30KV/5000mA High Voltage Tester

The insulation resistance testing of high horsepower induction motors involves capacitive discharge currents of the order of 5000 mA at typical medium voltages such as 30 kV or higher. Also can be tested with this high voltage tester are very large distribution transformers, induction generators used in wind energy systems, lightning protection systems and any insulation accessories meant to withstand voltages of the order of 30 kV

1. Oil cooled Auto Transformer with Motorized variac: The 3 phase, 415 V, 50 Hz, oil cooled variac is designed so as to draw the required current from the mains at various primary voltage levels. DC Stepper motor based Servo Controlled Voltage mechanism ensures good voltage regulation (line regulation) even at a fluctuating line voltage typically encountered at large industrial sites.
2. Control Panel: This is a user friendly control panel for user input, programming of the micro controller based timer as well as for displaying test results. The control panel is maintained at a safe distance from the variac unit as well as the HV Transformer for user safety.
3. High Voltage Transformer: The most critical component of the system is housed in a third fabricated unit which generates a high voltage of 415 / 50 kV is rated for 2000 mA leakage current. It is Oil cooled making it ideal for a long duration duty cycle. It is in built with a current limiting resistance for burnout test.

  1. High Voltage Range: 0 – 30 KV / AC.

  1. Input Supply: 3 Phase 50 Hz, 250 A for power circuit.

  2. Tripping Threshold : Selectable Intermediate values up to 5 A

  3. Time to Reach Set Voltage: Adjustable with switch.

  4. Time duration for H.T.ON: On Auto – 0 – 999 Sec Adjustable on 3 digit preset timer.

  5. Leakage Current Indication: 0 to 5.00 A AC on digital Ammeter.

  6. High Voltage Indication: 0 – 30.0 KV AC on digital voltmeter.

  7. Mode of operation:

    • Auto (Voltage and time are pre-set to desired levels and test is automatic)

    • Manual (Voltage is increased gradually by the user with the help of a push button and a servo controlled motorized variac)

The insulation resistance testing of high horsepower induction motors involves capacitive discharge currents of the order of 5000 mA at typical medium voltages such as 30 kV or higher. Also can be tested with this high voltage tester are very large distribution transformers, induction generators used in wind energy systems, lightning protection systems and any insulation accessories meant to withstand voltages of the order of 30 kV.

The system comes with an expertly designed high voltage transformer of the order of 30 kV that is capable of sourcing leakage current in the order of 5000 mA for considerable time without a significant drop in other performance parameters in the system.

The capacitive currents are measured with true rms sensing circuits that accurately implement the thresh-hold go / no go leakage currents, thus making accurate conformance as how the application demands.

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