CT PT Analyzer (Transformer Comprehensive Characteristic Tester)|
XHTX206
The XHTX206 transformer comprehensive characteristic tester is a
new-generation revolutionary CT and PT testing instrument developed
on the basis of traditional transformer VA characteristic, ratio
and polarity testers that rely on voltage regulators, boosters and
current boosters. Adopting a high-performance DSP and FPGA with
advanced manufacturing technology, the instrument ensures stable
and reliable performance, complete functions, high automation and
high testing efficiency. It is a professional testing instrument
for instrument transformers in the electric power industry.
Applications & Target Audience: Engineered for electric power utilities, metering departments,
transformer manufacturers, and relay protection testing teams that
perform on-site verification of current transformers (CT) and
voltage transformers (PT).
Key Features
- Complete functions: tests excitation (VA) characteristics, ratio,
polarity, secondary winding resistance, secondary load, ratio error
and phase error of CTs (protection, metering, TP class), as well as
excitation, ratio, polarity, secondary resistance and ratio error
of PT electromagnetic units.
- On-site CT verification without standard CT, current booster, load
box, voltage regulating control box or heavy high-current cables,
greatly reducing workload and improving efficiency.
- Accurate ratio and phase measurement: maximum permissible ratio
error ±0.1%, maximum permissible phase error ±5min, enabling
on-site testing of 0.2S class CTs with a CT ratio measurement range
of 1 to 40000.
- With the optional dedicated current booster, outputs 180A current
for convenient on-site current flow testing.
- Advanced frequency conversion method tests CT/PT VA characteristic
curves and 10% error curves; outputs only up to 180V AC and 12Arms
(36A peak), yet handles CTs with knee point up to 60kV.
- Automatically outputs knee point voltage/current, 10% (5%) error
curves, accurate limit factor (ALF), instrument security factor
(FS), secondary time constant (Ts), remanence factor (Kr),
saturation and unsaturated inductance.
- Tests comply with GB1208 (IEC60044-1), GB16847 (IEC60044-6), GB1207
and other instrument transformer standards, with automatic standard
selection by transformer type and class.
- One-key CT resistance, excitation, ratio and polarity test with the
same wiring for all CT tests except load testing.
- 5.7-inch graphic transflective LCD, clearly visible in sunlight;
rotary optical mouse operation; built-in printer for automatic test
report printing; stores 1000 groups of test data without loss after
power-off.
Technical Specifications
Main Unit
| Parameter | Specification |
|---|
| Test Purpose | CT, PT |
| Output | 0 ~ 180Vrms, 12Arms, 36A (peak) |
| Voltage Measurement Accuracy | ±0.2% |
| CT Ratio Measurement Range | 1 ~ 40000 |
| CT Ratio Accuracy | 1~2000: <0.1%; 2000~5000: <0.2%; 5000~35000: <0.5% |
| PT Ratio Measurement Range | 1 ~ 35000 |
| PT Ratio Accuracy | 1~2000: <0.1%; 2000~5000: <0.2%; 5000~35000: <0.5% |
| Phase Measurement | Accuracy ±5min, resolution 0.5min |
| Secondary Winding Resistance | 0 ~ 600Ω, accuracy <0.5%±2mΩ |
| AC Load Measurement | 0 ~ 1000VA, accuracy <0.5%±0.02VA |
| Input Power Supply | AC220V ±10%, 50Hz |
| Working Environment | -10 °C ~ 50 °C, humidity ≤90% |
| Dimensions / Weight | 365 × 290 × 153 mm / <10kg |
Optional Current Booster
| Parameter | Specification |
|---|
| Test Purpose | Current flow test |
| Input | 0 ~ 180VAC |
| Current Output | 0 ~ 180A, accuracy <0.2% |
| Working Environment | -10 °C ~ 50 °C, humidity ≤90% |
| Dimensions / Weight | 200 × 150 × 170 mm / <5kg |
FAQ
Q1: Who is this CT PT analyzer designed for?
It is designed for electric power utilities, metering departments,
transformer manufacturers, and relay protection testing teams that
perform on-site verification of current transformers and voltage
transformers.
Q2: What tests can it perform on CT and PT?
It tests excitation (VA) characteristics, ratio, polarity,
secondary winding resistance, secondary load, ratio error and phase
error of CTs (protection, metering, TP class), and excitation,
ratio, polarity, secondary resistance and ratio error of PT
electromagnetic units.
Q3: What accuracy does it offer?
It offers a maximum permissible ratio error of ±0.1%, maximum
permissible phase error of ±5min, and voltage measurement accuracy
of ±0.2%, enabling field testing of 0.2S class CTs with a CT ratio
range of 1 to 40000.
Q4: How does it handle high knee-point CTs with low output?
Based on the frequency conversion method, it outputs only up to
180V AC and 12Arms (36A peak) yet handles CTs with knee point up to
60kV, automatically deriving knee point voltage, 10% (5%) error
curve, ALF, FS and other parameters.
Q5: What makes it different from a conventional CT PT tester?
Unlike conventional testers that require standard CTs, current
boosters, load boxes and regulator boxes, it completes CT
resistance, excitation, ratio and polarity tests with one key and
the same wiring, featuring a 5.7-inch sunlight-visible LCD,
built-in printer and 1000-group data storage.
Frequency Conversion Excitation Characteristics Digital CT PT Analyzer for Transformer
