H2scan TM Catalog 2025 - Flipbook - Page 40
Importance of Hydrogen Monitoring and Hydrogen Sensors
Hydrogen gas is a critical indicator of transformer health for several reasons:
1. It is present in all fault types, regardless of the root cause (thermal, electrical or a combination).
2. Hydrogen appears at lower temperatures than other fault gases, making it an early warning sign
of insulation degradation.
3. Unlike other fault gases, which can peak and diminish at higher temperatures, hydrogen generation
continuously increases with the intensity of the fault.
By monitoring hydrogen ppm values and rate of change, maintenance staff responsible for the transformer
operations can con昀椀dently detect faults at an early stage. This detection enables staff to take proactive
measures to prevent catastrophic failures, extending the reliable life of these assets.
Real-time Asset Health Awareness for Transformers
The primary advantage of H2scan’s approach lies in its focus on
hydrogen monitoring, which detects faults at lower temperatures
than other fault gases because hydrogen is consistently present
regardless of fault type. This early detection capability offers
transformer owners a proactive means to manage asset health,
combining real-time monitoring with periodic DGA sampling for
a comprehensive diagnosis, ultimately enhancing operational
e昀케ciency and reducing maintenance costs.
H2scan’s solid-state sensors provide continuous real-time
monitoring of hydrogen levels dissolved in the transformer oil
or present in the gas space. A sudden appearance or increase
in hydrogen concentration can indicate an active insulation
degradation process occurring. Even a temporary “blip” or spike
in hydrogen levels could signal an overload, overheating or other
event that caused the insulating 昀氀uid temperatures to rise high
enough (around 150°C) to generate hydrogen through the breakdown of the insulating materials.
Unlike other hydrogen monitors, H2scan supplies a hydrogen solution with a multi-patented solid-state sensor
technology that provides several advantages over traditional multi-gas monitors:
1. No maintenance required: The sensor does not require periodic calibration or replacement,
reducing maintenance costs and downtime.
2. Auto-calibration: The sensor automatically calibrates itself, ensuring accurate and
reliable measurements.
3. Compact design: The sensor’s compact form factor (approximately 6 inches long) allows
easy installation and integration into existing systems.
4. Cost-effective: H2scan’s solution falls well within and often below the industry standard of
8-10% of the transformer’s cost, making it an economical choice for transformer owners.
H2scan’s sensors can be integrated into various communication protocols, enabling seamless data access
and analysis.
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pg.40
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