Beijing North Guang Precision Instruments BDCZ AC Dielectric Withstand Voltage Tester

Overview

The Beijing North Guang Precision Instruments BDCZ AC Dielectric Withstand Voltage Tester is an engineered solution for evaluating the dielectric integrity of solid, liquid, and composite insulating materials under power-frequency AC stress. Based on the fundamental principle of controlled voltage ramping and sustained high-voltage application, the system applies a sinusoidal 50/60 Hz AC voltage—up to 100 kV—to a test specimen while continuously monitoring leakage current in real time. The instrument operates in accordance with the core physical criterion defined in IEC 60243-1 and GB/T 1408.1: breakdown occurs when the specimen fails to maintain electrical resistance under applied stress, resulting in a rapid, uncontrolled increase in conduction current. This measurement directly informs compliance with safety-critical design limits for insulation systems used in household appliances, power distribution components, medical devices, industrial control panels, and high-voltage transformers.

Key Features

• Programmable AC output from 0 to 100 kV (±3% full-scale accuracy), calibrated traceably to national metrological standards;
• Simultaneous digital display of applied test voltage and real-time leakage current (0–200 mA range), enabling dynamic assessment of insulation degradation trends;
• Adjustable dwell time from 1 second to 30 minutes, supporting both short-duration flashover evaluation and extended endurance testing protocols;
• Integrated overcurrent protection (5–50 mA adjustable threshold) and series impedance protection (50–100 Ω), ensuring operator and equipment safety during unexpected breakdown events;
• 5 kVA high-voltage transformer with low waveform distortion (<5% THD), delivering stable, low-ripple sinusoidal output compliant with IEC 61000-4-8 immunity requirements;
• Dual-mode operation: automatic timed hold and manual hold with emergency stop, meeting functional safety requirements per IEC 61508 SIL 2;
• Front-panel interface with tactile rotary encoder and LED status indicators; no embedded OS or network stack—designed for lab-floor robustness and electromagnetic compatibility in industrial environments.

Sample Compatibility & Compliance

The BDCZ accommodates standardized electrode configurations per GB/T 1408.1, including 25 mm diameter disc electrodes (2 pcs), 75 mm diameter electrodes (1 pc), and optional liquid-cell assemblies for oil or silicone fluid testing. Specimen mounting fixtures support flat-sheet polymers, molded insulators, cable jackets, PCB substrates, and encapsulated electronic modules up to 300 mm × 300 mm footprint. All mechanical and electrical interfaces conform to IEC 61010-1 Edition 3 for measurement/control laboratory equipment, including double-insulated HV cabling, interlocked enclosure doors, and earth-ground continuity verification. The system meets structural requirements for Class II equipment and supports third-party validation against UL 61010-1, CSA C22.2 No. 61010-1, and FDA 21 CFR Part 11 audit trails when paired with external logging hardware.

Software & Data Management

The BDCZ operates as a standalone benchtop instrument without proprietary software dependencies. All test parameters—including voltage setpoint, dwell duration, trip current limit, and pass/fail thresholds—are configured via front-panel controls and retained in non-volatile memory across power cycles. For traceable data capture, the unit provides analog voltage and current output signals (0–10 V DC, isolated) compatible with external DAQ systems (e.g., National Instruments PXI, Keysight 34970A). Optional RS-232 serial interface enables command-driven control and ASCII-formatted result export for integration into LIMS or QA documentation workflows. Calibration records—including factory certificate, as-found/as-left data, and uncertainty budgets—are supplied with each unit and comply with ISO/IEC 17025:2017 Clause 6.6 requirements for measurement traceability.

Applications

• Verification of insulation withstand capability in AC-powered consumer electronics per UL 62368-1 Clause 5.5.2;
• Quality assurance screening of motor windings, relay coils, and contactor insulation barriers;
• Routine production-line testing of wire & cable jacketing materials (PVC, XLPE, ETFE) per ASTM D149;
• Research-grade evaluation of nanocomposite dielectrics and polymer-ceramic laminates under controlled humidity and temperature;
• Pre-compliance validation for medical device isolation barriers (IEC 60601-1, Clause 8.8.3);
• Technical supervision and type-testing at provincial metrology institutes and national quality inspection centers.

FAQ

What standards does the BDCZ tester comply with?
It is engineered to meet the electrical safety and performance requirements of IEC 61010-1, IEC 60243-1, GB/T 1408.1, UL 508A, and CSA C22.2 No. 0. Full test reports and calibration certificates are provided upon delivery.
Can the instrument perform both step-stress and ramp-rate testing?
Yes—the front-panel controls allow fixed-voltage hold (step-stress) or continuous linear voltage ramp (ramp-rate mode), with user-defined ramp speeds from 0.1 kV/s to 5 kV/s.
Is remote control or automation supported?
RS-232 serial communication is available for SCPI-style command input and result polling. No Ethernet, Wi-Fi, or cloud connectivity is included—consistent with secure industrial lab infrastructure policies.
What maintenance is required?
Annual verification of HV output accuracy and ground continuity is recommended. No consumables or firmware updates are required; the analog architecture ensures long-term operational stability.
Are calibration services available outside China?
Yes—Beijing North Guang maintains partnerships with ISO/IEC 17025-accredited calibration laboratories in Germany, Singapore, and the United States for on-site or depot-based recalibration with NIST-traceable standards.