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Terminology for use of breakers 3RV1 according to UL- and CSA-regulations
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QUESTION:

Terminology for use of breakers 3RV1 according to UL- and CSA-regulations

ANSWER:

Circuit breakers 3RV1 are approved for UL/CSA and can be used in accordance to UL 508 und CSA 22.2 No. 14 individually and just as well as branch circuit in combination with a contactor.
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Circuit breakers 3RV1 can be used as
1. Manual Motor Controller for Group Installations,
2. Manual Motor Controller Suitable for Tap Conductor Protection in Group Installations
3. Self-Protected Combination Motor Controller (Type E)
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1. Circuit breaker 3RV1 as "Manual Motor Controller"
Application of circuit breaker as "Manual Motor Controller" is always carried out with upstream short circuit protection.
Permitted devices are approved fuses or a circuit breaker due to UL489 / CSA 22.2 No.5.
Dimensioning of those devices shall be made according to installation regulation National Electrical Code (UL) resp. Canadian Electrical Code (CSA).
Approval of 3RV as Manual Motor Controller occured under file numbers:
UL File No. 47705,
CSA Master Contract 165071, Product Class 3211 05.
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2. Circuit breaker 3RV10 as "Manual Motor Controller Suitable for Tap Conductor Protection in Group Installations"
The applikation "Manual Motor Controller Suitable for Tap Conductor Protection in Group Installations" does exist within UL only.
CSA does not know such approval!
Application of circuit breaker as "Manual Motor Controller Suitable for Tap Conductor Protection in Group Installations" is always carried out with upstream short circuit protection.
Permitted devices are approved fuses or a circuit breaker due to UL 489.
Dimensioning of those devices shall be made according to installation regulation National Electrical Code.
Approval of 3RV as "Manual Motor Controller Suitable for Tap Conductor Protection in Group Installations" occured under file number:
UL File No. 47705
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3. Circuit breaker 3RV10 as "Self-Protected Combination Motor Controller (Type E)"
Since 16.07.2001 UL 508 demands 1 inch air distance and 2 inches creepage distance for the infeed side of a "Self-Protected Combination Motor Controller".
Therefore Circuit breakers 3RV10 in sizes S0 and S3 are UL 508 approved in combination with special terminal blocks as mentioned in relevant catalog pages.
The circuit breaker 3RV10 in size S2 fulfils the demand on air and creepage distances already in the standard version.
CSA does not demand such increased air and creepage distances.
Thus the special terminal blocks are unnecessary for application as "Self-Protected Combination Motor Controller" due to CSA.
The circuit breakers for motor protection 3RV10 are approved as "Self-Protected Combination Motor Controller" under following file numbers:
UL File No. E156943, Product Class NKJH,
CSA Master Contract 165071, Product Class 3211 08.
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 Entry ID:23763898   Date:2006-08-04 
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