Geomagnetic
induced currents (GIC) caused
by solar disturbances can greatly affect power utility systems.
Resulting DC currents can cause power transformer core saturation,
leading to overheating, high operating noise, reduced capacity,
insulation degradation, and possible failure. Relay operation
due to these disturbances can lead to localized or system-wide
outages.
Dairyland manufactures GIC blocking
devices that can prevent these problems. Such devices
can:
- Block the flow of DC current, while
conducting AC current
- Have AC fault current ratings sized
to the available fault current
- Provide solid neutral grounding
for the AC system
- Switch automatically between conduction
and blocking modes
- Provide greater system reliability
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