Application:

This tester is widely used for testing newly and rewound motors. It helps in finding and predicting the faults in motors before it actually happens. This tester is used in the motor shop and in field to test the following:

•  1φ & 3φ Stators

•  Stators of Ceiling fan, Table & Exhaust fans

•  Stators of BLDC motor

•  Stators of Cooler and pumps

•  Field coils of mixer motors

•  Stators of AC and fridge

•  Automotive starters & alternators

Test Specifications:

The Automatic Sequential Analyzer performs tests in sequence, stopping if a fault is detected and triggering a buzzer alarm.

​

I) Resistance Test with Temperature Compensation
This test detects resistance variations between phases by applying a constant current to the winding and measuring the potential drop. The resistance value is compensated to either 20°C or 25°C based on user requirements.

​

Four Resistance Ranges:

• Range 1: 0.001 – 1.999 Ohms

• Range 2: 0.01 – 19.99 Ohms

• Range 3: 0.1 – 199.9 Ohms

• Range 4: 0 – 1999 Ohms

​

Time:

• 0-10 sec

​

II) I.R (Megohm) Test
This test evaluates the strength of ground wall insulation, which may deteriorate due to dirt, carbon, moisture, or weak wire insulation.

​

Test Voltage:

• 500 Volts (DC)

​

Test Time:

• 0-10 sec

​

I.R Limit:

• 0-200 MΩ

​

III) H.V Flash Test
The H.V Flash test assesses insulation strength at a higher voltage than the I.R test. A sudden surge in leakage current indicates weak insulation, causing test failure.

​

H.V Flash test = (2×E + 1000), where E is the operating voltage.

​

Test Voltage:

• 0-2.5KV AC (Adjustable)

​

Test Time:

• 0-10 sec

​

Overtrip Leakage Current Limit:

• 0.1-10 mAmps

IV) Masterless Surge Test
The Automatic Surge test checks each phase of the stator for turn-to-turn, coil-to-coil, and phase-to-phase insulation faults by comparing the waveform with a stored master waveform. If the %EAR variation exceeds the user-set limit, the system triggers an audio/visual alarm and halts the test sequence. This test also detects open circuits, grounds, phase reversals, misconnections, and incorrect turn counts.

​

Surge test = √2 × (2×E + 1000), where E is the operating voltage.

​

Max Surge Voltage:

• 0 – 5000 Volts (Adjustable)

​

Max Pulse Current:

• 330 Amps

​

Max Pulse Energy:

• 1.0 J

​

Impulse Rise Time:

• 0.1-0.2 μS (In accordance with IEEE 522 standard)

​

Impulse Repetition Rate:

• 50 Hz (50 Pulses per second)

​

Vertical Sensitivity:

• 250V/DIV, 500V/DIV, 1000V/DIV

​

Sweep/Time Base:

• 10 μS – 10mS

​

Input Test Voltage Requirements

Operating Voltage:

• 230V ± 10%

​

Power Consumption:

• 300W

​

Weight

• 100 kgs (approx)

​

Physical Dimensions (W x H x D)

• 550 x 1700 x 650 mm