BS EN 60666:2010

What is BS EN 60666 - Additives in mineral insulating oils about?  

BS EN 60666 is a European Standard on mineral insulating oils.  

BS EN 60666 specifies some methods to detect and determine specified additive in mineral insulating oil. The methods described in BS EN 60666 concern the detection and determination of specified additives in unused and used mineral insulating oils. The detection methods may be applied to assess whether a mineral insulating oil contains an additive as specified by the supplier. 

The determination methods are used for the quantitative determination of additives known to be present or previously detected by the appropriate detection method. 

Who is BS EN 60666 - Additives in mineral insulating oils for? 

BS EN 60666 on additives in mineral insulating oils is useful for: 

• Electrical engineer                                                                     
• Manufacturer of transformers   
• Manufacturer of insulating oil                                                   
• Manufacturer of heavy electrical equipment                               
• Manufacturer of electrical appliances                                        
• Power Distribution companies 

Why should you use BS EN 60666 -  Additives in mineral insulating oils?  

Oils are used as an insulating material due to their heat absorption and low conductivity. Additives are used to give alter oils characteristics to better suit the requirements.  

BS EN 60666 provides best practices for determination of additives in mineral oils used as insulators for electrical purposes. BS EN 60666 can be used to adhere to the requirements as stated by customer. Inspection of oil purchased can also be done based on the guidance provided in BS EN 60666. 

Use of BS EN 60666 in determination of additives in mineral oil for inspection can make it safer to work on transformers, especially in case it is being repaired. 

What’s changed since the last update? 

BS EN 60666:2010 supersedes HD 415 S1:1981. BS EN 60666:2010 includes some editorial changes with respect to HD 415 S1:1981.  

The main changes with respect to HD 415 S1:1981 are listed below: 

• A change in the title from “Detection and determination of specified anti-oxidant Additives in insulating oils” to “detection and determination of specified additives in mineral insulating oils.” The previous edition only addressed the detection and determination of antioxidant additives, about the DBPC, phenolic inhibitors and anthranilic acid 
• More advanced methods for the determination of such antioxidant additives 
• New annexes B and C which provide methods for the determination of two additives different from the antioxidants. Annex B contains a method for the determination of the concentration in used and unused insulating mineral oils of passivators of the family of derivatives of benzotriazole 
• Annex C contains a method for the qualitative identification of pour point depressants used in some commercially available paraffinic oils to improve their low temperature properties