• MCSA is monitoring stator current of the motor.
• Typical stator current monitoring system is illustrated in Figure.
• Single stator current monitoring system is commonly used.
• Motor stator windings are used as transducer in MCSA, picking the signals from the rotor.
• Motor current is sensed by a Current Sensor with resistive shunt across its output, and recorded in time domain.
• Picked current signal is then led to a spectrum analyzer or specialized MCSA instrument.
• In ideal case motor current should be pure sinusoidal wave.
• In reality in motor current many harmonics are present.