Siemens 3AH Series Instructions Manual

Also see for 3AH: Instructions, Installation, Operation, Maintenance Installation operation & maintenance

AppendixTable A-1 bType 3AH Circuit Breaker Ratings (New "Constant kAR Rating Basis)ANSI C37.04-1999 Standard Rating Structure for AC High-Voltage Circuit BreakersANSI C37.06-2000 AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis- Preferred Ratings and Related Required CapabilitiesANSI C37.09-1999 Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current BasisANSI C37.010-1999 Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current BasisCircuit BreakerTypeRated Values Units 5-3AH- 5-3AH- 5-3AH- 7-3AH-1 5- 1 5-3AH- 1 5-3AH- 1 5- 1 5-3AH-3AH- 3AH-31 4050 40 2025 31 40 50Maximum Design Voltage ( V ) '" kV rms 4.764.76 4.76 8.25 1 5.0 1 5.0 1 5.0 1 5.0 1 5.0Voltage Range Factor ( K ) " - - 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0Withstand Power Frequency kV rms 19 19 19 36 36 36 36 36 36Voltage Levels LightninglrTI_!l_ulse (BIL) kV crest 60 60 60 95 95 95 95 95 951200 1200 1200 1200 1200 1 200 1200 1 200 1 200Continuous " A rms 2000 2000 2000 2000 20002000 3000FC 3000FC 3000FC 2000 2000 2000 3000FC 3000FCShort-Circuit ( I ) " �kA rms-l;'{m 31.5 40 50 40 20 25 31.5 40 50I nterrupting Time ms 83 83 83 83 83 83 83 83 83Cycles 5 5 5 5 5 5 5 5 5Permissible Tripping Delay (Y ) Sec 2 2 2 2 2 2 2 2 2Max. Sym Interrupting ( I ) kA rms- 31.5 40 50 40 20 25 31.5 40 50svm% de Component % 47 47 47 47 47 47 47 47 47Short-Time Current ( I ) (3 seconds) kA rms 31.5 40 50 40 20 25 31.5 40 50Closing & Latching (Momentary)Asymmetrical ( 1.55 x I ) kA rms 49 62 78 62 31 39 49 62 78Closing & Latching (Momentary) kA peakPeak ( 2.6 x I ) 82 104 130 104 52 65 82 104 130Footnotes1. Maxi m u m volta ge for which the circuit breaker is designed, and the upper l i m it for operation.2. K is l isted for i nformational pu rposes on ly. For circuit breakers rated o n a " kA basis;'the Voltage Range Factor is 1.0.3. 3000FC indicates that fan cooling may be required i n the switchgear structure to achieve this rating.4 . A I I values apply to polyphase and l ine-to-line faults.5. Standard duty cycle is 0 - 0.3sec - CO - 1 5sec - CO.38-3AH-31.538.01.080150120020003000FC31.5835231.54731.5498236www . ElectricalPartManuals . com

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