



1.432 

33 



462  