Hydran 201Ti Verification; Table 13-2 - Examples Of Gas Reading Comparisons Between A Dga And - GE Hydran 201 i Instruction Manual

Chapter 13 • Maintenance
• Methane (CH )
4
• Ethane (C H )
2 6
• Carbon dioxide (CO
• Nitrogen (N )
2
• Oxygen (O )
2
The Hydran 201i System gives a composite reading of the first four gases in the above list,
in other words the gases generated by transformer incipient faults. This reading can be
compared to the DGA results using the following formula:
H201Ti reading = 100 % [H
A few examples are given in Table 13-2 on page 13-4. The difference between the actual
and the calculated readings should fall within the technical specifications of the
Hydran 201i System.
Table 13-2 - Examples of Gas Reading Comparisons Between a DGA and a Hydran 201Ti
Dissolved Gas Analysis (DGA) (ppm)
Hydrogen Carbon Monoxide
(H )
2
100 0
100 1000
100 100
100 100
100 100
13.3

HYDRAN 201TI VERIFICATION

Frequency: Annually or on fail alarm
Note: Alarms are triggered during this verification procedure. Please warn the appropriate
personnel.
Read the precautions listed in Section 5.1 on page 5-1 before
WARNING
CAUTION
handling the Hydran 201 sensor.
13-4
)
2
] + 18 % [CO] + 8 % [C
2
(CO)
0
0
0
50
50
Rev. 6, March 2011
H ] + 1.5 % [C
2 2
Acetylene Ethylene
(C H ) (C
2 2
0
0
0
0
200
H ]
2 4
H201Ti
Reading
(ppm)
H )
2 4
100
280
118
122
125
Part 17997