This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
- For all types of thermal overload relays (LRD or LR9D or LR9F), These can be classified as follows:
* Class 10: According to IEC60947-4-1, it specifies the tripping time for 7.2 In to be between 2 to 10 Seconds
* Class 20: According to IEC60947-4-1, it specifies the tripping time for 7.2 In to be between 6 to 20 Seconds
This difference in tripping time has value in time coordination,
* Class 10: According to IEC60947-4-1, it specifies the tripping time for 7.2 In to be between 2 to 10 Seconds
* Class 20: According to IEC60947-4-1, it specifies the tripping time for 7.2 In to be between 6 to 20 Seconds
This difference in tripping time has value in time coordination,
Released for: Schneider Electric Egypt and North East Africa
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