Transformer Testing Instrument
LHV-311 Sweep Frequency Response Analyzer: Advanced Transformer Winding Diagnostics
The LHV-311 Sweep Frequency Response Analyzer is a cutting-edge instrument for detecting internal faults in power transformers (63kV-500kV) using Frequency Response Analysis (FRA) methodology compliant with DL/T 911-2016 standards. This non-destructive testing solution identifies winding deformations without transformer disassembly.
Core Technology Specifications
DDS Digital High-Speed Sweep Technology for precise detection of:
Winding twisting/bulging
Radial displacement & axial tilt
Interturn/interphase short circuits
Dual-Channel 16-bit A/D Sampling (99.5% measurement repeatability)
1MHz Linear Sweep Capacity with adjustable intervals (0.25kHz/0.5kHz/1kHz)
Key Functional Advantages
1. Intelligent Measurement Modes
Supports both linear sweep and segmented sweep measurements, accommodating different technical approaches in the field.
2. Simplified Field Operation
Requires only bushing disconnection - no need for:
Transformer lifting
Oil drainage
Core dismantling
3. Automated Diagnostics
Features include:
Software-controlled signal amplitude (±10V peak)
Auto-sampling frequency adjustment
6-curve simultaneous comparison
AI-powered deformation analysis
Product Parameters
Technical parameter
| Linear sweep frequency measurement range | (1kHz)～(1MHz) |
| Segment sweep frequency measurement range | (0.5kHz)～(1kHz) |
| (0.5kHz)～(10kHz) | |
| (10kHz)～(100kHz) | |
| (100kHz)～(500kHz) | |
| (500kHz)～(1000kHz) | |
| Range of amplitude | (-100dB)～(+20dB) |
| Accuracy of amplitude measurement | +20dB～-60dB;±1dB |
| -60dB～-100dB;±2dB | |
| Sweep accuray | 0.01% |
| signal input impedance | 1MΩ |
| signal output impedance | 50Ω |
| In phase test repetition rate | 99.5% |
| Measuring instrument size (L × W × H) | 300×340×120mm3 |
| Instrument aluminum alloy packing box size (L × W × H) | 310×400×330mm3 |
| Weight | 10kg |
Reporting Features:
Automatic Word report generation
Color printing capability
Environmental parameter logging
Historical curve database
Application Scenarios
Post-short-circuit incident inspections
Transportation damage assessments
Preventive maintenance programs
Factory acceptance testing (FAT)
This transformer winding deformation tester combines precision hardware with intelligent software to deliver reliable diagnostics for critical power infrastructure.
