power distribution - Siemens

Medium Voltage EquipmentGM-SG RatingsTable 2: Type GMSG Circuit Breaker Control Data TypeSwitchCircuitBreakerControl Voltages, ANSI C37.06Spring Charging MotorClose CoilTrip CoilRange Amperes ChargingNominalClose Trip Amperes Amperes Run (Avg.) Seconds24 VDC 19 - 28 14 - 28 5.8 17 / — — —48 VDC 36 - 56 28 - 56 2.9 11.4 / 30 8 10125 VDC 100 - 140 70 - 140 1.0 4.8 / 7.4 4 10250 VDC 200 - 280 140 - 280 0.5 2.1 / 4.2 2 10120 VAC 104 - 127 104 - 127 0.9 — 6 10240 VAC 208 - 254 208 - 254 0.4 — 3 10 Current at nominal voltage. Capacitor trip. Value preceding slash ( / ) is the current for the standard trip coil with standardrating interrupting time. Value following ( / ) is current for optional trip coilwith 3-cycle interrupting time. — means this selection not available in this voltage.Table 3: Interrupting Capacity Auxiliary Switch Contacts ContinuousCurrentAmperes120ACControl Circuit Voltage240AC48DC125DC250DC10 10 5 10 / 30 5 3TOC 15 15 10 0.5 0.5 0.2MOC 20 15 10 10 10 5 2 contacts in series. All switch contacts are non-convertible.Table 4: Voltage TransformersVoltageClassRatioAccuracy Classat 120V Sec.X, Y, Z Z ZZVAThermalRating5kV 2400 / 120 0.3 1.2 — 5005kV 4200 / 120 0.3 1.2 — 5005kV 4800 / 120 0.3 1.2 — 50015kV 7200 / 120 0.3 0.3 1.2 100015kV 8400 / 120 0.3 0.3 1.2 100015kV 12000 / 120 0.3 0.3 1.2 100015kV 14400 / 120 0.3 0.3 1.2 1000Table 5: Current Transformers SelectionRatio60Hz Metering Accuracy at Burden RelayB0.1 B0.5 B1.0 B2.0 ClassType MD Torroidal Standard Accuracy100:5 2.4 — — — C 15150:5 0.6 2.4 — — C 20200:5 0.6 1.2 — — C 25250:5 0.6 1.2 2.4 — C 35300:5 0.6 0.6 1.2 2.4 C 40400:5 0.3 0.6 1.2 2.4 C 60500:5 0.3 0.3 0.6 1.2 C 75600:5 0.3 0.3 0.6 1.2 C100800:5 0.3 0.3 0.6 0.6 C1301000:5 0.3 0.3 0.3 0.3 C1701200:5 0.3 0.3 0.3 0.3 C2001500:5 0.3 0.3 0.3 0.3 C2002000:5 0.3 0.3 0.3 0.3 C2102500:5 0.3 0.3 0.3 0.3 C3003000:5 0.3 0.3 0.3 0.3 C2404000:5 0.3 0.3 0.3 0.3 C230Type MDD Torroidal Special Accuracy75:5 2.4 4.8 — — C 20100:5 1.2 2.4 — — C 30150:5 0.6 1.2 2.4 4.8 C 40200:5 0.6 1.2 1.2 2.4 C 60250:5 0.3 0.6 1.2 2.4 C 80300:5 0.3 0.6 0.6 1.2 C100400:5 0.3 0.3 0.6 0.6 C130500:5 0.3 0.3 0.3 0.6 C160600:5 0.3 0.3 0.3 0.3 C210800:5 0.3 0.3 0.3 0.3 C2701000:5 0.3 0.3 0.3 0.3 C3401200:5 0.3 0.3 0.3 0.3 C4251500:5 0.3 0.3 0.3 0.3 C5102000:5 0.3 0.3 0.3 0.3 C4602500:5 0.3 0.3 0.3 0.3 C5803000:5 0.3 0.3 0.3 0.3 C6604000:5 0.3 0.3 0.3 0.3 C460 1-second through-current and momentary current are equal to the ratings ofthe associated circuit breakers. Exceeds ANSI C37.20.2 Accuracy Limit. Multi-ratio current transformers available. The accuracy ratings shown applyonly to the full secondary winding.13 SWITCHGEARSiemens Power Distribution & Control, SPEEDFAX 2007-2008 Product Catalog 13-7