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The protection measures for dust explosion-proof motor shell

作者:admin时间:2019-06-29 17:01浏览: 次

快三在线投注   With regard to the explosion-proof form "tD", there are two different schemes in this section, both of which provide a level of energy efficiency protection.

快三在线投注   Enclosure for type A and all other equipment

  The temperature requirements are as follows:

  - confirm the lowest touching temperature of dust layer according to the rule GB12476。8;

  - the highest surface temperature shall be confirmed in the dust-free state according to the rule of 23。4。4。1 in 12476。1;

  - the maximum allowable surface temperature for equipment with a dust layer thickness of no more than 5mm shall be calculated in accordance with the rule of 6.3.3.3.

  Special case type B

  - the temperature requirements are as follows:

  - confirm the lowest touching temperature of dust layer according to the rule GB12476。8;

  - the maximum surface temperature under dust cover is in accordance with iec61241-1:2004 8.2.2.2;

  - the maximum surface temperature allowed for equipment with a dust layer thickness of no more than 12.5mm shall be calculated in accordance with the rules of 6.3.3.3.2.

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