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XHYS101 Insulating Oil Dielectric Loss Tester is a specialized high-precision instrument engineered for comprehensive characterization of insulating fluids used in electrical power equipment. It accurately measures three critical oil quality parameters — dielectric loss factor (tan δ, OTD/DDF), relative permittivity, and DC volume resistivity — providing a complete dielectric profile that goes far beyond simple breakdown voltage testing. Integrating advanced single-chip microcomputer technology, the instrument achieves fully unattended automation of the entire test workflow: temperature ramp-up, precise temperature maintenance, high-precision data sampling, mathematical computation, real-time result display, report printing, and long-term data storage. With AC test voltage up to 2200V and temperature control from 40℃ to 120℃, the XHYS101 is the definitive diagnostic tool for transformer oil condition assessment, aging analysis, and contamination detection.
Technical Specifications
Parameter
Specification
Measured Parameters
Capacitance Range
5 pF – 200 pF
Relative Permittivity Range
1.000 – 30.000
Dielectric Loss Factor (Tan δ) Range
0.00001 – 100
DC Resistivity Range
2.5 MΩ·m – 20 TΩ·m
Measurement Accuracy
Relative Permittivity
±(1–10)% of reading
Dielectric Loss Factor
±(5% of reading ± 0.0002)
DC Resistivity
±10% of reading
Resolution
Capacitance
0.01 pF
Relative Permittivity
0.001
Dielectric Loss Factor
0.00001
Test Voltage & Temperature
AC Test Voltage
200 – 2200V, continuously adjustable, 50 Hz
DC Test Voltage
0 – 500V, continuously adjustable
Temperature Range
40–120℃
Temperature Accuracy
±0.5℃
Power & Supply
Power Supply Voltage
AC 220V ± 10%
Power Supply Frequency
50 Hz / 60 Hz ± 1%
Power Consumption
500 W
Key Performance Features
Complete Dielectric Profile Analysis — Measures all three critical oil quality parameters in a single automated test run: dielectric loss factor (tan δ / OTD / DDF), relative permittivity, and DC volume resistivity. This comprehensive dataset enables assessment of oil aging, contamination by polar compounds, moisture ingress, and conductive particle content — far beyond what a simple BDV test can reveal.
Fully Unattended Automation — Integrated single-chip microcomputer controls the entire workflow automatically: temperature ramp-up to target, precision thermal maintenance at setpoint, high-resolution data sampling, real-time computation, and results output.
Wide-Range Temperature Control — Precision heating from 40℃ to 120℃ with ±0.5℃ accuracy enables temperature-dependent dielectric characterization. Measuring tan δ at elevated temperatures reveals oil degradation that may not be apparent at ambient temperature.
Dual AC/DC Test Voltage — Continuously adjustable AC output (200–2200V, 50Hz) for dielectric loss and permittivity measurement, plus DC output (0–500V) for volume resistivity determination.
Ultra-Wide Resistivity Measurement — DC resistivity range from 2.5 MΩ·m to 20 TΩ·m covers the full spectrum from heavily contaminated oil to pristine insulating fluid.
High-Resolution LCD Touchscreen — Large TFT LCD display with touch interface provides clear visualization of measurement data and diagnostic results, with built-in data storage for long-term trending.
Product Image
Troubleshooting Guide
Issue A: "Electrode cup short circuit" displayed Check if the positioning grooves of the inner and outer electrodes are aligned, and verify that the inner electrode is not loose. The main cause is typically a loose inner electrode.
Issue B: "Please perform Empty Cup Calibration" displayed Required when the empty cup capacitance is outside 60±5 pF. Possible causes: (a) electrodes improperly placed; (b) oil cup not clean — impurities between electrodes require thorough cleaning.
Issue C: Buzzer sounds 5 times and instrument returns to power-on interface (a) Verify empty cup capacitance is within 60±5 pF range. (b) Check that the oil cup is properly positioned and no discharge is occurring.
Issue D: DC resistivity electrochemical time remains fixed at 60 seconds Verify the instrument's internal clock is running correctly; adjust the clock if necessary.
Issue E: Set voltage parameter's least significant digit is not zero Use the [Decrease] key to lower the set voltage value, then use the [Increase] key to adjust to the desired value.
Frequently Asked Questions
Q1: Is this tester suitable for transformer oil condition monitoring specialists?
Yes, the XHYS101 is the definitive instrument for oil condition monitoring programs that go beyond basic breakdown voltage testing. While a BDV tester only identifies gross contamination, this instrument measures tan δ (dielectric loss factor) and DC resistivity — parameters that reveal early-stage oil degradation from oxidation, thermal stress, and polar contaminant accumulation. Condition monitoring specialists can track these parameters over time to predict remaining oil life and build evidence-based oil replacement budgets.
Q2: Can high-voltage research laboratories use this for material characterization?
Absolutely. Research laboratories developing new insulating fluids — synthetic esters, natural esters, nanofluids, and blended dielectrics — require instruments capable of precise dielectric characterization across temperature. The XHYS101’s 40–120℃ range with ±0.5℃ accuracy and ±5% tan δ precision provides publication-quality data. The DC resistivity measurement up to 20 TΩ·m is particularly valuable for characterizing ultra-pure synthetic fluids used in HVDC applications.
Q3: How does it serve electrical forensic failure analysis firms?
When transformers fail, forensic investigators need to determine root cause — and oil condition is key evidence. The XHYS101 provides quantitative dielectric data: elevated tan δ with low resistivity indicates conductive contamination from arcing; elevated tan δ with normal resistivity suggests oxidation; changes in permittivity may indicate moisture ingress. These measurements, combined with dissolved gas analysis, provide comprehensive forensic evidence for insurance claims and litigation support.
Q4: Is it appropriate for transformer life extension and asset management consultants?
Asset management consultants advising on transformer life extension versus replacement decisions need objective data to justify multi-million-dollar recommendations. The XHYS101’s dielectric loss and resistivity measurements provide the granular oil condition data needed to model remaining useful life. Tan δ trending at elevated temperature reveals insulation paper degradation that correlates with degree of polymerization (DP) — the gold standard for transformer life assessment.
Q5: Can oil reclamation specialists use this to verify treatment effectiveness?
Oil reclamation companies that process used transformer oil through filtration, degassing, and clay treatment need to demonstrate that reclaimed oil meets specification. The XHYS101 provides the complete before-and-after dielectric profile: initial measurement quantifies contamination degree, and post-reclamation measurement verifies restoration to acceptable limits. This documented improvement justifies the reclamation investment and provides quality assurance that reconditioned oil will perform reliably in service.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2013
Total Annual:
1000000-5000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
Xi'an Xu&Hui Electromechanical Technology Co., Ltd. /Xian XZH Electric Power Technology Co., Ltd.
Has found in 2013, located in Xi'an, China. which is a highly experienced team dedicated to developing electrical...
Xi'an Xu&Hui Electromechanical Technology Co., Ltd. /Xian XZH Electric Power Technology Co., Ltd.
Has found in 2013, located in Xi'an, China. which is a highly experienced team dedicated to developing electrical...
