Refine On (Hebei) Electric Power Technology Co., Ltd. is one of the leading manufacturers and suppliers of instrument transformer comprehensive tester in China. If you're going to wholesale durable instrument transformer comprehensive tester, welcome to get quotation from our factory. All customized products are with high quality and competitive price.
The NRHG902 Instrument Transformer Comprehensive Tester, manufactured by Refine On (Hebei) Electric Power Technology Co., Ltd., delivers automated characterization of protection and metering class CTs and PTs. The unit integrates DC resistance, excitation characteristics, ratio, polarity, burden, and error measurement into a portable device weighing less than 9 kg, with internal storage for 2000 test records and USB export for PC-based analysis. The company holds ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certifications.
Product Parameters
|
Parameter |
Specification |
|
Usage |
Class P/TP CT & VT |
|
Output |
0–180 Vrms, 12 Arms, 36 A (peak) |
|
Voltage measurement accuracy |
±0.2% |
|
CT ratio range |
1–40000 |
|
CT ratio accuracy |
±0.2% |
|
PT ratio range |
1–40000 |
|
PT ratio accuracy |
±0.2% |
|
Phase measurement range |
±5 min |
|
Phase measurement accuracy |
0.5 min |
|
DC resistance range |
0–300 Ω |
|
DC resistance accuracy |
2% ± 2 mΩ |
|
Burden range |
0–300 VA |
|
Burden accuracy |
2% ± 0.2 VA |
|
Power supply |
AC 220 V ±10%, 50 Hz |
|
Operating temperature |
–10°C to +50°C |
|
Humidity |
≤90% |
|
Dimensions (tester) |
340 mm × 220 mm × 330 mm |
|
Weight |
<9 kg |
|
Aluminum alloy case dimensions |
430 mm × 270 mm × 500 mm |
Key Advantages
- CT ratio measurement range up to 40000 with ±0.2% accuracy, suitable for high-ratio transformer testing
- Phase measurement resolution of 0.5 min enables precise angular error evaluation for protection relays
- Low-frequency excitation method reduces required test voltage to <20 V for knee voltages up to 30 kV
- Internal storage for 2000 test sets with USB export to PC and Word report generation
- Weight <9 kg facilitates field transport without performance compromise
- ISO 9001, ISO 14001, and ISO 45001 certified manufacturing processes
Applications
- Commissioning and maintenance of CTs and PTs in substations
- Protection class CT (P, TPY, TPX, TPZ) performance verification
- Metering class CT accuracy assessment (ratio/phase error)
- Transformer bushing CT and GIS embedded CT testing
- Secondary burden and winding resistance measurement
Related Products
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Frequently Asked Questions (FAQ)
Q1: What types of transformers can the NRHG902 test?
A1: The NRHG902 Instrument Transformer Comprehensive Tester supports all common CT classes (P, TPY, metering, PR, PX, TPS, TPX, TPZ) and PT class P.
Q2: Does the tester require high-voltage input for excitation tests?
A2: No. Using the low-frequency method, it outputs max 180 Vrms to test CTs with knee voltage up to 30 kV, ensuring operator safety.
Q3: How are test results exported?
A3: Results can be saved internally (2000 records), exported via USB flash drive to PC, and converted into Word reports using the supplied PC software.
Q4: What certifications does the manufacturer hold?
A4: Refine On (Hebei) Electric Power Technology Co., Ltd. is certified to ISO 9001:2015 (Quality), ISO 14001:2015 (Environment), and ISO 45001:2018 (Occupational Health and Safety).
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