IEEE Std 463-2019 pdf download – IEEE Standard for Electrical Safety Practices in Electrolytic Cell Line Working Zones

02-23-2022 comment

IEEE Std 463-2019 pdf download – IEEE Standard for Electrical Safety Practices in Electrolytic Cell Line Working Zones.
1.3 Word usage The word shall indicates mandatory requirements strictly to be followed in order to conform to the standard and from which no deviation is permitted (shall equals is required to). 4,5 The word should indicates that among several possibilities one is recommended as particularly suitable, without mentioning or excluding others; or that a certain course of action is preferred but not necessarily required (should equals is recommended that). The word may is used to indicate a course of action permissible within the limits of the standard (may equals is permitted to). The word can is used for statements of possibility and capability, whether material, physical, or causal (can equals is able to). 2. Defnitions For the purposes of this document, the following terms and defnitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defned in this clause. 6 area effect: A reduction of the insulation levels due to connecting a large area of the cell line foor together with conductive material or objects. battery effect: A voltage that exists on the cell line after the power supply is disconnected. NOTE—Electrolytic cells could exhibit characteristics similar to an electrical storage battery, and thus a hazardous voltage could exist after the power supply is disconnected from the cell line.
3. Description of electrolytic cell lines Electrolytic cell lines differ widely in size and in physical and electrical characteristics, even for the same type process. One cell line may operate at less than 25 V dc and another at more than 2000 V dc depending on the type and number of cells. Also, one cell line may operate at a few thousand amperes dc and another at over 600 000 A dc. Electrolytic cell lines may be located indoors or outdoors, may be in a wet or dry environment, may have conductive or nonconductive foor surfaces, and may be electrically connected to auxiliary equipment such as pumps, motors, piping, and steelwork at elevations above and/or below the cells. Electrolytic cell line installations and their associated power sources, electrical conductors, auxiliary equipment, and attachments are custom-designed for each installation. Note that the electrical shock hazard can exist for an extended time period after the cell line rectifers are de-energized. Each electrolytic cell functions similarly to an electrical storage battery, which is typically referred to as the “battery effect.” Due to this battery effect an electrical hazard will exist after the rectifer dc power supply is disconnected. The battery effect will keep the cell line energized with a potential until the chemical reaction in the cell has depleted

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