Transformer Testing Instrument
LQHV-341 Tan Delta Tester
Precision Insulation Diagnostics
The LQHV-341 delivers laboratory-grade dielectric analysis with frequency conversion technology for reliable measurements in high-interference environments, essential for:
Transformer insulation assessment
CVT/Capacitor bank evaluation
Insulating oil testing (≥0.01% tan δ)
Product Parameters
Technical parameters
| High voltage output | 0.5~10kV |
| Increasing by 500V for each level, a total of 20 levels, capacity: 1500VA | |
| Accuracy | tgδ: ± (reading * 1.5% + 0.06%) |
| Cx: ± (reading * 1.5% + 5PF) | |
| Resolution | tgδ: 0.001% |
| Cx: 0.001pF | |
| Measuring range | 0.001% <tgδ <100% |
| Internal high pressure | 3PF~<60000PF/10KV |
| 60PF~1uF/0.5KV | |
| External high pressure | 3PF~1.5uF/10KV |
| 60PF~30uF/0.5KV | |
| Power supply | AC 220V ± 10% 50/60 ± 1Hz |
| Measuring method | a.single frequency: 45(45Hz measuring)、50(50Hz measuring)、55(55Hz measuring)、60(60Hz measuring)、65(65Hz measuring) |
| b.different frequency: 50D(45Hz/55Hz measure each time) 60D(55Hz/65Hz measure each time) Automatic frequency conversion | |
| Harmonic adaptation | ≤3% |
| Application condition | -15℃－50℃ Relative humidity<80% |
| Dimension | 460 (L) × 345 (W) × 345 (H) |
| Weight | 35kg |
Advanced Testing Technology
1. Intelligent Anti-Interference
📡 Frequency-hopping technology
⚡ 50kV/μs transient immunity
🔌 Automatic harmonic filtering
2. Comprehensive Test Modes
🔧 GST/UST connection methods
🛢️ Insulating oil test capability
📊 CVT C1/C2 capacitor measurement
3. Microcomputer Automation
🤖 One-button full-sequence testing
📈 Auto-calculation of tan δ & capacitance
🖨️ Direct report generation
Safety Systems
Zero-Cross Switching: Arc-free operation
Multi-Layer Protection:
HV short-circuit protection
CVT overvoltage safeguard
Ground integrity monitoring
Isolated Design: 10kV reinforced insulation
Typical Applications
Utilities: Periodic insulation trending
Manufacturers: Factory acceptance testing
Laboratories: Insulating oil research
Service Teams: Moisture/aging detection
Why Choose LQHV-341?
✅ Interference Immunity - Reliable data in noisy substations
✅ Dual-Purpose Testing - Equipment + insulating oil
✅ Military-Grade Safety - 5-layer protection system
✅ Future-Ready - IEC 60247 compliant
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