power distribution - Siemens

Medium Voltage EquipmentGM-SG RatingsSelectionTable 1: Type GMSG Circuit Breaker Ratings (New “Constant kA” Ratings Basis)These ratings are in accordance with the following standards:▪ ANSI/IEEE C37.04-1999 Standard Rating Structure for AC High-Voltage Circuit Breakers▪ ANSI C37.06-2000 AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis - Preferred Ratings and RelatedRequired Capabilities▪ ANSI/IEEE C37.09-1999 Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis▪ ANSI/IEEE C37.010-1999 Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current BasisCircuit Breaker Type 13SWITCHGEARRated ValuesUnits5-GMSG-40xxxx-1045-GMSG-50xxxx-1305-GMSG-63 xxxx-1647-GMSG-40xxxx-10415-GMSG-25xxxx-6515-GMSG-40xxxx-10415-GMSG-50xxxx-130Maximum Design Voltage (V) kV rms 4.76 4.76 4.76 8.25 15.0 15.0 15.0 15.0Voltage Range Factor (K) — 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0WithstandVoltage LevelsPowerFrequencyLightningImpulse (BIL)15-GMSG-63 xxxx-164kV rms 19 19 19 36 36 36 36 36kV crest 60 60 60 95 95 95 95 95Continuous A rms1200200030004000FC1200200030004000FC1200200030004000FC1200200030004000FC120020001200200030004000FC1200200030004000FC1200200030004000FCShort-Circuit (I) kA rms sym 40 50 63 40 25 40 50 63Interrupting Time mscycles835835835835835835835835Permissible Tripping Delay (Y) Sec 2 2 2 2 2 2 2 2Max. Sym. Interrupting (I) kA rms sym 40 50 63 40 25 40 50 63% dc Component % 47 47 47 47 47 47 47 47Short-Time Current (I)(3 seconds)kA rms 40 50 63 40 25 40 50 63Closing & Latching(Momentary) Asymmetrical(1.55 x I)kA rms 62 78 98 62 39 62 78 98Closing & Latching(Momentary)Peak(2.6 x I)kA peak 104 130 164 104 65 104 130 164 “xxxx” in type designation refers to the continuous current rating 1200, 2000, or3000A, as appropriate. The 4000A fan-cooled rating is achieved using a 3000Acircuit breaker, in combination with fan cooling as indicated in footnote 4. Maximum design voltage for which the circuit breaker is designed, and the upperlimit for operation. K is listed for informational purposes only. For circuit breakers rated on a “constantkA basis”, the voltage range factor is 1.0. 4000FC indicates that fan cooling is included in the switchgear structure for thisrating. 4000A rating is not available in outdoor equipment. All values apply to polyphase and line-to-line faults. Standard duty cycle is O - 0.3s - CO - 3 min. - CO. Standard rated interrupting time is 5 cycles (83ms). Optional rated interrupting timeof 3 cycles (50ms) is available. Consult factory for availability.13-6Siemens Power Distribution & Control, SPEEDFAX 2007-2008 Product Catalog