Current Transformer (CT) analyzer UHV-109A

Potential/Voltage Transformer (PT)for electrical networksresistance

Product Introduction
The UHV-109A CT/PT Turns Ratio Tester is a portable, standalone instrument for automatic verification and measurement of current transformers (CT) and potential transformers (PT) in laboratory and on-site environments. The CT/PT Turns Ratio Tester integrates automatic inflection-point detection, standard-compliant reporting and extensive local storage, enabling fast, accurate verification and one-click Word report export via USB while significantly reducing commissioning time.

Product Features of CT PT Tester

• Supports CT and PT detection and turns-ratio measurement
• Compliant with GB 20840.3-2013 and GB 20840.2-2014 (IEC referenced)
• Standalone operation—no external equipment required
• Built-in fast thermal printer for instant on-site reports
• User-friendly intelligent controller with large graphical LCD
• Automatic calculation/detection of CT/PT excitation (turning) point
• Automatic generation of 5% and 10% error curves
• Stores over 3000 test records with power-off data protection
• USB data transfer and PC-compatible one-click Word report generation
• Portable design (weight ≤ 22 kg) optimized for field testing

Technical specifications

• Power supply: AC 220V ±10%, 50Hz
• Device output: 0 ~ 2500 Vrms, 5 kVA (maximum set value 20 A)
• High current output: 0 ~ 1000 A
• Excitation precision: ≤ 0.5% (0.2% * read + 0.3% * range)
• Secondary winding resistance measurement:
• Range: 0.1 ~ 300 Ω
• Precision: ≤ 0.5% (0.2% * read + 0.3% * range)
• Secondary actual load measurement:
• Range: 5 ~ 500 VA
• Precision: ≤ 0.5% (0.2% * read + 0.3% * range) ± 0.1 VA
• Phase (angle difference) measurement:
• Precision: 4 min
• Resolution: 0.1 min
• Ratio error precision: 0.05%
• CT turns-ratio measurement:
• Range: ≤ 25000 A/5 A (5000 A/1 A)
• Precision: ≤ 0.5%
• PT turns-ratio measurement:
• Range: ≤ 500 kV
• Precision: ≤ 0.5%
• Working conditions: Temperature −10°C ~ 40°C; Humidity ≤ 90%; Altitude ≤ 1000 m
• Size: 410 mm × 260 mm × 340 mm
• Weight: ≤ 22 kg

Maintenance Precautions of CT PT Tester

• 1. Avoid prolonged use: Long term use of the transformer tester can cause the instrument to heat up, affecting testing accuracy and instrument lifespan. Therefore, prolonged continuous use should be avoided during use, and appropriate rest and cooling should be taken.
• 2. Avoid overload: The transformer tester should avoid overload during use to prevent damage to the instrument and the tested equipment. Before testing, it is necessary to understand the rated value of the tested equipment and the measurement range of the tester to avoid using beyond the range.
• 3. Avoid high temperature environment: The transformer tester should avoid being placed in a high temperature environment for a long time to avoid affecting the lifespan and testing accuracy of the instrument. When used in high temperature environments, appropriate cooling and ventilation should be provided.
• 4. Avoid high humidity: The transformer tester should avoid being placed in an environment with high humidity for a long time to avoid affecting the lifespan and testing accuracy of the instrument. When used in environments with high humidity, it should be appropriately dried and ventilated.

FAQ for CT PT Analyzer

• Q: What types of transformers can this CT PT Analyzer test?
• A: This CT PT Analyzer is suitable for comprehensive testing of current transformers (CT) and voltage transformers (PT), and can be widely used in power systems, substations, equipment manufacturers, testing institutions, and power engineering companies.

• Q: Does the CT PT Analyzer support automatic testing?
• A: Support fully automated testing mode. Users only need to connect the transformer according to the wiring diagram, and the instrument can automatically complete testing, data acquisition, curve drawing, and result analysis, reducing human errors.

• Q: Is the CT PT Analyzer suitable for on-site substation testing?
• A: Very suitable. The CT PT Analyzer adopts a portable design, which has the advantages of light weight, easy portability, strong anti-interference ability, and can adapt to complex on-site environments. Specially suitable for on-site inspection and preventive testing in substations.

• Q: Do you have rich export experience?
• A: Yes, it is. Our CT PT Analyzer has been exported to multiple countries and regions. We are familiar with the requirements of international power projects and can provide English operation manuals, calibration certificates, technical training, and professional export packaging to help customers successfully complete equipment acceptance and long-term use.