Internal fuse/ breaker UL SCCR test of non-existent SPD progress In poetry , generally designated External OCPD and together Take the test Must proceed do .

That is , inside Circuit breaker or interior Sheltered persons ( TD, etc. ) The SPD that does not have it is tested by UL. Alone short-circuit current Introspection Don't rate Not , outside appropriate Grade of overcurrent Circuit breaker ( OCPD) Installed SCCR test in the state Perform .

Like the Raycap Protect1 model Inside crossing gate Instead , TD present In the case interior The shelter there is Separate SCCR values To be granted number But , inside The shelter The SPD that doesn't exist is External OCPD and In parallel testing That is the UL test basic It's a principle .

This is SPD short accident city Due to overcurrent Due to Damage or malfunction without Safely Will be blocked number There is Guarantee For It's a procedure .

To sum up ,

· interior Circuit breaker or Sheltered persons ( TD, etc. ) The SPD that exists is Own SCCR value I have it .

· interior The shelter SPD without UL SCCR test city certainly External OCPD ( Overcurrent Circuit breaker ) and together I have to try do .

· External OCPD is located in front of SPD Installed short-circuit current Block it Assisting and testing In the city too certainly Includes .

this The principles are in accordance with the UL 1449 standard. General SPD SCCR test In the procedure Matching Here is the content .