Customer :
Three-phase induction motor - Squirrel cage rotor
No.:
Date: 31-DEC-2012
TECHNICAL PROPOSAL
Product line :
Catalog Number : 01589EP3QCT284V2
List Price : $3,878
Notes:
Performed by: Checked:
Cooling Tower Motors : High Efficiency - Two Speed
DATA SHEET
Three-phase induction motor - Squirrel cage rotor
Customer :
Product line :
Frame : 284T
Output : 3.75 HP
Frequency : 60 Hz
Poles : 8
Full load speed : 880
Slip : 2.22 %
Voltage : 230 V
Rated current : 18.1 A
Locked rotor current : 74.3 A
Locked rotor current (Il/In) : 4.1
No-load current : 14.0 A
Full load torque : 22.1 lb.ft
Locked rotor torque : 240 %
Breakdown torque : 250 %
Design : A
Insulation class : F
Temperature rise : 80 K
Locked rotor time : 18 s (hot)
Service factor : 1.15
Duty cycle : S1
Ambient temperature : -20°C - +40°C
Altitude : 1000
Degree of Protection : IP55
Approximate weight : 408 lb
Moment of inertia : 4.6819 sq.ft.lb
Noise level : 54 dB(A)
Cooling Tower Motors : High Efficiency - Two Speed
No.:
Date: 31-DEC-2012
D.E. N.D.E. Load Power factor Efficiency (%)
Bearings 6311 2RS 6211 2RS 100% 0.51 76.0
Regreasing interval --- --- 75% 0.42 74.0
Grease amount --- --- 50% 0.32 68.0
Notes:
Performed by Checked
PERFORMANCE CURVES RELATED TO RATED OUTPUT
Three-phase induction motor - Squirrel cage rotor
100
1.0 0.0
C
90
0.9
80
0.8
70
0.7
No.:
Date: 31-DEC-2012
C - Slip D - Current at 230V (A)
1.0
2.0
3.0
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 : 284T
Output : 3.75 HP
Frequency : 60 Hz
Full load speed : 880
Voltage : 230 V
Rated current : 18.1 A
Insulation class : F
Cooling Tower Motors : High Efficiency - Two Speed
A
D
B
Percent of rated output (%)
Locked rotor current (Il/In) : 4.1
Duty cycle : S1
Service factor : 1.15
Design : A
Locked rotor torque : 240 %
Breakdown torque : 250 %
4.0
5.0
16
12
8
4
0
Notes:
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 : High Efficiency - Two Speed
9.0
8.0
7.0
6.0
A
5.0
4.0
3.0
2.0
1.0
0.0
Frame : 284T
Output : 3.75 HP
Frequency : 60 Hz
Full load speed : 880
Voltage : 230 V
Rated current : 18.1 A
Insulation class : F
Notes:
Performed by Checked
Locked rotor current (Il/In) : 4.1
Duty cycle : S1
Service factor : 1.15
Design : A
Locked rotor torque : 240 %
Breakdown torque : 250 %
1 2 3 4 5 6 7 8
A
B
C
D
Notes:
E
Performed by:
2E
11.000
B
11.575
K
F
2.953
N-W
4.622
d1
A 4
BF
0.828
2F
9.500
C
26.433
O
14.067
U
1.875
Flange
FD-317
BB
0.203
H
0.531
D
7.000
P
14.094
R
1.594
AJ
12.500
BA
4.750
G
1.016
ES
3.149
AB
10.866
AK
11.000
A
13.780
J
3.150
S
0.500
AA
NPT 1 1/2"
BD
14.000
Checked:
Customer:
Cooling Tower Motors : High Efficiency - Two Speed
31-DEC-2012Three-phase induction motor
Frame 284T - IP55
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