Relay Tester/Secondary Circuit Tester

LQHV-103 CT PT Tester | Protective Relay & Metering Transformer Analyzer

Professional-grade LQHV-103 CT PT tester performs excitation tests, ratio/polarity checks, and error curve analysis for protective & metering transformers, compliant with GB 20840 standards.

US$1.00; Negotiated Price
Lead time: 30days

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Product Details

Product Tags

LQHV-103 CT/PT Comprehensive Test System

The LQHV-103 is an all-in-one field testing solution for current and voltage transformers (CT/PT), combining excitation characterization, ratio verification, and metrological compliance testing in a single portable unit.

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	4. Withstand Test of Power Frequency
5. Current Injecting	5. Degauss
6. Degauss	6. Calculation of Knee Point Value
7. Withstand Test of Power Frequency Alternating Current
8. Automatic Calculation of Excitation Knee Point Value

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 Output 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
Error	≤0.5%(0.2%Reading+0.3%Range)
Operating Temperature	-10℃~+40℃
Relative Humidity	<90RH%
Altitude	≤1000m
Overall Dimension(LengthWidthHeight)	450280260(mm)
Weight	≤30Kg

Product Highlights

1. Intelligent Field Testing

Single-unit operation: No external devices required
Auto-diagnosis: Identifies saturation points (knee-point voltage)
Graphical interface: 7" LCD with touch-assisted controls

2. Advanced Data Management

3,000 test records with flash storage
USB export for Word/Excel reports
Built-in thermal printer for instant results

3. Rugged Portability

22kg lightweight design
IP52 protection rating
-10°C to 50°C operating range

Typical Applications

Substation Maintenance

Periodic verification of protection-class CTs

Metering Validation

Accuracy testing for revenue-grade PTs

Manufacturing QC

Production-line transformer testing

Testing Workflow

Connect test leads to transformer secondary
Select test mode (excitation/ratio/error curve)
Initiate automated test sequence
Review results on-screen or print directly
Save data to USB for further analysis

Technical Advantages

Dual-mode excitation: Tests both CTs and PTs without reconfiguration
Smart demagnetization: Prepares transformers for accurate testing
Safety features: Overcurrent/overvoltage protection circuits

Engineered for utility crews, testing laboratories, and industrial maintenance teams, the LQHV-103 delivers laboratory-grade accuracy in field conditions, significantly reducing transformer testing time while ensuring regulatory compliance.

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