| Transformer Oil Sampling |
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| Transformer oil sampling should be done in order to obtain the most representative oil samples . |
| To ensure that the most representative samples will be obatined , transformer oil sampling should be |
| considered in 4 factor area as following:- |
| |
1. |
Sampling Method (Sampling Procedure) |
| |
2. |
Sampling Appratus (Sampling Tools and Devices) |
| |
3. |
Sampling Location |
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4. |
Sampling Frequency |
| 1. |
Sampling Method or Procedure |
| Transformer oil sampling should be done in accordance with proper and standard method . |
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ASTM D3613 : Standard Practice for Sampling Electrical Insulating Oils for Gas Analysis and
| determination of water content |
|
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| ASTM D 923 : Standard Practice for Sampling Electrical Insulating Liquids. |
| 2. |
Sampling Appratus (Sampling Tools & Devices) |
| As per ASTM D 3613 ,For dissolved gas analysis , use glass-syringe |
| In general , mineral oil filled transformers (mineral insulated oil with relative density less than one), should |
| be samples from the bottom valve . |
| Regular- periodic -routine sampling - testing of transformer oil is a valuable technique and strategy in preventive |
| maintenance program and needs to be performed correctly and regularly . |
| Normal -Regular-periodic -Routine Sampling Frequency will be 6 month basis to a year basis |
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