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Appendix A : Technical Specifications for the Hydran 201i System
A.1
Hydran 201Ti Intelligent Transmitter
GENERAL
Description Continuous, on-line, intelligent gas-in-oil transmitter
Components Sensor and electronic modules housed in cylindrical enclosure
Gas Response Hydrogen (H
Medium Mineral, insulating oil for transformers
Application Transformer monitoring; specifically, detection of incipient faults
ANALYTICAL PERFORMANCE
Principle Gas-permeable membrane and combustible gas detector
Sampling Method Flooded port with 1 in NPT male threads
Measurement Gas: 0-2,000 ppm (volume/volume, H2 equivalent) other ranges
Accuracy For 0–2,000 ppm range: ± 10% of reading ±25 ppm (H
Relative
Sensitivity
Response Time 10 minutes sensor response (90 % of step change)
External
Sampling Port
Page 202
), carbon monoxide (CO), acetylene (C
2
(C
H
)
2
4
in oil-filled electrical equipment
available
equivalent)
H
: 100 % of concentration
2
CO: Typical 15 ± 4 % of concentration
C
H
: Typical 8 ± 2 % of concentration
2
2
C
H
: Typical 1.5 ± 0.5 % of concentration
2
4
Designed for glass syringe with Luer stop cock; closed with
5/32-in (approximately 4 mm) Allen screw
Hydran* 201i Instruction Manual
2
H
), ethylene
2
2
MA-033
Rev. 14.0, 12-Nov-18
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