When purchasing an on-load tap-changer tester, ambiguous parameter labeling and unclear on-site adaptability are often encountered. The KDZ-5100 On-Load Tap-Changer Tester provides clear answers to these questions: three independent test power supplies, with a maximum output current of 0.5A, can apply test signals to the three-phase windings separately, avoiding inter-phase interference caused by a shared power supply. The transition time measurement resolution reaches 5ms, capable of capturing a normal switching process of generally over 100 milliseconds; the three-phase simultaneity accuracy is 0.1ms, and the three-phase waveform display accuracy is 0.3ms, meeting the measurement requirements for on-load tap-changers of autotransformers with large inter-phase differences.
Traditional solutions mostly use a single power supply with an external phase-splitting switching device, resulting in cumbersome wiring and synchronization that relies on manual operation. The KDZ-5100 integrates three power supplies into one unit, with computer-controlled measurement processes that automatically record transition resistance, transition waveforms, and three-phase simultaneity data. Compared with test methods requiring a combination of multiple devices, this instrument reduces on-site wiring steps and lowers measurement deviations introduced by poor contact. For procurement personnel, a single device can cover core parameters such as transition time, transition waveforms, and transition resistance, helping to control procurement costs and later maintenance complexity.
The instrument's operating power supply is AC220V±10%, with an ambient temperature adaptation range of -10℃ to 50℃, suitable for use in substation sites and maintenance workshops. The measurement circuit is designed for the switching process of on-load tap-changers, capable of recording waveform details during switching to assist in judging contact wear or abnormal transition resistance. It is suitable for routine tests, handover acceptance, and troubleshooting of power transformer on-load tap-changers, providing data reference for maintenance decisions.
The test process is controlled by a computer, and measurement results are displayed synchronously in waveform and numerical forms, with three-phase simultaneity and transition time read directly. Transition resistance measurement is combined with waveform analysis to facilitate distinguishing normal switching from abnormal jitter. During procurement and selection, attention can be paid to the instrument's adaptability to scenarios with large inter-phase differences in autotransformers; the three independent power supply design of the KDZ-5100 has practical significance in this scenario.
