15000mAh Lithium Battery Transformer Turns Ratio Tester for Operation without Power Supply
Introduction
15000mAh Lithium Battery Transformer Turns Ratio Tester for Operation without Power Supply
Transformer turns‑ratio test is a mandatory item for new‑unit commissioning, overhaul work and periodic preventive maintenance. Many real‑world field obstacles often slow down jobs or create unreliable records: substation sites without available AC mains, mixing‑up IEC line‑voltage mode with IEEE turns‑ratio mode, manual note‑taking without time markers making later audit impossible, wrong tap‑position reading, mis‑judged vector‑group due to incorrect setup.
| | GDBC-901B is built to resolve those practical on‑site headaches. It uses internal high‑capacity lithium battery to finish complete testing without external mains supply. Engineers can switch between IEC line‑voltage ratio calculation and IEEE winding turns‑ratio calculation directly on‑device. It handles DY, YD, DD, YY, ZN and single‑phase transformer configurations. Besides ratio value and error reading, it captures vector group, phase‑angle difference and excitation‑current data. Every saved record carries hardware‑generated timestamp, tap‑setting and selected standard mode, giving fully traceable documentation for lab submission and asset review. Compact below‑10‑kg suitcase‑style build fits field transport between multiple substation bays. |
Practical On‑Site‑Focused Capabilities
Full lithium‑battery operation for sites with no grid power
Built‑in 12V 15000mAh lithium pack delivers over 10‑hours continuous field runtime. Field crews can run complete TTR jobs in de‑energized substations, remote wind‑farm booster stations where temporary generators are not yet deployed. Charger accepts wide‑range AC 100‑230V input for workshop or camp‑site re‑charge. Note: better avoid performing measurements while plugged‑in charging, as charging‑related noise may introduce minor reading deviation.
Dual‑standard calculation: IEC and IEEE selectable on‑unit
Two widely‑accepted transformer computation logics are pre‑installed. Users toggle IEC60076 (line‑voltage ratio) or IEEE C57.12 (winding turns‑ratio) before starting test. The tester automatically adjusts internal arithmetic, removes risk caused by manual formula mistakes that commonly happen with older manual instruments. Works for both power transformers and voltage‑transformer VT units.
Automatic tap‑position matching & identification workflow
Input transformer nameplate voltage data plus regulation percentage. The device compares measured ratio figures against theoretical values for each tap. It pinpoints which tap‑position delivers minimal error and outputs identified tap‑number in report. This helps catch mechanical offset or mis‑position of on‑load tap‑changer without extra manual lookup across tap tables.
Timestamp‑attached record keeping for audit‑compliant deliverables
Up to 200 complete datasets are stored locally. Each dataset keeps: test‑mode (IEC/IEEE), winding‑connection type, detected tap‑position, ratio error, vector‑group number, phase‑angle, excitation‑current plus system real‑time timestamp. Operators can print hard‑copy report on‑spot via built‑in thermal printer. Use USB interface to transfer full datasets toward PC, supporting editable Word report generation for submission to asset‑management or third‑party inspection bodies. No more hand‑written paper log with missing context.
Broad winding‑configuration compatibility with clear pre‑test check logic
Supports DY, YD, DD, YY, ZN three‑phase transformers and single‑phase units. Before formal voltage ramp‑up, instrument runs quick pre‑check to detect reversed‑phase connection. If reversed‑wiring situation is spotted, measurement aborts early, preventing invalid test data caused by swapped high‑voltage / low‑voltage test leads.
Touch‑screen guided operation with field‑proof hardware
7‑inch touch‑screen GUI arranges parameters following real‑world test workflow: select connection form, pick calculation‑standard, input nameplate rating, then start measurement. Calibration access is password‑protected to stop unauthorized parameter alteration in field environment. Rugged suitcase chassis weighs less than 10 kg, easy for vehicle transport and site carry‑in.
Technical Specifications
Item | Specification |
|---|---|
Model | GDBC-901B |
Measuring Ratio Range | 1 ~ 10000 |
Ratio Measuring Accuracy | 1‑1000: <0.2%; 1000‑10000: <0.5% |
Repeatability Error | ＜0.05% |
Vector‑Group Detection Range | 1‑12 clock number |
Phase‑Angle Measurement | 0‑360°, error＜0.5° |
Per‑Phase Test‑Output Voltage | AC 0‑120V |
Max Output Current Per‑Phase | 200mA |
Test‑Voltage Distortion Factor | ＜1% |
Excitation‑Current Measuring Range | 0‑200mA; accuracy＜1% |
Supported Transformer Connections | DY, YD, DD, YY, ZN, single‑phase |
Internal Memory | Max. 200 timestamp‑embedded groups |
Power Source | Built‑in 12V 15000mAh lithium‑ion battery |
Charger Input | AC 100‑230V,45‑65Hz |
Dimension(L×W×H) | 400 mm ×350 mm ×200 mm |
Net Weight | ＜10 kg |
Working Ambient | 0℃‑50℃, relative humidity＜90% non‑condensing |
Standard Kit Contents
1 × Red high‑voltage‑side complete test‑cable assembly
1 × GDBC-901B transformer turns‑ratio tester main suitcase unit
1 × Black low‑voltage‑side complete test‑cable assembly
1 × Protective‑earth connection cable
1 × Universal AC‑DC battery‑charger
1 × Thermal printer paper roll set
1 × English‑Chinese operation manual
1 × Factory performance test report
Project‑Focused Q&A
1.Q：Can I run complete TTR tests without AC mains power on‑site?
A: Yes. The built‑in lithium‑ion battery supports over 10‑hours continuous field testing for most normal‑size transformer jobs. For long multi‑transformer inspection rounds, bring the charger for break‑period re‑charge.
2.Q：What is the difference between IEC‑mode and IEEE‑mode inside this tester?
A: IEC 60076 outputs line‑voltage ratio value; IEEE C57.12 calculates winding physical turns‑ratio. You must match setting against your project‑specification requirement. Wrong selected‑standard will produce numbers unsuitable for report submission.
3.Q：How does automatic tap‑position identification function operate?
A: Input transformer nameplate primary / secondary voltage plus tap‑regulation percentage. Instrument compares measured ratio result with theoretical value of every tap‑step, outputs tap‑number giving minimal deviation. It serves as auxiliary judgement; still cross‑check against physical tap‑changer marker on transformer tank.
4.Q：What information is saved inside each stored record?
A: Not only ratio‑error figure. Every entry stores: test‑standard(IEC/IEEE), winding‑connection‑type, identified tap‑position, vector‑group number, phase‑angle, excitation‑current and hardware real‑world timestamp. It eliminates missing‑context risk for audit work.
Contact Us
Contact Person: Christine Gou
Whatsapp/Wechat/Mobile: +86 15123029885
Email: gold05@hy-industry.com