Page 1
Customer :
Three-phase induction motor - Squirrel cage rotor
No.:
Date: 31-DEC-2012
TECHNICAL PROPOSAL
Product line :
Catalog Number : 01012ET3ECT256T-W22
List Price : $2,751
Notes:
Performed by: Checked:
W22 Cooling Tower Motors: NEMA Premium
Page 2
DATA SHEET
Three-phase induction motor - Squirrel cage rotor
Customer :
Product line :
Frame : 256T
Output : 10 HP
Frequency : 60 Hz
Poles : 6
Full load speed : 1175
Slip : 2.08 %
Voltage : 208-230/460 V
Rated current : 28.5-25.8/12.9 A
Locked rotor current : 168/83.9 A
Locked rotor current (Il/In) : 6.5
No-load current : 12.0/6.00 A
Full load torque : 44.1 lb.ft
Locked rotor torque : 230 %
Breakdown torque : 280 %
Design : B
Insulation class : F
Temperature rise : 80 K
Locked rotor time : 26 s (hot)
Service factor : 1.25
Duty cycle : S1
Ambient temperature : -20°C - +40°C
Altitude : 1000
Degree of Protection : IP55
Approximate weight : 289 lb
Moment of inertia : 4.4311 sq.ft.lb
Noise level : 59 dB(A)
W22 Cooling Tower Motors: NEMA Premium
No.:
Date: 31-DEC-2012
D.E. N.D.E. Load Power factor Efficiency (%)
Bearings 6309 C3 6209 C3 100% 0.80 91.0
Regreasing interval 20000 h 20000 h 75% 0.74 91.0
Grease amount 13 g 9 g 50% 0.63 90.2
Notes:
Performed by Checked
Page 3
PERFORMANCE CURVES RELATED TO RATED OUTPUT
Three-phase induction motor - Squirrel cage rotor
100
1.0 0.0
C
90
80
70
60
0.9
0.8
0.7
0.6
A
No.:
Date: 31-DEC-2012
C - Slip D - Current at 230V (A)
1.0
2.0
3.0
4.0
50
0.5
40
0.4
A - Efficiency (%)
B - Power factor
0 10 20 30 40 50 60 70 80 90 100 110 120 130
Customer :
Product line :
Frame : 256T
Output : 10 HP
Frequency : 60 Hz
Full load speed : 1175
Voltage : 208-230/460 V
Rated current : 28.5-25.8/12.9 A
Insulation class : F
B
D
Percent of rated output (%)
W22 Cooling Tower Motors: NEMA Premium
5.0
40
30
20
10
0
Locked rotor current (Il/In) : 6.5
Duty cycle : S1
Service factor : 1.25
Design : B
Locked rotor torque : 230 %
Breakdown torque : 280 %
Notes:
Performed by Checked
Page 4
5.0
CHARACTERISTIC CURVES RELATED TO SPEED
Three-phase induction motor - Squirrel cage rotor
No.:
Date: 31-DEC-2012
10.0
B - Current related to rated current (I/In)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
A - Torque related to rated torque (C/Cn)
Customer :
Product line :
0 10 20 30 40 50 60 70 80 90 100
9.0
8.0
7.0
B
6.0
A
5.0
4.0
3.0
2.0
1.0
0.0
Speed related to rated speed (%)
W22 Cooling Tower Motors: NEMA Premium
Frame : 256T
Output : 10 HP
Frequency : 60 Hz
Full load speed : 1175
Voltage : 208-230/460 V
Rated current : 28.5-25.8/12.9 A
Insulation class : F
Notes:
Performed by Checked
Locked rotor current (Il/In) : 6.5
Duty cycle : S1
Service factor : 1.25
Design : B
Locked rotor torque : 230 %
Breakdown torque : 280 %
Page 5
1 2 3 4 5 6 7 8
A
B
C
D
Notes:
E
2E
10.000
2F
10.000
N-W
4.000
D
F
6.250
HD
14.685
C
24.945
d2
A 4
J
2.539
K
2.559
ES
2.756
G
0.827
HF
6.565
LL
7.813
A
12.126
B
11.732
S
0.375
HB
3.061
HH
9.250
LM
7.482
P
12.480
BA
4.250
R
1.406
O
12.598
HK
3.987
AA
NPT 1 1/2"
AB
10.483
U
1.625
depth
0.375
T
2.087
H
0.531
d1
A 4
Performed by:
Checked:
Customer:
W22 Cooling Tower Motors: NEMA Premium
31-DEC-2012Three-phase induction motor
Frame 256T - IP55
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