Relay Tester/Secondary Circuit Tester
LQHV-103A Intelligent CT/PT Field Test System
All-in-one solution for protection-class and metering transformer verification with automatic error curve generation and field reporting capabilities.
Product Parameters
Function Table
| I. Current Transformer (CT) | II. Voltage Transformer (PT) |
| 1. Magnetization Curve | 1. Excitation Characteristic Test |
| 2. Transformation Ratio Test | 2. Transformation Ratio Test |
| 3. Polarity | 3. Polarity |
| 4. 5％ and 10％ error curve,ALF | 4. Withstand Test of Power Frequency |
| 5. Current Injecting | 5. Resistance Test |
| 6. FAST TEST | 6. Calculation of Knee Point Value |
| 7. Withstand Test of Power Frequency Alternating Current | 7. Actual Secondary Load Test |
| 8. Automatic Calculation of Excitation Knee Point Value | |
| 9. Actual Secondary Load Test | |
| 10. Resistance Test |
Technical Parameter Table
| Major Technical Parameters | |
| Operational Power Supply | AC220V±20V, 50～60Hz |
| Equipment Power Supply Output Waveform | Sine Wave |
| Single Machine Output Voltage of Excitation Characteristic | 0~1200V |
| Excitation Current Set | 0~20A |
| Single Machine Output Current of Transformation Ratio Test | 0~600A |
| CT ratio measurement range | 5~25000A/5A(5000A/1A) |
| PT ratio measurement range | 1~500KV |
| Load Range | 5~500VA |
| Resistance measurement range | 0.1~300Ω |
| Error | ≤0.5%(0.3%*Reading+0.2%*Range) |
| Operating Temperature | -10℃~+40℃ |
| Relative Humidity | <90RH% |
| Altitude | ≤1000m |
| Overall Dimension(Length*Width*Height) | 450*350*350(mm) |
| Weight | ≤28Kg |
Key Features
① Dual-Mode Testing
Simultaneous CT & PT analysis without reconfiguration
② Smart Curve Generation
Automatic 5%/10% error curves with knee-point detection
③ Field Reporting
Built-in thermal printer + USB export to Word/Excel
④ Regulatory Compliance
Meets GB 20840.2-2014, IEC 61869-1 standards
Workflow Efficiency
One-Touch Setup: Automatic wire detection
Parallel Testing: Run multiple test sequences simultaneously
Data Management: Store 3000+ tests with power-loss protection
Results Delivery: Print or export via USB 2.0
Technical Specifications
Display: 7" color LCD with touch interface
Printer: 58mm thermal, 30 lines/second
Storage: 8GB flash (expandable via USB)
Power: AC 220V±15% / 50Hz
Dimensions: 320×280×150mm
Weight: 21.5kg (field-portable)
Typical Applications
Substation Maintenance
Routine testing of protection CTs
Metering Validation
Accuracy verification for billing transformers
Manufacturing QC
Production line transformer testing
Standards Compliance
GB 20840.2-2014 (PT)
GB 20840.3-2013 (CT)
IEC 61869-1
DL/T 726-2013
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