Transformer Testing Instrument
LQHV-321 Transformer Capacity Load No-load Tester
Comprehensive Transformer Performance Analysis
The LQHV-321 delivers laboratory-grade precision for field measurements of:
Product Parameters
Main technical parameters
| Capacity measuring range | 30kVA ~ 31500kVA |
| Current measuring range | 0 -100A auto-switch the measurement range |
| Current measurement accuracy | ± (0.2% + 3digits) |
| Voltage measurement range | Line Voltage0-750V;phase voltage 0-450V, auto-switch the measurement range |
| Voltage measurement accuracy | ± (0.2% + 3digits) |
| Insulation resistance | > 100MΩ |
| Leakage current | ＜3.5mA |
| Dielectric strength | the power connection on the chassis can withstand: 1500V External transformer can broaden the scope of measurement instruments |
| Frequency Range | 40 ~ 65Hz, accuracy class 0.2; |
| Power Input | AC220V ± 10% |
Transformer capacity (up to 2500kVA)
No-load current and losses
Short-circuit voltage and load losses
Power quality harmonics (up to 50th order)
Advanced Testing Technology
1. Intelligent Three-Phase Analysis
🔌 Auto-wiring verification with vector diagrams
⚡ Simultaneous voltage/current waveform capture
2. Automatic Correction Systems
🌡️ Temperature compensation (20°C reference)
📈 Waveform distortion adjustment
⚙️ Non-rated voltage/current conversion
3. Extended Measurement Capability
🔗 External CT/PT connections for large units
📊 1/3 current loading tests for 2500kVA transformers
Field-Optimized Features
All-Weather Operation: -10°C to 50°C range
Data Integrity: Flash memory with timestamp
Reporting: Onsite thermal printing
Connectivity: USB data export
Typical Applications
Utility Companies: Distribution transformer evaluation
Manufacturers: Factory acceptance testing
Service Teams: Loss assessment after faults
Energy Audits: Efficiency benchmarking
Why Choose LQHV-321?
✅ Complete Testing: Capacity + losses in one unit
✅ Smart Corrections: 5 automatic adjustment systems
✅ Field Expandable: Works with external CTs/PTs
✅ Data-Rich: Harmonic analysis + vector diagrams
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