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 »
N3-407-C-U-Dealers Electric-Teco
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N3-407-C-U-Dealers Electric-Teco N3-407-C-U-Dealers Electric-Teco  
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7.5 HP, VFD, 460 Volts, 3 Phase, NEMA 1, Speed Potentiometer, Teco, N3-407-C-U

Model #: N3-407-C-U  
460 Volts 3 Phase Input, 460 Volts 3 Phase Output
Stock:  113
HP : 7.5
Enclosure : NEMA 1
Input Voltage : 460
Input Phase : 3
Manufacturer : Teco-Westinghouse
Output Voltage : 460
Output Phase : 3
Model : N3
Item Condition : Factory New
Category : Frequency Drive
Weight:  15 lbs
Retail Price$580.50
Our Price:
You Save:$180.50 (31%)
Quantity 2 - 6 7 - 12 13+
 Price $400.00

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
  • Remarks: Speed Potentiometer
  • Input Voltage: 460 Volts; 3-Phase
  • Output Voltage: 460 Volts; 3-Phase
  • Constant Torque Horsepower: 7.5
  • Constant Torque Amps: 13
  • Variable Torque HP: --
  • Variable Torque Amps: --
  • Enclosure: NEMA 1
  • Dimensions (HxWxD): 10.24" x 7.32" x 7.68"
  • NEMA 1 kit part number: SNA302 (included with drive)
  • Factory New with manufacturer's warranty
  • Enclosure: NEMA 1 (IP20 chassis unit plus included NEMA 1 box)
  • 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)
    Includes Built-In Braking Transistor
  • 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)
  • 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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