GuanCe Instruments GCSTD-CII2 Power Frequency Dielectric Constant and Dissipation Factor Analyzer
| Brand | GuanCe Instruments |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Region of Manufacture | Domestic (China) |
| Model | GCSTD-CII2 |
| Price | USD 1,150 (FOB Beijing) |
| Standard Compliance | GB/T 1409–2006, GB/T 5654–2007, GB/T 21216–2007, GB/T 1693–2007, GB/T 5594.4–1985 |
| Operating Frequency | 45–65 Hz (Auto-Tuned to 50 Hz Nominal) |
| Measurement Modes | Direct Connection, Reverse Connection, External HV Source Mode |
| Output Voltage Range | 2.5 kV, 5 kV, 10 kV (5-step adjustable, integrated HV generator) |
| tanδ Range | 0.00%–99.9%, Resolution: 0.01%, Accuracy: ±(1% × reading + 0.09%) |
| Cx Range | 30 pF–0.3 µF (internal HV), Resolution: 0.1 pF, Accuracy: ±(1.5% × reading + 1 pF) |
| Input Power | 220 V ±10%, 50 Hz, 1.5 kVA |
| Dimensions (L×W×H) | 470 × 320 × 360 mm |
| Weight | 16 kg |
| Ambient Temp | 10–30 °C |
| Relative Humidity | 20–80% RH |
| Display | Large LCD with Chinese menu interface |
Overview
The GuanCe Instruments GCSTD-CII2 Power Frequency Dielectric Constant and Dissipation Factor Analyzer is an integrated, microprocessor-controlled test system engineered for precise determination of dielectric permittivity (εr) and loss tangent (tan δ) in solid, liquid, and composite insulating materials under power frequency conditions (45–65 Hz, auto-tuned to 50 Hz nominal). It operates on the principle of high-voltage bridge measurement using a Schering-type configuration, where phase-sensitive detection isolates capacitive reactance from resistive loss components in the test specimen. Designed specifically for compliance-driven quality control and routine diagnostics in electrical insulation laboratories, the GCSTD-CII2 supports standardized evaluation of dielectric performance per multiple national standards—including GB/T 1409–2006 (solid insulators), GB/T 5654–2007 (insulating oils), GB/T 21216–2007 (liquid conductivity and capacitance-derived tan δ), GB/T 1693–2007 (vulcanized rubber), and GB/T 5594.4–1985 (ceramic dielectrics for electronic components). Its embedded high-voltage generator (2.5–10 kV, five-step selectable), internal reference capacitor, and adaptive frequency rejection architecture eliminate dependency on external HV sources while maintaining robust immunity to ambient electromagnetic interference—critical for field-deployable or substation-adjacent testing environments.
Key Features
- Integrated high-voltage generation (2.5 kV / 5 kV / 10 kV) with overcurrent protection and arc suppression logic to safeguard instrument integrity during specimen breakdown or short-circuit events.
- Auto-tuning digital frequency synthesis that dynamically rejects 50 Hz fundamental and harmonic interference—enabling stable measurements even in electrically noisy industrial or utility substations.
- Triple measurement mode support: direct connection (for grounded specimens), reverse connection (for ungrounded or shielded systems), and external HV source coupling (for integration with legacy test transformers).
- High-resolution display with intuitive Chinese-language menu navigation—no external PC required for setup, execution, or result review; real-time parameter feedback and pass/fail indicators simplify operator workflow.
- Internal 6-digit A/D conversion engine with 0.01% tan δ resolution and 0.1 pF capacitance resolution—ensuring repeatability compliant with GB/T 5654–2007 oil testing requirements when used with standard ASTM D924-compatible oil test cells.
- Compact, self-contained benchtop design (470 × 320 × 360 mm, 16 kg) optimized for lab mobility and on-site deployment without auxiliary cooling, vacuum, or gas supply systems.
Sample Compatibility & Compliance
The GCSTD-CII2 accommodates a broad range of dielectric specimens per standardized geometries: solid discs (Ø38 mm, Ø50 mm, Ø100 mm), liquid samples in IEC 60247-compliant oil cups, and high-voltage apparatus including bushings, current/voltage transformers, power cables, and capacitor windings. All measurements adhere to traceable metrological principles aligned with ISO/IEC 17025–2017 general requirements for testing laboratories. While the instrument itself does not carry CE or UL certification, its measurement methodology and uncertainty budget are fully compatible with GLP and GMP documentation frameworks—particularly when paired with calibrated reference standards and audit-ready test logs. Data outputs meet minimum requirements for inclusion in regulatory submissions under China’s NMPA Class II medical device insulation verification protocols and State Grid Corporation of China (SGCC) Q/GDW 1168–2013 condition assessment guidelines.
Software & Data Management
The GCSTD-CII2 operates as a standalone unit with no proprietary software dependency. All measurement parameters, raw phase-angle data, and calculated εr/tan δ values are stored internally in non-volatile memory (up to 200 test records) and exportable via RS-232 serial interface to external PCs running generic terminal emulation or custom CSV-logging applications. Each record includes timestamp, test voltage level, connection mode, ambient temperature/humidity metadata, and operator ID field (manually entered). Though native firmware does not implement FDA 21 CFR Part 11 electronic signature or audit-trail functionality, the device supports manual documentation workflows consistent with ISO 9001:2015 clause 8.5.2 (identification and traceability) and IEC 61000-4-30 Class A power quality recording conventions. Optional third-party LabVIEW or Python-based data acquisition modules can be developed to extend traceability and integrate into LIMS environments.
Applications
- Routine quality assurance of transformer insulating oil per GB/T 5654–2007 and ASTM D924–22.
- Diagnostics of aging in solid insulation systems (e.g., epoxy resin bushings, paper-oil composites) via trending of tan δ vs. voltage and temperature.
- Verification of ceramic capacitor dielectrics (Al2O3, TiO2, BaTiO3) per GB/T 5594.4–1985 for electronic component manufacturers.
- Batch testing of silicone rubber housing materials for outdoor insulators per GB/T 1693–2007.
- Commissioning and maintenance testing of high-voltage cable terminations and GIS spacers.
- Research-grade permittivity profiling of novel nanocomposite insulators under controlled thermal and humidity conditions.
FAQ
Does the GCSTD-CII2 comply with international standards such as IEC 60270 or ASTM D150?
The instrument implements measurement principles consistent with IEC 60270 (partial discharge-free HV bridge operation) and ASTM D150 (dielectric constant and dissipation factor of solid electrical insulating materials), though formal certification to those standards is not claimed. Its calibration traceability and uncertainty profile support equivalency assessments per ISO/IEC 17025.
Can it measure low-loss materials with tan δ < 0.001%?
No—the instrument’s specified resolution is 0.01% tan δ, making it suitable for routine industrial insulation assessment but not for ultra-low-loss research applications such as fused quartz or sapphire characterization.
Is external calibration required before first use?
Yes. Users must perform initial verification using a certified reference capacitor (e.g., NIST-traceable 100 pF ±0.05%) and verify HV output accuracy with a calibrated high-voltage divider prior to acceptance testing.
What sample electrode configurations are supported beyond the standard disc sizes?
The system accepts custom electrodes via its universal BNC and HV banana-jack terminals; however, geometric correction factors for non-standard configurations must be applied manually during post-processing per GB/T 1409–2006 Annex B.
Is firmware upgrade capability available?
Firmware updates are delivered via RS-232 using GuanCe’s authorized service utility; no field-upgradable bootloader is exposed to end users. Version history and update logs are maintained per ISO 9001 document control procedures.
