PJ Electronics Surge Tester Series

Over the past five decades, PJ Electronics has been dedicated to the research, development, and manufacturing of high-frequency, high-voltage surge testers, with output voltages reaching up to 50,000 volts. With deep expertise in motor insulation testing technology, PJ’s surge testers have become a global industry benchmark, widely used for detecting inter-turn insulation faults in motors, generators, transformers, and various types of windings. Today, PJ surge testers are in use across 43 countries worldwide, renowned for their exceptional sensitivity, accuracy, and reliability that have earned the trust of manufacturers and testing institutions alike.

The core strength of PJ Electronics lies in its unique high-frequency bidirectional switching technology, the only solution in the industry capable of achieving true high-frequency surge discharge. This design enables an ultra-fast voltage rise time of 0.1 microseconds, fully compliant with international standards such as IEEE 522-1922 and IEC 34-15. Unlike pulse-type testers that rely on unidirectional switches, PJ surge testers deliver precise and stable voltage outputs at a high-frequency resonance of 60 pulses per second, with every unit calibrated to NIST-traceable standards. When combined with a Tektronix digital oscilloscope, users can perform real-time calibration and verification, ensuring repeatable and reliable test results.

Thanks to its robust adaptability and safe design, the PJ surge tester series is ideal for manufacturing, refurbishment, quality control, preventive maintenance, and laboratory R&D. It efficiently detects potential issues such as inter-turn short circuits, misconnected coils, winding imbalance, open circuits, grounding, and short faults. The system supports testing of both grounded and ungrounded fully assembled motors without removing the rotor, significantly improving testing efficiency and operational convenience. Applicable components include low- and high-impedance coils, stators, armatures, electromagnets, motors, generators, and transformers.

Guided by the philosophy of “Precision Manufacturing and Continuous Innovation,” PJ Electronics combines rigorous craftsmanship with engineering excellence to produce surge testers celebrated as “the Rolls-Royce of quality and the Lamborghini of performance.” For more than half a century, the company has led advancements in surge testing technology, continually providing the global motor industry with safer, more efficient, and more accurate insulation testing solutions.

Specifications and Product Model Overview