Generator Gas Analyzer (GGA)
Purity, efficiency, and safety
E/One Generator Gas Analyzer Systems
E/One's Generator Gas Analyzer (GGA) for hydrogen-cooled generators is a triple-range sensor/analyzer that provides continuous monitoring of gas purity during all phases of generator operation.
We've taken a proven monitoring principle — thermal conductivity — and improved upon it. The result of E/One's development work is an extremely accurate, robust and stable system that eliminates the issues of drift and need for frequent recalibration seen in other thermal conductivity systems.
E/One supplies GGA systems in a range of configurations, from stand-alone sensor/analyzers and retrofit "drop-in" replacement systems, to comprehensive hydrogen control cabinets that monitor gas purity, provide continuous monitoring of case and differential pressures and interact with plant control systems to assure the highest level of generator efficiency.
E/One also offers a portable hydrogen gas analyzer (PGA). The PGA incorporates the same sensor/analyzer and system electronics found in E/One's other gas purity systems. The PGA is specifically intended for use in non-hazardous environments and/or as an emergency backup if a power plant's primary gas purity monitoring system is compromised.
E/One's hydrogen gas monitor is also available as part of the E/One Gas Station, which lets power plants combine several E/One generator monitoring and control systems onto one skid.
Available in North America, E/One now offers best-in-class thermal conductivity and vibrating element technology with E/One’s GGA and Yokogawa Corporation of America’s (YCA) GD402. The E/One-YCA alliance brings together industry leaders focused on plant-level relationships and a wide range of generator applications. With E/One’s GGA and YCA’s GD402, operators are provided with options in continuous monitoring of gas purity throughout all phases of generator operation.
Generator Gas Analyzer Features and Benefits
- Increased generator efficiency and safety
- Microprocessor controlled
- Flameproof, explosion-proof, and intrinsically safe designs
- Custom configurations to meet site-specific requirements
- Suitable for new and retrofit applications
Generator Gas Analyzer Specifications
|Technology Principle||Thermal Conductivity||Vibrating Element (VBE)|
|Case Purity||70% to 100% H2 in Air||80% to 100% H2 in Air|
|Purge||0 to 100% H2 in CO2||0 to 100% H2 in CO2|
|0 to 100% Air in CO2||0 to 100% Air in CO2|
|Flow Rate||Nominal 500 cc/min||100 to 700 cc/min|
|Accuracy||+/- 0.5% F.S. on H2 in Air|
|+/- 1.0% F.S. on H2 or Air in CO2|
|Linearity||+/- 1.0% F.S.|
|Drift||<0.2% / month|
|Power - Input Voltage||115/230 VAC||100/240 VAC|
|Input Frequency||50/60 Hz||50/60 Hz|
|Output Signal||4-20 mA current output,||(2) 4-20 mA current output,|
|Output, Relays||30V/1.0 A DC, 120V/0.5 A AC||30V/3.0A DC, 250V/0.3 A AC|
|Alarm, NO and NC||125V/0.005 A resistive DC||125V/0.005 A resistive DC|
|Warning, NO and NC||Maintenance, NO and NC|
|Trouble, NO and NC||Fail, NC|
|Normal, NO and NC|
|Overall Dimensions||Based on configuration||Based on configuration|
|System Electronics Enclosure||11" x 12" x 9.25"|
|Sensor Cell Enclosure||8" x 10" x 6.25"|
|Display Enclosure||0.5" x 8.5" x 6.25" or panel|
|Valve Panel (optional)||mounted per requirement|
|Weight||Based on configuration||Based on configuration|
|Temperature||32-149 F (0-65 C), optional||10-140 F (-10 to 60 C)|
|Area Classification||Class 1, Zone 2, Group IIB + H2||Class 1, Division 1, Group B, C, D|
|Gas Pressure||100 psi maximum||70 psi maximum|
|Gas Connections||1/4" female NPT||1/4" female NPT|
Download a PDF file of the GGA brochure