|
Nameplate or Brake Horsepower |
Standard Fan Motor Efficiency |
NEMA* High Efficiency |
Premium Efficiency |
|
1/20 |
40% |
... |
... |
|
1/12 |
49% |
... |
... |
|
1/8 |
55% |
... |
... |
|
1/6 |
60% |
... |
... |
|
1/4 |
64% |
... |
... |
|
1/3 |
66% |
... |
... |
|
1/2 |
70% |
76.0% |
80.0% |
|
3/4 |
72% |
77.0% |
84.0% |
|
NOTE: For default drive efficiencies, see Nonresidential ACM Reference Manual | |||
|
*NEMA - Proposed standard using test procedures. | |||
|
Minimum NEMA efficiency as specified by test IEEE 112b Rating Method. | |||
|
|
Open Motors |
Enclosed Motors | ||||||
|
Motor Horsepower |
2 pole 3600 rpm |
4 pole 1800 rpm |
6 pole 1200 rpm |
8 pole 900 rpm |
2 pole 3600 rpm |
4 pole 1800 rpm |
6 pole 1200 rpm |
8 pole 900 rpm |
|
1 |
77.0 |
85.5 |
82.5 |
74.0 |
77.0 |
85.5 |
82.5 |
74.0 |
|
1.5 |
84.0 |
86.5 |
86.5 |
75.5 |
84.0 |
86.5 |
87.5 |
77.0 |
|
2 |
85.5 |
86.5 |
87.5 |
85.5 |
85.5 |
86.5 |
88.5 |
82.5 |
|
3 |
85.5 |
89.5 |
88.5 |
86.5 |
86.5 |
89.5 |
89.5 |
84.0 |
|
5 |
86.5 |
89.5 |
89.5 |
87.5 |
88.5 |
89.5 |
89.5 |
85.5 |
|
7.5 |
88.5 |
91.0 |
90.2 |
88.5 |
89.5 |
91.7 |
91.0 |
85.5 |
|
10 |
89.5 |
91.7 |
91.7 |
89.5 |
90.2 |
91.7 |
91.0 |
88.5 |
|
15 |
90.2 |
93.0 |
91.7 |
89.5 |
91.0 |
92.4 |
91.7 |
88.5 |
|
20 |
91.0 |
93.0 |
92.4 |
90.2 |
91.0 |
93.0 |
91.7 |
89.5 |
|
25 |
91.7 |
93.6 |
93.0 |
90.2 |
91.7 |
93.6 |
93.0 |
89.5 |
|
30 |
91.7 |
94.1 |
93.6 |
91.0 |
91.7 |
93.6 |
93.0 |
91.0 |
|
40 |
92.4 |
94.1 |
94.1 |
91.0 |
92.4 |
94.1 |
94.1 |
91.0 |
|
50 |
93.0 |
94.5 |
94.1 |
91.7 |
93.0 |
94.5 |
94.1 |
91.7 |
|
60 |
93.6 |
95.0 |
94.5 |
92.4 |
93.6 |
95.0 |
94.5 |
91.7 |
|
75 |
93.6 |
95.0 |
94.5 |
93.6 |
93.6 |
95.4 |
94.5 |
93.0 |
|
100 |
93.6 |
95.4 |
95.0 |
93.6 |
94.1 |
95.4 |
95.0 |
93.0 |
|
125 |
94.1 |
95.4 |
95.0 |
93.6 |
95.0 |
95.4 |
95.0 |
93.6 |
|
150 |
94.1 |
95.8 |
95.4 |
93.6 |
95.0 |
95.8 |
95.8 |
93.6 |
|
200 |
95.0 |
95.8 |
95.4 |
93.6 |
95.4 |
96.2 |
95.8 |
94.1 |
|
250 |
95.0 |
95.8 |
95.4 |
94.5 |
95.8 |
96.2 |
95.8 |
94.5 |
|
300 |
95.4 |
95.8 |
95.4 |
|
95.8 |
96.2 |
95.8 |
|
|
350 |
95.4 |
95.8 |
95.4 |
|
95.8 |
96.2 |
95.8 |
— |
|
400 |
95.8 |
95.8 |
95.8 |
|
95.8 |
96.2 |
95.8 |
|
|
450 |
95.8 |
96.2 |
96.2 |
|
95.8 |
96.2 |
95.8 |
|
|
500 |
95.8 |
96.2 |
96.2 |
|
95.8 |
96.2 |
95.8 |
|