HUAC-518A
Touch Screen CT/VT Analyzer
Automatic CT and VT analyzer: excitation, ratio, polarity, winding resistance and burden; knee points up to 60 kV by low-frequency method, under 9 kg.
IEC 61869IEC 60044-1IEC 60044-6
MODEL HUAC-CT-120P
CT/PT Analyzer with Variable Frequency and 50 A Current Source
Variable frequency CT/PT analyzer: excitation, error curves, ratio, polarity, burden and transient parameters, 50 A source, printer, 10,000 results.
- CT tests: excitation curve and knee point, 5 % and 10 % error curves, ratio, polarity, DC resistance, burden, phase and ratio error
- Transient parameters: remanence coefficient, excitation inductance, secondary time constant, transient area factor, peak instantaneous error
- PT tests: excitation, ratio, polarity, secondary DC resistance, burden, power factor, phase and ratio error
- Variable frequency method: equivalent test voltage up to 36 kV
- One-button CT test with automatic nameplate parameter detection
- Built-in 50 A current source for current-method ratio and polarity tests, three channels synchronously
- AC withstand test on secondary windings
- Automatic demagnetisation
- TFT colour touch screen and built-in thermal printer
- 10,000 result sets kept after power-off; export by USB drive
- Portable: ≤ 10 kg, good shock resistance
- English user interface; English operating system available
Overview
The HUAC-CT-120P tests protection and metering current transformers (CTs), potential transformers (PTs) and GIS bushing CTs automatically. Power plants, substations and test laboratories use it for commissioning and routine checks of instrument transformers.
The analyzer uses variable frequency technology: its output of up to 180 V corresponds to an equivalent test voltage of 36 kV, enough to find the knee point of most protection CTs. With one button it runs the CT tests, detects nameplate parameters automatically, draws the excitation curve and the 5 % and 10 % error curves, and calculates the knee point and accuracy limit factor (ALF). For CTs it also reports the remanence coefficient, excitation inductance, secondary time constant, transient area factor and peak instantaneous error; for PTs it measures excitation, ratio, polarity, secondary resistance and burden.
A built-in 50 A current source allows ratio and polarity tests by the current method, with three channels measured synchronously, and the instrument can also run AC withstand tests on secondary windings. Results are shown on a TFT colour touch screen, printed on the built-in thermal printer and stored, up to 10,000 sets kept after power-off, for transfer to a PC by USB drive. The analyzer weighs no more than 10 kg and is built for good shock resistance and a long service life.
See all CT and PT test equipment, or send us your instrument transformer data and we will recommend the right setup.
Technical specifications
| Output | |
|---|---|
| Output | 0 – 180 V rms, 12 A rms or more |
| Equivalent test voltage | 36 kV |
| Built-in current source | 50 A |
| Measurement | |
| Voltage and current accuracy | < 0.5 % |
| Excitation measurement accuracy | < 0.5 % |
| Secondary resistance | 0.01 – 50 Ω, accuracy < 0.5 % |
| Secondary burden | 5 – 1000 VA, accuracy ≤ 1 % |
| Power factor range | 0.1 – 1 |
| Phase angle difference | 0 – 360°, accuracy ±0.05° |
| Ratio difference accuracy | 0.05 % |
| Ratio | 1 – 3000 A, accuracy < 0.1 % |
| General | |
| Data storage | 10,000 result sets, kept after power-off |
| Data export | USB drive |
| Display | TFT colour touch screen |
| Printer | Built-in thermal printer |
| Power supply | AC 220 V ±10 %, 45 – 65 Hz |
| Dimensions (W × D × H) | 380 × 320 × 180 mm |
| Weight | ≤ 10 kg |
| Interface language | English |
| Environment | |
| Operating | -20 – +50 °C, RH ≤ 90 %, altitude ≤ 1000 m |
Specifications may change without notice. Contact us for the latest datasheet.
Applications
Protection and metering CTsPotential transformers (PTs)GIS bushing CTsPower plants, substations and test laboratories
Downloads
The datasheet and user manual for this instrument are sent on request, usually within one business day.
Frequently asked questions
What does the variable frequency method do?
The analyzer tests the CT excitation at a lower frequency, where the core saturates at a lower voltage, and converts the result to rated frequency. Its 180 V output therefore corresponds to an equivalent test voltage of 36 kV.
Can it test ratio and polarity with primary current?
Yes. The built-in 50 A current source injects current for current-method ratio and polarity tests, with three channels measured at the same time.
Which transformers can it test?
Protection and metering CTs, potential transformers (PTs) and GIS bushing CTs.
How are results stored and reported?
Up to 10,000 result sets are kept after power-off. Results can be printed on site on the built-in thermal printer or copied to a PC with a USB drive for reports.
Have another question? Ask our application engineers.
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Related products
Often ordered together
HUAC-4500
Portable CT/VT Ratio and Polarity Tester
Voltage-method CT and VT ratio and polarity tester: CTs up to 25000/5 A, VTs 2.2–220 kV, ±0.2 % of reading, no heavy-current source needed.
JJG 313-2010