What is a Variable Frequency Drive?
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 »
N3-240-N1-U-Dealers Electric-Teco
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40 HP, 230 Volts, 3 Phase, NEMA 1, Teco, N3-240-N1-U

Model #: N3-240-N1-U  
230 Volts 3 Phase Input, 230 Volts 3 Phase Output
Stock:  2
HP : 40
Enclosure : NEMA 1
Input Voltage : 230
Input Phase : 3
Manufacturer : Teco-Westinghouse
Output Voltage : 230
Output Phase : 3
Model : N3
Item Condition : Factory New
Weight:  90 lbs
Retail Price$3,565.54
Our Price:
You Save:$1,575.54 (44%)

N3 Compact Variable Speed Drive

A compact, low cost, and versatile AC Drive that can operate in constant torque, variable torque, or sensorless vector modes for maximum application flexibility.


  • Model #: N3-240-N1-U
  • Input Voltage: 230 Volt, 3 Phase
  • Output Voltage: 230 Volt, 3 Phase
  • Constant Torque Horsepower: 40
  • Constant Torque Amps: 130
  • Variable Torque Horsepower: -
  • Variable Torque Amps: -
  • Enclosure: NEMA 1
  • Control Mode: Sensorless Vector and V/Hz
  • Frequency Control Range: 0 to 400 Hz
  • Speed Control Accuracy: +/- 0.5% (Sensorless Vector Mode)
  • Overload Capacity: 150% Current of Drive for 1 Minute
  • Braking:
    • DC Injection Braking: Dynamic Braking (optional w/ additional braking resistor purchase)
    • Dynamic Brakin requires external Braking Transistor (not included)
  • Includes DC Bus Link Reactor
  • Protective Functions: Motor and Inverter Overload, Overvoltage, Overheating, Peak Overcurrent
  • Programmable I/O: 7 Digital Inputs (NPN or PNP), 2 Relay Outputs
  • Ambient Temperature: -10°C to +50°C, (14°F to 122°F)
  • Height: 25.45"
  • Width: 10.6"
  • Depth: 12"
  • Warranty: Factory New with Manufactures Warranty
  • Do Not Apply Single Phase Input Power to these Models


  • Fan and Pump Systems
  • Larger Conveyors
  • Mixers
  • Centrifugal Applications


  • Sensorless Vector AC Drive
  • BACnet and Modbus RTU Protocols Embedded
  • PID Control with Sleep Mode
  • N3 Compact Drive Operator Interface Features
    • Simple Full Featured Operator with Speed Potentiometer
    • Configuration Mode Indication
    • LEDs Indicate Mode Sequence
    • Bright 4-Digit LED Display
    • LEDs Indicate Units of Measure
    • On-Board Speed Potentiometer
    • Can choose to operate remotely (PLC Driven) or locally
    • Removable Keypad can be installed up to 10 ft from the N3 drive using seperately purchable cable
  • PC Programming Software Available from Teco
  • RS 485 Interface Option
  • EEPROM Program Copy Unit (Optional)
  • UL, cUL, and CE Approved
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