Motor Checker ET 4P

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MOTOR CHECKER ET 4P is a portable diagnostic tool for Electrical Engineer and is used for quick on-site checks of electric motor and other three-phase machines.

A reduction in machine performance, such as inefficient operation or tripping of overloads, may indicate mechanical or electrical faults. If the fault is electrical the MOTOR CHECKER ET 4P will immediately detect it, without having to dismantle the equipment.

The MOTOR CHECKER ET 4P may also be used to check quality and condition of motors which have been in storage before they are installed.

The instrument has three separate operating modes to measure different types of faults like faulty insulation, open circuits / loose connections, short circuits and rotor defects. Motor insulation is tested with a high voltage of 500 V DC supplied by the instrument.


  • Insulation Resistance Measurement.
  • Identify Open and short Circuits/ Loose Connections in a winding coil.
  • Identify inter turn short.
  • Detect rotor bar problems without Dismounting the rotor.
  • Simple operation accurate & quick assessment of motor condition.
  • Low battery indication.
  • All these defects can be checked within A few minutes without dismounting the equipment.

Technical Data:

  • Insulation Resistance : 0-20Megohms at 500 VDC max. Current 0.25mA
  • Resistance : 0-60 ohms in 6 range (0.2 ohms F.S.D. in range 6)
  • Inductance : 0-300mH in 6 ranges (1mH F.S.D. in Range 6)
  • Operating Temp.range : 0 - 55C
  • Size : 210x125x65
  • Weight : 1000 gms (Appro)
  • Power : 1.5V X 6AA size cells with electronic Zero-set facility.

Technical data are subject to change without notice

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