Electrical Test Equipment

“TOSHIBA” CM2000 Partial Discharge (PD) Detection System
The CM 2000 Partial Discharge (PD) Detection system is used as part of an “on line” condition monitoring program (periodic measurements) on high voltage rotating machines, particularly those over 6kV.
Application of regular partial discharge measurement is considered an acceptable method to minimize the risk factor when applying design and operation sparking risk assessments such as ENV 50269 or its successors.


HIPOTRONIC” High Potential Testing (Hi-Pot)
High Potential Tester: AC and AC/DC Types. AC charging current is extremely large with minor leakage current. Sometimes this is called destructive testing in that voltage is increased to some specific point to see if the insulation can with stand that particular voltage. It is Go/No Go type test and can cause deterioration of the insulation, as opposed to the DC non destructive test mega ohmmeter.

“BAKER” Surge Comparison Testing
High Voltage Surge Comparison Testing is the most effective test available to check quality of electrical windings. All windings repaired at PT. MEGA DAYA undergo this and many other tests.
“AVO” Megger Testing
The Insulation (Megger) test is performed using a test voltage based on the operating voltage of the motor and the appropriate standards / company testing guidelines. The insulation basic electrical maintenance and troubleshooting test can help you diagnose potential insulation problems and reasonably predict when they will occur.

“TETTEX INSTRUMENT” Delta Tan Angel Testing
The dielectric data of insulating systems give us an idea of their electrical properties. Age and wear may change these data. By measuring the dielectric data regularly, it is possible to control the operational reliability of the insulating system and avoid costly breakdown and repairs. Therefore, operational measuring tests are common today-particularly for high voltage equipment,
such as transformers, generators machines, overhead lines and underground cables.

SHORTED TURN ANALYZER
The “Generator Rotor Shorted Turn Analyzer” or RSO (Repetitive Surge Oscilloscope) produces a succession of step-shaped low voltage pulses. The pulses are introduced simultaneously to the dc rotor winding (“field winding”) from both ends. The resulting reflected signals can be viewed on a dual channel oscilloscope screen as two separate waveforms, or after one of them is inverted, and both summed as a single trace.
 
sta Shorted turns in generator cylindrical rotor field windings can contribute to vibration problems due to rotor thermal bending from the uneven heating associated with non-symmetrical DC current flow and watt losses in faulted windings. Shorted turns can also cause unbalanced magnetic flux in the air gap that can also aggravate vibration problems. Since vibration signature analyses for rotor shorted turn problems is not always an exact science, it is desirable to have confirming data from other testing before proceeding with very costly disassemblies and repairs of large machines. Additional tests for confirming the existence of shorted turns in generator rotor field windings are commonly performed before committing to expensive repairs.