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Benefits of SF₆ Gas Density Sensors in High-Voltage Electrical Equipment
Aug 11, 20251. Prevents Gas Leakage & Ensures Insulation Integrity
If the pressure drops due to leakage, it will lead to a decrease in insulation strength, increasing the risk of arcing and short circuits. In addition, the possibility of equipment failure will also increase, leading to unplanned downtime. This will cause breakdown between live parts inside the device, leading to a short circuit. If it's serious, it could even cause an explosion.
How SF₆ Gas Density Monitor help:
l Real-time monitoring: Detects even minor leaks in SF₆ gas, which is essential for maintaining dielectric strength (SF₆ is 3x more insulating than air).
l Alerts for critical thresholds: Triggers alarms if gas density drops below safe levels, preventing insulation failure or arcing.
2. Enhances Operational Safety
l Avoids internal faults: Low SF₆ density increases the risk of partial discharge or flashovers. Sensors mitigate this by enabling timely refills.
l Temperature compensation: Unlike simple pressure gauges, density sensors account for temperature fluctuations, ensuring accurate readings in extreme environments (e.g., -40°C to +60°C).
3. Extends Equipment Lifespan
l Reduces mechanical stress: Proper gas density maintains optimal operating conditions, minimizing wear on contacts and actuators.
l Prevents corrosion: Moisture ingress (due to leaks) can corrode internal components. Sensors help maintain a sealed, dry environment.
4. Compliance with Industry Standards
l Meets IEC 62271, IEEE C37.100, and EU F-gas regulations (e.g., mandatory leak checks under Regulation No. 517/2014).
l Supports predictive maintenance, reducing unplanned outages and fines for non-compliance.
5. Cost & Maintenance Efficiency
l Early leak detection cuts SF₆ refill costs (SF₆ is a potent greenhouse gas and expensive to replace).
l Hermetically sealed sensors (e.g., welded AISI 304 stainless steel) require minimal upkeep and resist harsh substation conditions.
Why Choose Modern SF₆ Sensors?
✔ Accuracy: ±1% density measurement under varying temperatures.
✔ Durability: IP66-rated, vibration-resistant (20 m/s²), and shockproof (up to 50g).
✔ Smart features: 4-20mA outputs, remote monitoring, and integration with SCADA systems.
From preventing failures to ensuring regulatory compliance, SF6 gas density sensors are indispensable in high-voltage applications like:
✔ Gas-insulated switchgear (GIS)
✔ High-voltage circuit breakers
✔ Power transformers & GILs
✔ Substations & switchyards
Need help selecting a sensor for your voltage class? Let’s discuss!
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