Timepower TP672 Insulating Oil Dielectric Strength Tester
| Brand | Timepower |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | OEM Manufacturer |
| Country of Origin | China |
| Model | TP672 |
| Pricing | Upon Request |
| Dielectric Strength Measurement Range | 0–80 kV |
| Accuracy | ±2% |
| Rise Rate Options | 2.0±0.2 kV/s and 3.0±0.2 kV/s |
| Resolution | 0.01 kV |
| Test Repetition | 1–9 cycles (default 6) |
| Stirring Method | Magnetic stirring |
| Standby Time | 0–59 min (default 15 min) |
| Inter-test Interval | 0–9 min (default 3–5 min) |
| Display | LCD |
| Power Supply | AC 220 V ±10%, 50 Hz ±10% |
| Operating Temperature | 5–40 °C |
| Relative Humidity | ≤85% RH |
| Dimensions | 610 × 410 × 425 mm |
| Weight | 45 kg |
Overview
The Timepower TP672 Insulating Oil Dielectric Strength Tester is an ASTM- and IEC-aligned high-voltage test system engineered for precise determination of the dielectric breakdown voltage (BDV) of transformer oils, turbine oils, and other insulating liquids used in power transmission and distribution equipment. It operates on the principle of controlled AC voltage ramping across a standardized oil gap—per GB/T 507 and DL 429.9—until electrical breakdown occurs, indicating the presence of conductive contaminants such as water, particulates, or oxidation byproducts. The instrument employs a dry-type high-voltage transformer assembly with digitally regulated sinusoidal waveform generation and stepless voltage control, ensuring stable, repeatable, and traceable test conditions essential for compliance-driven laboratories in utilities, grid operators, and ISO/IEC 17025-accredited testing facilities.
Key Features
- Dual-CPU microcontroller architecture for synchronized control of voltage ramping, electrode immersion, magnetic stirring, cup exchange, data acquisition, and thermal management
- Two programmable voltage rise rates: 2.0 ± 0.2 kV/s and 3.0 ± 0.2 kV/s—fully compliant with both IEC 60156 and ASTM D877 test protocols
- Integrated overvoltage and overcurrent protection circuits with automatic zero-return and arc suppression logic to prevent equipment damage and ensure operator safety
- High-resolution 0.01 kV measurement resolution and ±2% full-scale accuracy, validated per national metrological standards
- Configurable test sequence parameters: number of repetitions (1–9), settling time (0–59 min), and inter-test delay (0–9 min)
- Compact dry-type transformer design reduces weight to 45 kg and eliminates oil-filled insulation risks—ideal for mobile field labs and confined substation environments
- Onboard non-volatile memory stores up to 100 test records with timestamp, test number, breakdown voltage, and pass/fail status
Sample Compatibility & Compliance
The TP672 is optimized for routine testing of mineral-based and synthetic insulating oils meeting IEC 60296, ASTM D3487, and GB 2536 specifications. Its standard test cell conforms to the 2.5 mm spherical electrode geometry defined in IEC 60156 and GB/T 507, ensuring cross-laboratory reproducibility. The system supports manual and semi-automated cup handling with three included test cups, enabling sequential multi-sample evaluation without recalibration. All electrical safety functions comply with IEC 61010-1:2010 (Measurement Category II, Pollution Degree 2), and its electromagnetic compatibility meets EN 61326-1:2013. For quality-critical applications, the device supports GLP/GMP-aligned audit trails when paired with optional PC-based reporting software.
Software & Data Management
While the TP672 operates autonomously via its front-panel LCD interface, it includes RS-232 serial output for integration with laboratory information management systems (LIMS) or custom QA/QC databases. Test results—including breakdown voltage, cycle count, ambient temperature/humidity logs, and operator ID fields—can be exported in CSV format for statistical process control (SPC) analysis. Optional Windows-compatible software provides FDA 21 CFR Part 11-compliant electronic signatures, user-level access controls, and automated report generation aligned with ISO/IEC 17025 clause 7.8 requirements. All stored data retain full traceability to calibration certificates and maintenance logs.
Applications
- Routine acceptance testing of new transformer oil prior to commissioning
- Periodic condition monitoring of in-service insulating oil in power transformers, reactors, and circuit breakers
- Root-cause analysis of dielectric failure events in high-voltage assets
- Quality assurance in oil reclamation and regeneration facilities
- Third-party certification testing for ISO 55001 asset management compliance
- Research-grade studies on aging mechanisms, moisture absorption kinetics, and additive depletion profiles
FAQ
What standards does the TP672 comply with?
It fully implements GB/T 507, DL 429.9, IEC 60156, and ASTM D877 for dielectric strength testing of insulating oils.
Can the TP672 be used for silicone or ester-based insulating fluids?
Yes—provided the fluid’s viscosity and density fall within the operational envelope of the standard test cell; users should verify electrode gap stability per IEC TR 62697-2 guidelines.
Is external calibration required before first use?
The unit ships with a factory calibration certificate traceable to CNAS-accredited standards; annual recalibration against NIST-traceable high-voltage dividers is recommended.
Does the system support remote diagnostics or firmware updates?
Firmware upgrades are performed locally via USB-to-serial adapter; remote diagnostics require optional Ethernet module (sold separately).
How is electrode cleaning and maintenance handled?
Electrodes are manually cleaned using lint-free cloths and analytical-grade isopropanol; the system includes a dedicated cleaning protocol accessible via service mode.
