TimePower TP572 Insulating Oil Dielectric Strength Tester
| Brand | TimePower |
|---|---|
| Model | TP572 |
| Origin | Beijing, China |
| Manufacturer | TimePower (Domestic) |
| Voltage Ramp Rate | 2.0–3.02 kV/s adjustable |
| Accuracy | ±2% |
| Measurement Range | 0–80 kV |
| Resolution | 0.01 kV |
| Test Repetition | 1–9 cycles (default 6) |
| Electrode Cup | Single-cup ASTM D877/D1816-compliant |
| Stirring Method | Magnetic stirring |
| Standby Time | 0–59 min adjustable (default 15 min) |
| Inter-test Interval | 0–9 min adjustable (default 3–5 min) |
| Power Supply | AC 220 V ±10%, 50 Hz ±10% |
| Operating Temperature | 5–40 °C |
| Relative Humidity | ≤85% RH |
| Dimensions | 460 × 380 × 360 mm |
| Weight | 30 kg |
Overview
The TimePower TP572 Insulating Oil Dielectric Strength Tester is a microprocessor-controlled high-voltage test system engineered for precise determination of the dielectric breakdown voltage of insulating oils used in power transformers, circuit breakers, and other high-voltage electrical equipment. It operates on the principle of controlled AC voltage ramping across standardized electrode geometry (per ASTM D877 and IEC 60156), where the applied sinusoidal voltage increases at a defined linear rate until dielectric failure occurs—marked by a transient current surge exceeding the instrument’s trip threshold. This measurement directly correlates with the oil’s ability to resist electrical stress under service conditions and serves as a critical indicator of contamination by water, particulates, or polar compounds. The TP572 complies with GB/T 507 and DL 429.9 national standards for insulating oil testing in China’s electric power industry, and its design aligns with international practices for routine condition monitoring and preventive maintenance.
Key Features
- Dual-CPU architecture ensures deterministic real-time control of voltage ramping, electrode conditioning, and safety interlocks.
- Programmable ramp rates of 2.0 kV/s and 3.02 kV/s—both traceable to NIST-calibrated reference sources—enable method flexibility per ASTM D1816 (for inhibited oils) and ASTM D877 (for uninhibited oils).
- Integrated magnetic stirrer activates automatically before each test cycle to homogenize suspended contaminants, followed by user-configurable静止 time (0–59 min) to allow particle settling per standard protocols.
- Dry-type high-frequency transformer assembly delivers stable, low-ripple AC output with minimal thermal drift; eliminates oil-filled transformer hazards and reduces maintenance overhead.
- Comprehensive hardware protection: overvoltage cutoff, overcurrent limiting, automatic zero-return after breakdown, and arc-quenching circuitry prevent electrode pitting and ensure repeatability.
- LCD interface supports full-cycle automation—including voltage ramping, stirring, dwell timing, breakdown detection, data logging, and thermal-printed report generation—with no manual intervention required.
Sample Compatibility & Compliance
The TP572 is validated for use with mineral-based, synthetic, and bio-derived insulating oils conforming to ASTM D3487, IEC 60296, and GB 2536 specifications. Its single-cup electrode configuration adheres to the 2.5 mm gap and 25 mm diameter specifications defined in ASTM D877 and IEC 60156. All test sequences follow GLP-aligned procedural controls: mandatory pre-test electrode cleaning verification, ambient humidity/temperature logging, and mandatory post-breakdown oil discard per ISO 4406 particle count thresholds. The instrument meets electromagnetic compatibility (EMC) requirements per IEC 61000-6-3 and electrical safety standards per IEC 61010-1 for laboratory measurement equipment.
Software & Data Management
Test records—including breakdown voltage, ramp rate, stir duration, standby time, and timestamp—are stored internally (non-volatile memory, ≥1,000 entries) with automatic overwrite protection. Data export is supported via RS-232 serial interface to external PCs running compliant LIMS or SCADA systems. Audit trails include operator ID (via optional keypad login), test sequence ID, firmware version, and calibration due date—all retained for ≥12 months. While the TP572 does not implement FDA 21 CFR Part 11 electronic signature functionality natively, its raw data output format (ASCII CSV) is compatible with third-party validation packages supporting ALCOA+ data integrity principles.
Applications
- Routine quality assurance of new insulating oil prior to transformer filling (per IEEE C57.106).
- On-site or lab-based condition assessment of in-service transformer oil during predictive maintenance intervals.
- Research evaluation of additive performance, oxidation stability, and moisture scavenging efficiency.
- Verification of oil reclamation effectiveness following vacuum dehydration or clay filtration processes.
- Compliance testing for grid operators subject to State Grid Corporation of China (SGCC) Q/GDW 11285 and南方电网 (CSG) Q/CSG 1206007 technical specifications.
FAQ
Does the TP572 support dual-electrode cup configurations for parallel testing?
No—the TP572 uses a single standardized test cup per ASTM D877 and IEC 60156 to ensure geometric consistency and minimize inter-cup variability.
Can the ramp rate be calibrated in-house?
Ramp rate calibration requires traceable high-voltage dividers and oscilloscopic validation; users must perform this annually using certified reference equipment or engage TimePower’s authorized service center.
Is the magnetic stirrer speed adjustable?
Stirring intensity is fixed at 300 rpm per GB/T 507; speed adjustment is not provided, as deviation would invalidate compliance with standard test methodology.
What is the recommended electrode cleaning procedure between tests?
Electrodes must be cleaned with anhydrous ethanol, dried with lint-free tissue, and inspected under 10× magnification for pitting or carbon tracking before reuse.
Does the instrument store environmental parameters alongside test results?
Yes—ambient temperature and relative humidity readings (from built-in sensors) are appended to each test record and printed on reports.
