Customer :
Three-phase induction motor - Squirrel cage rotor
No.:
Date: 31-DEC-2012
TECHNICAL PROPOSAL
Product line :
Catalog Number : 05018ET3PCT326T
List Price : $5,865
Notes:
Performed by: Checked:
Cooling Tower Motors : NEMA Premium
DATA SHEET
Three-phase induction motor - Squirrel cage rotor
Customer :
Product line :
Frame : 326T
Output : 50 HP
Frequency : 60 Hz
Poles : 4
Full load speed : 1780
Slip : 1.11 %
Voltage : 200 V
Rated current : 139 A
Locked rotor current : 1020 A
Locked rotor current (Il/In) : 7.3
No-load current : 63.3 A
Full load torque : 146 lb.ft
Locked rotor torque : 260 %
Breakdown torque : 280 %
Design : B
Insulation class : F
Temperature rise : 80 K
Locked rotor time : 20 s (hot)
Service factor : 1.25
Duty cycle : S1
Ambient temperature : -20°C - +40°C
Altitude : 1000
Degree of Protection : IP55
Approximate weight : 617 lb
Moment of inertia : 9.1624 sq.ft.lb
Noise level : 71 dB(A)
Cooling Tower Motors : NEMA Premium
No.:
Date: 31-DEC-2012
D.E. N.D.E. Load Power factor Efficiency (%)
Bearings 6312 2RS 6212 2RS 100% 0.81 94.5
Regreasing interval --- --- 75% 0.76 94.5
Grease amount --- --- 50% 0.65 93.6
Notes:
Performed by Checked
PERFORMANCE CURVES RELATED TO RATED OUTPUT
Three-phase induction motor - Squirrel cage rotor
100
1.0 0.0
90
0.9
80
0.8
70
0.7
60
0.6
50
0.5
40
0.4
C
A
B
No.:
Date: 31-DEC-2012
C - Slip D - Current at 200V (A)
1.0
2.0
3.0
4.0
5.0
160
120
A - Efficiency (%)
B - Power factor
0 10 20 30 40 50 60 70 80 90 100 110 120 130
Customer :
Product line :
Frame : 326T
Output : 50 HP
Frequency : 60 Hz
Full load speed : 1780
Voltage : 200 V
Rated current : 139 A
Insulation class : F
Notes:
Cooling Tower Motors : NEMA Premium
D
Percent of rated output (%)
Locked rotor current (Il/In) : 7.3
Duty cycle : S1
Service factor : 1.25
Design : B
Locked rotor torque : 260 %
Breakdown torque : 280 %
80
40
0
Performed by Checked
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
B
Speed related to rated speed (%)
Cooling Tower Motors : NEMA Premium
9.0
8.0
7.0
A
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Frame : 326T
Output : 50 HP
Frequency : 60 Hz
Full load speed : 1780
Voltage : 200 V
Rated current : 139 A
Insulation class : F
Notes:
Performed by Checked
Locked rotor current (Il/In) : 7.3
Duty cycle : S1
Service factor : 1.25
Design : B
Locked rotor torque : 260 %
Breakdown torque : 280 %
1 2 3 4 5 6 7 8
A
B
C
D
Notes:
E
Performed by:
2E
12.500
B
14.567
K
F
3.346
N-W
5.250
d1
A 4
BF
0.828
2F
12.000
C
31.116
O
15.953
U
2.125
Flange
FD-406
BB
0.203
H
0.657
D
8.000
P
15.591
R
1.844
AJ
16.000
BA
5.250
G
1.307
ES
3.937
AB
11.496
AK
14.000
A
15.157
J
3.228
S
0.500
AA
NPT 2"
BD
18.000
Checked:
Customer:
Cooling Tower Motors : NEMA Premium
31-DEC-2012Three-phase induction motor
Frame 326T - IP55
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