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ZXMD-2003 Fully Automatic SF₆ Density Relay Calibrator: Technical Overview for Power Equipment Applications
Introduction
The ZXMD-2003 Fully Automatic SF₆ Density Relay Calibrator is an advanced, intelligent calibration device designed for the precise verification of SF₆ gas density relays and pressure gauges in high-voltage electrical equipment. As SF₆ gas is widely used in circuit breakers, GIS (Gas-Insulated Switchgear), and transformers due to its excellent insulation and arc-quenching properties, maintaining accurate density monitoring is critical for operational reliability. The ZXMD-2003 addresses this need by enabling automated, temperature-compensated calibration of both mechanical (pointer-type) and electronic SF₆ density relays, ensuring compliance with industry standards under varying environmental conditions.
Key Features and Innovations
1.Advanced Microcontroller Architecture
a.Utilizes a hybrid analog-digital single-cycle high-speed microcontroller, offering 20x faster processing than conventional microcontrollers.
b.Integrated A/D and D/A converters, reference voltage circuits, and analog amplification ensure high stability and accuracy (≤0.2% FS).
2.Temperature-Compensated Pressure Measurement
a.Converts real-time pressure readings to standardized values at 20°C, eliminating errors caused by ambient temperature fluctuations.
b.Simultaneously displays live pressure, temperature-compensated pressure, and ambient temperature (-40°C to 120°C, ±1.0°C accuracy).
3.Multi-Contact Verification Capability
a.Supports 1–3 sets of relay contacts (NO/NC configurations) with real-time interrupt-driven capture for precise measurement of actuation and recovery values.
4.Automated Workflow
a.Fully automated calibration process reduces human intervention, minimizing errors and SF₆ gas emissions (<1% total gas loss during testing).
5.User-Centric Design
a.8.4-inch industrial-grade capacitive touchscreen with intuitive Chinese/English GUI.
b.Onboard data storage (1,000 datasets), RS-232/USB connectivity, and a built-in thermal printer for immediate reporting.
6.Field-Ready Configuration
a.Integrated gas pressurization system (no external gas source required).
b.Leak-resistant quick-connect fittings and universal adapters enable in-situ testing without disassembling equipment.
Technical Specifications
| Parameter | Value/Range | Accuracy/Resolution |
| Pressure Measurement | 0–1.0000 MPa | 0.0001 MPa resolution |
| Temperature Measurement | -40°C to 120°C | ±1.0°C |
| Calibration Accuracy | ≤0.2% FS | -- |
| Power Supply | AC 220V±10% / DC 8.4V (Li-ion) | 10W max consumption |
| Data Storage | 1,000 datasets | Non-volatile memory |
| Dimensions/Weight | 460×380×180 mm / 10.0 kg | Portable design |
Applications in Power Systems
1.Preventive Maintenance
Validates SF₆ density relays in circuit breakers and GIS to prevent false alarms or failures caused by gas leakage.
2.Commissioning & Troubleshooting
Ensures relay accuracy during installation or post-fault analysis.
3.Laboratory Calibration
Serves as a reference standard for pressure/density gauges.
Operational Advantages
1.Efficiency: Reduces calibration time by 70% compared to manual methods.
2.Environmental Compliance: Near-zero SF₆ emissions align with EPA and IEC 60480 guidelines.
3.Versatility: Compatible with all relay types (mechanical, electronic, hybrid).
4.Traceability: Stored data supports ISO 17025-compliant audit trails.
Calibration Workflow
1.Connection: Attach the device to the relay via quick-connect fittings.
2.Auto-Pressurization: The internal pump adjusts pressure while monitoring real-time data.
3.Contact Capture: The microcontroller records exact pressure/temperature values at relay actuation.
4.Reporting: Generate certificates or export data for analysis.
The ZXMD-2003 sets a new benchmark in SF₆ density relay calibration by combining high precision, automation, and user-friendly operation. Its ability to perform temperature-compensated measurements in harsh environments makes it indispensable for ensuring the reliability of SF₆-insulated power equipment. By minimizing human error and gas waste, this device not only enhances grid safety but also supports sustainable maintenance practices.
GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/
