On-Load Tap Changer Tester|XHYZ1668
Introduction
The on-load tap changer is the only moving part connected to the transformer circuit, so its detection is increasingly important. According to the procedures for handover and preventive tests of electrical equipment, the action sequence and switching time of the on-load tap changer must be checked. The XHYZ1668 On-Load Tap Changer Tester measures the transition waveform, transition time, instantaneous transition resistance values and three-phase synchronization. It features high intelligence with full Chinese menu prompts, simple operation, compact size, light weight and strong anti-interference, greatly reducing field workload, and is an ideal instrument for power generation and supply units and the transformer manufacturing industry.
Key Features
- Large output current with light weight.
- Tests YN, Y and delta transformers with resistance values displayed directly without conversion.
- Supports measurement both with and without winding.
- Waveform display automatically adjusts resistance and time amplitude based on sampling values.
- Complete protection circuit for strong reliability.
- 7-inch large LCD display for convenient field operation.
- Internal storage of 500 groups of data.
Technical Specifications
| Output current |
1.0A, 0.5A, 0.2A |
| Transition resistance range |
0.3Ω ~ 20Ω (1.0A)
5Ω ~ 40Ω (0.5A)
20Ω ~ 100Ω (0.2A) |
| Transition time |
0 ~ 320 ms |
| Open circuit voltage |
24 V |
| Measurement accuracy |
Transition resistance: ±(5% reading ±0.1Ω)
Transition time: ±(0.1% reading ±0.2 ms) |
| Sampling rate |
20 kHz |
| Storage |
Local storage (500 groups) |
| Dimensions |
Host: 360 × 290 × 170 mm
Cable box: 360 × 290 × 170 mm |
| Weight |
Host: 6.15 kg
Cable box: 4.55 kg |
| Ambient temperature |
-10ºC ~ 50ºC |
| Ambient humidity |
≤ 85% RH |
| Working power supply |
AC220V ±10% |
| Power frequency |
50 ±1 Hz |
Who Is It For
Built for professionals who must verify on-load tap changer performance and diagnose defects, the XHYZ1668 serves production and maintenance teams that generic tap-changer testers cannot fully cover:
- Transformer manufacturing plants running production-line QC of on-load tap changers.
- Power generation and supply units performing preventive and handover tests.
- OLTC maintenance and service specialists diagnosing transition defects.
- Third-party electrical testing and inspection agencies.
Product Details
FAQ
1. Who is this tap changer tester designed for?
It is built for transformer manufacturing plants performing production-line QC, power generation and supply units running preventive tests, and OLTC maintenance specialists who need fast, accurate waveform diagnosis.
2. Can it test transformers with different winding connections?
Yes. It directly tests YN, Y and delta transformers and displays transition resistance without manual conversion, ideal for QC engineers verifying multiple winding types.
3. Does it support testing without a winding?
Yes. It measures both with and without winding, giving service teams flexibility when a transformer cannot be fully energized.
4. How does the high sampling rate help fault diagnosis?
20kHz sampling captures detailed transition waveforms to reveal spring aging, broken transition resistors and loose connections, helping crews pinpoint OLTC defects quickly.
5. What range and accuracy does it provide?
Transition resistance 0.3Ω-100Ω across 0.2A/0.5A/1.0A current levels at ±(5% reading ±0.1Ω), and transition time 0-320ms at ±(0.1% reading ±0.2ms).
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