A variable frequency drive is an electronic device that allows you to start, stop, and control the speed of a three phase motor. It is also a motor starter as it is equipped with overload protection. Read more »
What is the difference between a 'new surplus' motor and a 'factory new' motor?
Our New Surplus electric motors and drives are new and unused overstock or discontinued items offered at lower prices and come with our 90-day warranty.
Factory New products are competitively priced and come with a manufacturers warranty.
Variable frequency drives (VFDs or inverters) now play an important part in major industry.
Within the last 10 years they have been perfected to control and vary the speed of 3 phase electric motors. They serve many purposes, besides speed control. Homeowners and hobbyist alike, who have lathes or milling machines with a 3 phase motor, usually don't have 3 phase power to operate. These VFDs (instead of using a rotary phase converter) can now be used to convert single phase power to 3 phase power. Read more »
Explosion Proof NEMA 143T-445T - TEFC, Foot Mounted - Cast Iron
Horsepower: 20
RPM: 1200
Frame: 286T
Voltage: 575 V
Full Load Efficiency
Eff.: 91.7
"C" Dimension (In.): 28.30
Service Factor @ 60 Hz: 1.15
Full Load Amps: 19.40
Includes Thermistors for Overload Protection
NEMA Premium Efficiency
NEMA MG1 part 31 inverter duty
UL & CSA certified 20:1 variable
torque
UL certified 5:1 constant torque
CSA certified 10:1 constant
torque
UL/CSA approved Div I, Class I,
Group C & D: 143T - 256T; Div I,
Class I, Group D: 284T & above
UL/CSA approved Div I, Class II
Groups E, F & G. T3B
temperature code
Service factor 1.15 sine wave
power
IP55 degree of protection
NEMA design B
Class F insulation
Dual rated 60/50 Hz
Normally closed thermostats—
One per phase
Sealed ball bearings 140 - 280T
Regreasable bearings 320T and
above
Warranty: 3 years
Factory New
Footed-Premium
Cast Iron
GENERAL INFORMATION
HP
KW
Pole
RPM
Frame
Voltage
Hz
Phase
IP Rating
20
-
6
1200
286T
575 V
60
3
IP55
Enclosure
Ins. Class
Service Factor
Time Rating
NEMA Design
Rated Amb.
Rate Altitude
TEFC
F
1.15
Continuous
B
-15 to 40 C°
<3300 ft
TYPICAL PERFORMANCE
Efficiency (%)
Power Factor (%)
Full Load
3/4 Load
1/2 Load
Full Load
3/4 Load
1/2 Load
91.7
93
93
84
81
74
LRT %
BDT %
Full Load Amps
Locked Rotor Amps
NEMA KVA Code
575 V
575 V
210
220
19.45
116
G
Weight*
Bearing Size
Oil Seal
Sound Level
Lbs.
Drive End
Non-Drive End
Drive End
Non-Drive End
dB(A)
530
-
-
-
-
-
* Weights shown are estimated and based on standard foot mounted motor designs
VFD DUTY INFORMATION
Variable Torque
Constant Torque
Rating
CSA Certified
6 - 60 Hz
6 - 60 Hz
UL/CSA Approved Class I DIV I Group D Class I Groups E, F & G T3B
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