ZJC-50E Voltage Breakdown Tester by Zhonghang Shidai
| Brand | Zhonghang Shidai |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic (PRC-Made) |
| Model | ZJC-50E |
| Price Range | USD 2,800 – 15,500 (FOB) |
| Maximum Test Voltage | 50 kV AC/DC |
| Electrical Capacity | 3 kVA |
| Voltage Accuracy (10–100% FS) | ≤ ±2% |
| Ramp Rates | 0.1, 0.2, 0.5, 1.0, 2.0 kV/s |
| Electrode Configurations | Two Ø25 mm × 25 mm electrodes |
| Safety Disconnection Time upon Breakdown | ≤ 0.1 s |
| Dimensions (W×D×H) | 1100 × 800 × 1500 mm |
| Power Supply | AC 220 V, 50/60 Hz, 16 A |
Overview
The ZJC-50E Voltage Breakdown Tester is an industrial-grade dielectric strength testing system engineered for precise determination of the AC and DC voltage breakdown strength and withstand voltage performance of solid insulating materials under standardized power-frequency conditions (50/60 Hz). It operates on the principle of controlled voltage ramping across a defined electrode geometry until electrical breakdown occurs—characterized by a sudden, irreversible loss of dielectric integrity resulting in current surge and arc formation. Compliant with core international test methodologies—including ASTM D149, IEC 60243-1, and GB/T 1408.1–2006—the instrument delivers repeatable, traceable results essential for quality assurance in R&D laboratories, material certification bodies, and production QA/QC departments. Its fully integrated computer-controlled architecture enables real-time monitoring of voltage-time profiles, automatic termination at breakdown, and high-fidelity data capture without operator intervention.
Key Features
- Full-range 0–50 kV AC/DC output with no internal voltage stepping—ensuring continuous resolution across the entire test envelope.
- Dual-mode voltage ramp control: programmable constant-rate rise (0.1–2.0 kV/s) and fixed-voltage hold (dielectric withstand testing).
- Integrated fast-acting overcurrent protection circuitry that de-energizes the high-voltage circuit within ≤100 ms of breakdown detection.
- Modular electrode set conforming to GB/T 1408.1: two Ø25 mm disc electrodes and one Ø75 mm disc electrode with standardized 3 mm edge radius to minimize field distortion.
- Dielectric oil immersion chamber constructed from optically transparent acrylic with sealed gasketing—designed for stable thermal and electrical isolation during prolonged tests.
- Industrial-grade step-motor-driven autotransformer regulation ensures smooth, jitter-free voltage progression and eliminates waveform distortion.
- Embedded signal conditioning electronics with 16-bit ADC resolution and optical isolation for noise-immune analog acquisition.
- Front-panel safety interlock system: dual magnetic door switches disable HV output when either acrylic access door is opened.
Sample Compatibility & Compliance
The ZJC-50E supports standardized evaluation of a broad spectrum of non-conductive solid materials including—but not limited to—electrical varnishes, thermosetting resins, laminated composites (e.g., G10/FR4), ceramic substrates, glass insulators, polymer films (PET, PI, PP), and fiber-reinforced prepregs. Specimens must be flat, homogeneous, and free of voids or surface contaminants per ASTM D149 Section 7 and GB/T 1408.1 Clause 6. Testing is conducted in transformer oil or silicone fluid (dielectric strength ≥35 kV/2.5 mm) to suppress surface flashover and enforce bulk failure mode. The system meets mechanical and electrical safety requirements of IEC 61010-1 (Ed. 3.0) for measurement/control laboratory equipment and incorporates grounding continuity verification per IEC 60364-6. All firmware and software modules are designed to support audit-ready documentation workflows compatible with GLP and ISO/IEC 17025-accredited laboratories.
Software & Data Management
The proprietary Windows-based control application provides intuitive, role-based access to test configuration, real-time visualization, and post-processing functions. Each test session records timestamped voltage, current, time, and status flags at ≥100 Hz sampling rate. Up to five concurrent test curves can be overlaid for comparative analysis, with interactive zoom, coordinate readout, grid toggling, and customizable axis scaling. Raw datasets export natively to CSV and Excel-compatible XLSX formats; curve images save as PNG or PDF. All user actions—including parameter edits, test starts/stops, and data exports—are logged with operator ID and timestamp in an immutable audit trail compliant with FDA 21 CFR Part 11 principles (electronic signatures optional via domain authentication). Data storage paths default to configurable network drives, supporting centralized backup and version-controlled archiving.
Applications
- Qualification of new insulation formulations prior to pilot-scale manufacturing.
- Batch-to-batch consistency verification of sheet molding compounds (SMC) and bulk molding compounds (BMC).
- Accelerated aging studies correlating thermal cycling with dielectric degradation.
- Failure analysis of field-failed insulators through comparative breakdown mapping.
- Validation of coating thickness uniformity effects on through-thickness breakdown resistance.
- Supporting third-party certification submissions to UL, TÜV, and CQC for electrical safety compliance.
FAQ
What standards does the ZJC-50E comply with?
It supports test execution per ASTM D149, IEC 60243-1, and GB/T 1408.1–2006. Full compliance documentation—including calibration certificates and uncertainty budgets—is provided with each unit.
Is the system suitable for DC testing only, or both AC and DC?
Both AC (50/60 Hz) and DC output modes are available and independently selectable via software interface. Output waveform fidelity is verified using calibrated oscilloscope traces per IEC 60060-2.
How is operator safety ensured during high-voltage operation?
Safety layers include: (1) interlocked acrylic enclosure with redundant door sensors, (2) automatic HV discharge sequence triggered before door opening, (3) dedicated grounding stud with <1 Ω earth resistance verification point, and (4) emergency stop button with hardwired cut-off relay.
Can test parameters be exported for external statistical analysis?
Yes. All raw voltage/time/current arrays and summary statistics (breakdown voltage, mean, standard deviation, Weibull parameters) export directly to CSV or MATLAB .mat format without proprietary codec dependencies.
What maintenance is required to ensure long-term measurement stability?
Annual recalibration of HV sensor and current monitor against NIST-traceable reference standards is recommended. Oil dielectric strength should be verified quarterly; replacement is advised if measured breakdown falls below 30 kV/2.5 mm.
