IEC 60836-2015 pdf Specifications for unused silicone insulating liquids for electrotechnical purposes

4 Properties 4.1 General properties As defined in 3.2， silicone liquid for transformers has high flash and fire points and is therefore difficult to ignite. If combustion occurs, heat release rate is much lower than that of hydrocarbon oils. In addition to use at similar working temperatures to those of transformers containing mineral transformer oil， silicone insulating liquids may also be used in appropriately designed electrotechnical equipment operating at higher temperatures. The solubility of water in silicone liquids is greater than in mineral oils. Other physical characteristics which are important for the design of electrotechnical equipment, e.g. heat transfer, may also be different from those of mineral transformer oil and will need to be taken fully into account by the designer.
4.2 Properties relating to health, safety and environment (HSE) 4.2.1 Handling Silicone liquids ultimately degrade in nature to simple, naturally occurring substances. Their handling is not hazardous to health. Direct contact with the eyes may cause slight irritation. Safety glasses should be worn to avoid splashing the eyes. In the case of eye contact, irrigation with large quantities of clean running water should relieve any irritation. If irritation persists, seek medical advice. Detailed information on safe handling of these liquids can be obtained from manufacturers or suppliers. 4.2.2 Disposal Local regulations shall be complied with. The preferred means of disposal is recycling by a qualified contractor. W aste liquid may be incinerated. Spillages should be cleaned using adsorbent media. Small quantities of liquid entering the environment present no special hazard.
5 General delivery requirements and identification Transport of silicone insulating liquid shall be in clean hermetically sealed containers whose lining does not interact with the contents. Each container shall display the following information: 一number of this standard; supplier’s designation; batch number; any notices required by local regulatory authorities. Electrotechnical equipment flled with silicone insulating liquid should be labelled for identification with respect to the insulation used. 6 Storage and maintenance Storage should preferably be indoors and shall be in sealed containers to prevent ingress of moisture and dirt. If accidentally contaminated by water and/or solid particles during storage, the liquid can usually be restored to acceptable quality by the procedures described in IEC 60944. 7 Sampling The liquid shall be sampled in accordance with IEC 60475, using the procedure consistent with the density of the liquid being sampled. IsopropyI alcohol is suitable for cleaning the sampling equipment.