As Hydrogen (H₂) is involved in nearly every fault of the insulation system of power transformers and Carbon Monoxide (CO) is a sign of an involvement of the cellulosic / paper insulation the presence and increase of Acetylene (C₂H₂) and Ethylene (C₂H₄) further classifies the nature of a fault as overheating, partial discharge or high energy arcing. Oxygen (O₂) can be a sign of excessive ageing or leakages within the sealing of hermetic transformers. The device can serve as a compact transformer monitoring system by the integration / connection of other sensors present on a transformer via its optional analogue inputs:

• 4 Analogue inputs 0/4 … 20mADC
• 6 Analogue inputs 0/4 … 20mAAC +20% or 0 … 80 VAC +20%

HYDROCAL Comparison

	1001+	1003	1005	1008	1009	1011
Hydrogen (H2)	○	●	●	●	●	●
Moisture in Oil (H2O)	●	●	●	●	●	●
Carbon Monoxide (CO)	○	●	●	●	●	●
Carbon Dioxide (CO2)				●	●	●
Methane (CH4)	○			●	●	●
Acetylene (C2H2)	○		●	●	●	●
Ethylene (C2H4)	○		●	●	●	●
Ethane (C2H6)	○			●	●	●
Oxygen (O2)					●	●
Nitrogen (N2)						●
Propane (C3H8)						●

For more information please refer to the HYDROCAL 1009 data sheet. If you have any further questions or would like a quotation please contact our sales team.