Weatherford Electric Motors
®
Proven motors for multiple applications.
Performance. Durability. Safety.
Weatherford® Electric Motors
Weatherford’s high-performance pumping unit
motors are designed to withstand extreme conditions.
We have units operating in the searing desert heat
of the Middle East, where temperatures can reach
140°F (60°C), in the rainforests of Indonesia and
South America, and in the colder climates of the
Rocky Mountains in the United States. Several
features contribute to the durability of our systems
in extreme conditions, including fan-cooled (TEFC)
frames, optional Class H insulation, premium-quality
components, and vacuum-pressure impregnation.
More than 1,000 of our electric motors
are operating in the desert conditions
of the Middle East. We have yet to
receive any reports of winding or rotor
failures on systems that have their
inherent protection connected.
Our experienced technical specialists can help you select the design best
suited to your needs. With a wide selection of rugged, dependable motors,
Weatherford can meet your oilfield applications for
•
•
•
•
NEMA D motors for dynamic loads;
NEMA B high-efficiency motors for steady-state loads, such as pumps;
inverter-rated motors for use with variable-frequency drives;
special-frame-construction motors for hazardous, explosion-proof
and Class I Div. II environments.
Frame design for dependable performance.
Weatherford motor frames meet NEMA standards in totally enclosed, TEFC
and explosion-proof designs. European IEC-standard frames are also available.
Constructed of rugged cast iron, our oilfield-proven motors are designed
for dependable operation. Cooling fins, which are cast into the frame, enhance
motor performance and durability by substantially increasing the surface area
for heat dissipation.
Torque and slip designs to meet system demands.
We offer NEMA D and NEMA B designs that produce the torque and slip
characteristics to match system demands.
Pumping units benefit from the high-starting torque and greater slip provided
by our NEMA D (high-slip) motors. The ability of these motors to change speed
under varying torque requirements reduces torsional loads on the gearbox and
provides starting characteristics superior to those of the NEMA C and B designs.
Ultra-high slip motors are available in Weatherford’s Econo-Pac™ III line.
2
© 2008–2010 Weatherford. All rights reserved.
Weatherford® Electric Motors
Our NEMA B motors offer higher efficiency in steady-state
load applications that require less starting torque, such as
multiplex and progressing cavity pumps.
We also offer inverter-duty motors, designed with
variable-frequency drives to withstand rigorous conditions.
These drives vary the frequency to control speed and
torque output, allowing you to program the control for
peak performance.
Advanced winding technology:
the key to durability.
A critical factor in motor life is the method used to apply
winding insulation, which provides mechanical strength,
electrical-insulation heat dissipation and protection from
contaminants and moisture.
Weatherford’s electric motors use vacuum-pressure impregnation (VPI)
to ensure the best insulation coverage and penetration, optimizing insulation
performance and durability.
The VPI method uses specially designed vacuum/pressure vessels to force
the insulation deep into the motor windings while eliminating the air bubbles
associated with the dip-and-bake method. Air bubbles create hotspots in the
winding and eliminating these bubbles enhances winding life. Our TEFC, or
explosion-proof motor frame, further protects the
winding insulation from moisture.
Special designs to suit your application.
We offer a wide range of horsepower and voltages, including 2, 4, 6 and 8 pole,
60/50 HZ. Frame dimensions meet NEMA standards for the United States or
IEC standards for Europe. Specialty designs can be configured to fit your
specific needs.
Top certifications and
standards for quality
assurance.
Weatherford’s commitment to quality
is reflected in the following standards
and certifications:
• ISO 9001
• ISO 10012
• Six Sigma
• Conformite Eurpoéene (C-E)
• Canadian Standards Association
(CSA)
• National Electrical Manufacturers
Association (NEMA)
• International Electrotechnical
Commission (IEC)
© 2008–2010 Weatherford. All rights reserved.
3
Weatherford® Electric Motors
NEMA Motor Dimensions (in./cm)
Frame
143T
145T
182T
184T
213T
215T
254T
256T
A Max
D
E
7.0
17.8
3.5
8.9
2.8
7.1
9.0
22.9
4.5
11.4
3.8
9.7
10.5
26.7
5.25
13.33
4.3
10.8
12.5
31.8
6.25
15.88
5.0
12.7
284T
284TS
286T
14.0
35.6
7.0
17.8
5.5
14.0
286TS
324T
324TS
326T
16.0
40.6
8.0
20.3
6.3
16.0
326TS
364T
364TS
365T
18.0
45.7
9.0
22.9
7.0
17.8
365TS
404T
404TS
405T
20.0
50.8
10.0
25.4
8.0
20.3
405TS
444T
445TS
9.50
24.13
11.00
27.94
10.50
26.67
12.00
30.48
11.25
28.58
12.25
31.11
12.25
31.11
13.75
34.93
14.50
36.83
444TS
445T
2F
4.00
10.16
5.00
12.70
4.50
11.43
5.50
13.97
5.50
13.97
7.00
17.78
8.25
20.96
10.00
25.40
22.0
55.9
447TS
449TS
11.0
27.9
9.0
22.9
16.50
41.91
20.0
50.8
25.00
63.50
H
U
BA
N-W
V min.
R
ES min.
S
0.30
0.76
0.88
2.24
2.3
5.8
2.25
5.72
2.00
5.08
0.77
1.96
1.41
3.58
0.188
0.478
0.40
1.01
1.13
2.87
2.8
7.1
2.75
6.99
2.50
6.35
0.99
2.51
1.78
4.51
0.250
0.635
0.40
1.02
1.38
3.51
3.5
8.9
3.38
8.59
3.12
7.92
1.20
3.05
2.41
6.12
0.310
0.787
0.50
1.27
1.63
4.14
4.3
10.9
4.00
10.16
3.75
9.56
1.42
3.61
2.91
7.39
0.375
0.953
4.62
11.73
3.25
8.26
4.62
11.73
3.25
8.26
5.25
13.34
3.75
9.53
5.25
13.34
3.75
9.53
5.88
14.94
3.75
9.53
5.88
14.94
3.75
9.53
7.25
18.42
4.25
10.80
7.25
18.42
4.25
10.80
8.50
21.59
4.75
12.07
8.50
21.59
4.38
11.13
3.00
7.62
4.38
11.13
3.00
7.62
5.00
12.7
3.50
8.89
5.00
12.7
3.50
8.89
5.62
14.27
3.50
8.89
5.62
14.27
3.50
8.89
7.00
17.78
4.00
10.16
7.00
17.78
4.00
10.16
8.25
20.96
4.50
11.43
8.25
20.96
1.59
4.04
1.42
3.61
1.59
4.04
1.42
3.61
1.85
4.70
1.59
4.04
1.85
4.70
1.59
4.04
2.01
5.11
1.59
4.04
2.01
5.11
1.59
4.04
2.45
6.22
1.85
4.70
2.45
6.22
1.85
4.70
2.88
7.32
2.02
5.13
2.88
7.32
3.28
8.33
1.91
4.85
3.28
8.33
1.91
4.85
3.91
9.93
2.03
5.16
3.91
9.93
2.03
5.16
4.28
10.87
2.03
5.16
4.28
10.87
2.03
5.16
5.65
14.33
2.78
7.06
5.65
14.33
2.78
7.06
6.91
17.55
3.03
7.70
6.91
17.55
0.500
1.270
0.375
0.953
0.500
1.270
0.375
0.953
4.75
12.07
4.50
11.43
2.02
5.13
3.03
7.70
0.625
1.588
0.50
1.27
0.70
1.78
0.70
1.78
0.80
2.03
0.80
2.03
0.81
2.06
1.88
4.78
1.63
4.14
1.88
4.78
1.63
4.14
2.13
5.41
1.88
4.78
2.13
5.41
1.88
4.78
2.38
6.05
1.88
4.78
2.38
6.05
1.88
4.78
2.88
7.32
2.13
5.41
2.88
7.32
2.13
5.41
3.38
8.59
2.38
6.05
3.38
8.59
2.38
6.05
4.8
12.2
5.3
13.5
5.9
15.0
6.6
16.8
7.5
19.1
0.500
1.270
0.625
1.588
0.500
1.270
0.625
1.588
0.500
1.270
0.750
1.905
0.500
1.270
0.750
1.905
0.500
1.270
0.875
2.223
0.625
1.588
0.875
2.223
Performance. Durability. Safety. Let us help you select the
best electric motor for your application. Contact your authorized
Weatherford representative, or visit weatherford.com.
weatherford.com
© 2008–2010 Weatherford. All rights reserved.
771.03
Weatherford products and services are subject to the Company’s standard terms and conditions, available on request or at weatherford.com. For more information contact an authorized Weatherford representative. Unless noted
otherwise, trademarks and service marks herein are the property of Weatherford and may be registered in the United States and/or other countries. Weatherford products named herein may be protected by one or more U.S. and/or
foreign patents. For more information, contact patents@weatherford.com. Specifications are subject to change without notice. Weatherford sells its products and services in accordance with the terms and conditions set forth in the
applicable contract between Weatherford and the client.