87x9 Platform Expands Gas Density Monitoring With Digital Data
Gas-insulated equipment faces increasing regulatory and technical demands, including stricter leakage documentation requirements and a growing shift toward condition-based maintenance. Trafag's 87x9 platform is a gas density monitoring system for SF₆ and alternative insulation gas mixtures that combines mechanical switching with optional continuous density measurement in a single scalable architecture.
The platform uses a density-based measuring principle with a sealed reference chamber, enabling mechanical temperature compensation so switching behavior reflects the actual dielectric condition of the gas compartment rather than short-term pressure or temperature fluctuations. The lineup includes the 8719 mechanical gas density monitor as well as hybrid variants that add an independent continuous measurement path. Mechanical switching handles defined safety-related thresholds, while continuous density measurement supplies analog or digital data for trend monitoring, leak detection, documentation, remote supervision and maintenance planning.
Each variant is calibrated for a defined gas type, mixture ratio, nominal density and operating pressure range, supporting both established SF₆ applications and alternative insulation gas concepts. Depending on the application, modular service functions for testing, gas sampling, evacuation and filling can be integrated directly into the device, allowing routine verification without disassembling or removing the monitor from the gas compartment. Flexible gas connections, adjustable electrical interfaces and a separate connector housing simplify integration into different gas-insulated equipment designs.
Applications
- SF₆ leak detection and trend monitoring
- Condition-based maintenance planning
- Gas sampling, evacuation and filling service
Industries
- High-voltage switchgear
- Power transmission and distribution
- Gas-insulated equipment manufacturing
Who It's For
- Need continuous digital density data for regulatory documentation
- Transitioning to alternative insulation gas mixtures
- Require mechanical safety switching independent of digital infrastructure
Features:
- Up to 5 switching points on mechanical monitors; up to four on hybrid variants
- Switching accuracy: ±1.45 psi (10 kPa) at 68°F (20°C)
- Switching span: up to 36.3 psi (250 kPa)
- Measurement principle—monitor: density-based system with sealed reference chamber; sensor: density-based system with quartz oscillator
- Calibrated for defined SF₆ or alternative gas mixtures
- Hybrid variants add an independent continuous density measurement path
- Analog or digital output, depending on variant
- Optional service functions: testing, gas sampling, evacuation, filling
- Flexible gas connections, adjustable electrical interfaces, separate connector housing
Trafag, Inc.
Matthews, NC
(704) 343-6339
[email protected]
trafag.com