HUAC-2071
Three-Phase Transformer Turns Ratio Tester (TTR), Battery Powered
Battery-powered three-phase TTR tester: ratio, vector group and polarity in about 10 seconds with one connection, ratio 0.9 to 10,000, 3.5 kg.
MODEL HUAC-BYKC-III
On-Load Tap Changer (OLTC) Analyzer with Touch Screen
OLTC analyzer for transition time, transition resistance, waveform and three-phase synchronism, with automatic fault marking, touch screen and Word reports.
- Transition time, waveform, resistance and three-phase synchronism
- Tests Y0, Y and Δ transformers; resistance shown directly
- Automatic fault identification and marking on the waveform
- Four-terminal measurement, no lead compensation needed
- Continuous testing to reduce downtime
- 800 × 480 touch screen, printer, 1000 results, USB and Word reports
- English user interface; English operating system available
DL/T 846.8
Overview
The HUAC-BYKC-III tests the switching sequence and timing of transformer on-load tap changers (OLTCs). It measures transition time, transition waveform, transition resistance and three-phase synchronism, following DL/T 846.8.
Analysis is automatic: the instrument identifies faults in the waveform and marks them, and adjusts the resistance and time scales to the recorded data. Tests can be made with or without the windings connected, and continuous testing shortens transformer outages.
See the full range of transformer test equipment, or send us your transformer data and we will recommend the right instrument.
Technical specifications
| Output | |
|---|---|
| Charging current | 3 A / 1 A range; 0.6 A / 0.2 A range |
| Max. port voltage | 24 V |
| Measurement | |
| Transition resistance | 0.4 – 20 Ω (1 A); 10 – 100 Ω (0.2 A) |
| Recording time | 300 ms |
| Sampling rate | 30 kHz |
| Resolution | |
| Time / resistance | 0.1 ms / 0.1 Ω |
| Accuracy | |
| Transition resistance | ±5 % of reading ±0.1 Ω |
| Transition time | ±0.5 % of reading ±0.2 ms |
| Environment | |
| Operating conditions | -10 – 40 °C, RH < 85 % |
| General | |
| Interface language | English |
Specifications may change without notice. Contact us for the latest datasheet.
Applications
On-load tap changersPower transformersPreventive maintenanceAfter tap changer overhaul
Downloads
The datasheet and user manual for this instrument are sent on request, usually within one business day.
Frequently asked questions
Why test an OLTC?
The tap changer is the only moving part in the transformer circuit. Measuring the transition sequence, time and resistance finds worn contacts, broken transition resistors and timing faults before they cause a failure.
Do I need to disconnect the windings?
No. The tester works with or without the windings connected.
Which transformer connections are supported?
Y0, Y and Δ; for Δ transformers the three-phase synchronism is also displayed.
Have another question? Ask our application engineers.
Request a quote
Get pricing for the On-Load Tap Changer (OLTC) Analyzer with Touch Screen
Tell us the asset ratings and site conditions. A sales engineer will reply with a recommendation and quotation.
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- You get a recommendationThe right model and options, with a datasheet and quotation.
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Related products
Often ordered together
HUAC-BB
Fully Automatic Turns Ratio Tester with Colour Screen
Fully automatic three-phase turns ratio tester with colour screen and blind test: ratio, vector group and polarity, ratio up to 10,000, battery or AC powered.
HUAC-BBZ-1000
Transformer Turns Ratio Tester with Thermal Printer
Single- and three-phase transformer turns ratio tester with vector group, blind test and built-in thermal printer. Ratio 0.9 to 5000, 4 kg, 220 V AC.