The insulating liquids and related systems are classified respectively as “PCB” and “systems containing PCBs”, when the total concentration of the PCBs (209 possible congeners), PCTs (polychlorinated triphenyls – 8557 possible congeners) and PCBTs (polychlorinated Benzyltoluene) exceeds the limits stated by national laws.
These compounds are classified as hazardous, carcinogenic for humans and bio-accumulative in the food chain.
- the European Council Directives (96/59/EC – Best Available Techniques, 96/61/EC – Best Environmental Practices 2001/68/EC), with
- the Stockholm Convention on POPs
- and other standards (IEC 60422 Ed.4-2013, CENELEC CLC/TR 50503 in February 2010, CIGRE 413 in April 2010).
The SM-TCPs kit allows you to determine PCB contamination of mineral insulating oils on site
The SM-TCPs kit (Patented mothod) can be used for the following reasons:
- environmental, in cases where there is no sign of PCB oil contamination in transformers and other electrical equipment (or in tanks)
- regulations, to verify compliance with the legislative limits
- functional, to evaluate, prevent or mitigate the risk of contamination during operations such as changing the oil, topping, depolarization, or maintenance work performed throughout the equipment’s life cycle.
The SM-TCPs kit can also be used on site since it does not require standard laboratory services.The test can also be done by normal staff members, thanks to the illustrated manual, tutorials and videos as well as Sea Marconi’s training and assistance service.
Due to global demand Sea Marconi has developed two versions of this kit: the POTENTIOMETER, and the COLORIMETRIC. Below are the main differences:
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|Method||Colorimetric titration||Electrochemical method|
|Measurement limits||10 – 500 mg/kg equivalent to PCB (Aroclor 1260)||0,5 – 2000 mg/kg equivalent to PCB (Aroclor 1260)|
|Accuracy||10 mg/Kg||1 mg/Kg|
|Content||The basic package contains 20 kits (kits are not sold separately).Each pack contains:
to perform the analysis a micro dispenser with points is required (one-time)
|The basic package contains 40 kits (kits are not sold separately).Each pack contains:
|The test result calculation method||a paper conversion table (included)||Electronic Spreadsheet (included)|
|Duration of the test||approx. 10 min||approx. 10 min|
|From the end of 2018 a simplified kit TCPsCOLOR50)
is also available that allow to determine if the
contamination of the oil is above or below 50 ppm of PCB eq
If the results find that equivalent PCB level to be below the legal limit, the oil and the transformer can be classified as “NON PCB” (code green). If the level is above the legal limit, the oil and the relative transformer can be classified as “suspect PCB” (code yellow).
In Europe a concentration of PCB greater than 50 mg/kg is considered “suspect PCB“; if it is greater than 500 mg kg-1 then it is regarded as “Highly suspect PCB” (code red). In these cases the concentration value must be confirmed by an accredited laboratory using official methods (CONTACT FOR MORE INFORMATION).
Disclosure to the relevant authorities about the contamination of electrical equipment must be carried out, in any case, by an accredited laboratory using chemical analysis in accordance with the relevant regulation IEC-EN 61619 (PCB) EN-12766 (PCT and PCBT) .The laboratory certificates must report the methods used, the uncertainty and the laboratory competence requirements (EN ISO/IEC 17025, EN ISO 9001).