MR MSENSE DGA 9 - 3. General information

MSENSE
®
DGA 9 7045899/02 EN – 11.2020 Page 13
3. General information
The MSESNE DGA 9 device is a permanently installed multiple “gas-in-oil” analysis system. It enables
the individual measurement of oil moisture (H
2
O) and the key gases dissolved in the oil: hydrogen (H
2
),
carbon monoxide (CO), carbon dioxide (CO
2
), methane (CH
4
), acetylene (C
2
H
2
), ethylene (C
2
H
4
),
ethane (C
2
H
6
) and oxygen (O
2
).
While hydrogen (H
2
) occurs in almost every fault in the insulation system of power transformers and
carbon monoxide (CO) is a sign of problems with cellulose / paper insulation, the presence of or in-
crease in acetylene (C
2
H
2
) and ethylene (C
2
H
4
) serves to classify faults such as overheating, partial
discharge or high energy arcing.
Oxygen (O
2
) is an indicator of damage to the sealing of hermetically sealed transformers.
The key advantages
• Individual measurements of hydrogen (H
2
), carbon monoxide (CO), carbon dioxide (CO
2
), me-
thane (CH
4
), acetylene (C
2
H
2
), ethylene (C
2
H
4
), ethane (C
2
H
6
) and oxygen (O
2
).
• Measurement of oil moisture (H
2
O)
• Communication interfaces ETHERNET 10/100 Mbit / s (copper / RJ45 or fibre optic / SC du-
plex) and RS485 to support the transmission protocols MODBUS® RTU / ASCII, MODBUS®
TCP as well as the proprietary protocol.
• Optional on-board DNP3 serial modem for connection to a process control system (SCADA)
using communication protocol DNP3.
• Optional on-board IEC 61850 modem for communication with substations by means of com-
munication protocol IEC 61850.
This device may only be used in accordance with the instructions in this man-
ual.
If this device is used in a way not specified by the manufacturer, the guaran-
tee can expire and impair the protection to be determined by the measuring
device.
The device manufacturer does not accept any liability for property damage or
personal injury resulting from improper use or non-observance of the safety in-
structions.