Advanced SF6 Density Relay Calibration: The ZXMD-2000 Solution

The reliable operation of gas-insulated switchgear (GIS) and circuit breakers heavily depends on the accurate monitoring of SF6 gas density. The SF6 density relay is a critical device that ensures this by triggering alarms or lockout signals when density falls below set thresholds. Regular calibration of these relays is essential for maintaining system protection and preventing failures. The ZXMD-2000 Full Automatic SF6 Density Relay Calibrator represents a significant technological leap in this field, offering technicians a powerful, intelligent, and highly portable tool for precise and efficient on-site verification.

At its core, the ZXMD-2000 is built around a 32-bit high-performance microprocessor and a high-speed signal processing chip, ensuring fast computational capabilities and exceptional stability. Its high-precision pressure sensor and high-speed A/D converter deliver an impressive instrument accuracy of 0.2 class with a pressure resolution of 0.001 MPa. This forms the foundation for its most notable feature: fully automatic testing and dynamic temperature compensation.

Traditional calibration methods often grapple with the influence of ambient temperature on gas pressure. The ZXMD-2000 elegantly solves this by automatically measuring the pressure at the exact moment a relay contact acts, simultaneously recording the ambient temperature. It then performs real-time conversion of this value to its equivalent pressure at the standard 20°C reference temperature. This intelligent compensation, displayed clearly on the large Chinese LCD screen alongside the ambient pressure and temperature, allows for accurate calibration in any field environment from -20°C to 80°C, eliminating the need for a constant temperature chamber.

Operational efficiency is paramount for field technicians. The calibrator streamlines the entire process. After connection via its robust all-metal quick connectors—designed to avoid seizing in cold climates—the test is fully automatic. The instrument controls the pressure ramp, detects relay signals, records all data, and requires no manual pressure adjustment. The intuitive human-machine interface, featuring a rotary mouse ("one-button fly shuttle"), makes navigation and parameter setting straightforward.

Furthermore, the ZXMD-2000 is designed with practicality in mind. It consumes minimal SF6 gas during testing, reducing cost and environmental impact. It can store up to 50 complete test reports with power-off protection and features an on-board high-speed micro printer for immediate Chinese-character reporting. Its online system clock and pressure correction functions enable easy field updates and calibration of the instrument itself. With a comprehensive set of adapters, it can test single alarm, single lockout, or combinations (alarm with one or two lockouts) on most common relay models without disassembly, maximizing utility.

In summary, the ZXMD-2000 Full Automatic SF6 Density Relay Calibrator combines high-precision measurement, intelligent automation, and rugged portability. It empowers technicians to perform reliable, environmentally friendly, and efficient calibrations directly on-site, ensuring the continued integrity and safety of critical electrical assets. Its blend of sophisticated technology and user-centric design makes it an indispensable tool for modern substation maintenance.

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/