Page 1
Customer :
Three-phase induction motor - Squirrel cage rotor
No.:
Date: 20-DEC-2012
TECHNICAL PROPOSAL
Product line :
Catalog Number : 25018OT3G445T
List Price : $15,513
Notes:
Performed by: Checked:
Three-Phase : ODP (IP21/IP23) - NEMA Premium Efficiency
Page 2
DATA SHEET
Three-phase induction motor - Squirrel cage rotor
Customer :
Product line :
Frame : 445T
Output : 250 HP
Frequency : 60 Hz
Poles : 4
Full load speed : 1780
Slip : 1.11 %
Voltage : 460 V
Rated current : 275 A
Locked rotor current : 1930 A
Locked rotor current (Il/In) : 7.0
No-load current : 76.0 A
Full load torque : 728 lb.ft
Locked rotor torque : 210 %
Breakdown torque : 250 %
Design : B
Insulation class : F
Temperature rise : 80 K
Locked rotor time : 14 s (hot)
Service factor : 1.15
Duty cycle : S1
Ambient temperature : -20°C - +40°C
Altitude : 1000
Degree of Protection : IP23
Approximate weight : 2029 lb
Moment of inertia : 57.163 sq.ft.lb
Noise level : 78 dB(A)
Three-Phase : ODP (IP21/IP23) - NEMA Premium Efficiency
No.:
Date: 20-DEC-2012
D.E. N.D.E. Load Power factor Efficiency (%)
Bearings 6319 C3 6316 C3 100% 0.88 95.8
Regreasing interval 20000 h 20000 h 75% 0.86 95.8
Grease amount 45 g 34 g 50% 0.81 95.4
Notes:
Performed by Checked
Page 3
PERFORMANCE CURVES RELATED TO RATED OUTPUT
Three-phase induction motor - Squirrel cage rotor
100
1.0 0.0
90
0.9
80
0.8
C
A
No.:
Date: 20-DEC-2012
C - Slip D - Current at 460V (A)
1.0
2.0
70
0.7
60
0.6
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 : 445T
Output : 250 HP
Frequency : 60 Hz
Full load speed : 1780
Voltage : 460 V
Rated current : 275 A
Insulation class : F
Three-Phase : ODP (IP21/IP23) - NEMA Premium Efficiency
B
D
Percent of rated output (%)
Locked rotor current (Il/In) : 7.0
Duty cycle : S1
Service factor : 1.15
Design : B
Locked rotor torque : 210 %
Breakdown torque : 250 %
3.0
4.0
5.0
400
300
200
100
0
Notes:
Performed by Checked
Page 4
5.0
CHARACTERISTIC CURVES RELATED TO SPEED
Three-phase induction motor - Squirrel cage rotor
No.:
Date: 20-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
A
Speed related to rated speed (%)
Three-Phase : ODP (IP21/IP23) - NEMA Premium Efficiency
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Frame : 445T
Output : 250 HP
Frequency : 60 Hz
Full load speed : 1780
Voltage : 460 V
Rated current : 275 A
Insulation class : F
Notes:
Performed by Checked
Locked rotor current (Il/In) : 7.0
Duty cycle : S1
Service factor : 1.15
Design : B
Locked rotor torque : 210 %
Breakdown torque : 250 %
Page 5
1 2 3 4 5 6 7 8
A
B
C
D
Notes:
E
2E
18.000
J
3.937
S
0.875
O
F
22.440
AB
20.236
Flange
FD-508
BB
0.250
A
21.929
K
5.590
D
11.000
T
3.544
C
39.803
AJ
20.000
2F
14.500/16.500
P
22.125
N-W
8.500
HD
25.984
AA
2XNPT 3"
AK
18.000
B
20.078
ES
7.087
G
1.811
R
2.880
d1
DUNC 3/4"-10
BD
21.653
BA
7.500
depth
0.875
U
3.375
H
0.807
d2
DUNC 3/4"-10
BF
0.828
Performed by:
Checked:
Customer:
Three-Phase : ODP (IP21/IP23) - NEMA Premium Efficiency
20-DEC-2012Three-phase induction motor
Frame 445T - IP23
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