GE Multilin B90 Low Impedance Bus Differential System 2-132 PRODUCT DESCRIPTION 2.2 SPECIFICATIONS22.2.4 METERINGCURRENT METERINGAccuracy at0.1 to 2.0 CT rating: ±0.25% of reading or ±0.1% of rated(whichever is greater)2.0 CT rating: ±1.0% of readingVOLTAGEAccuracy: ±0.5% of reading from 10 to 208 VFREQUENCYAccuracy atV = 0.8 to 1.2 pu: ±0.001 Hz (when voltage signal is usedfor frequency measurement)I = 0.1 to 0.25 pu: ±0.05 HzI > 0.25 pu: ±0.001 Hz (when current signal is usedfor frequency measurement)2.2.5 INPUTSAC CURRENTCT rated primary: 1 to 50000 ACT rated secondary: 1 A or 5 A by connectionNominal frequency: 20 to 65 HzRelay burden: < 0.2 VA at rated secondaryConversion range: 0.02 to 46 CT rating RMS symmetricalCurrent withstand: 20 ms at 250 times rated1 sec. at 100 times ratedcontinuous 4xInom; URs equipped with24 CT inputs have a maximum operatingtemp. of 50°CShort circuit rating: 150000 RMS symmetrical amperes, 250V maximum (primary current to externalCT)AC VOLTAGEVT rated secondary: 50.0 to 240.0 VVT ratio: 1.00 to 24000.00Nominal frequency: 20 to 65 HzRelay burden: < 0.25 VA at 120 VConversion range: 1 to 275 VVoltage withstand: continuous at 260 V to neutral1 min./hr at 420 V to neutralCONTACT INPUTSDry contacts: 1000 maximumWet contacts: 300 V DC maximumSelectable thresholds: 17 V, 33 V, 84 V, 166 VTolerance: ±10%Contacts per common return: 4Recognition time: < 1 msDebounce time: 0.0 to 16.0 ms in steps of 0.5Continuous current draw:3 mA (when energized)CONTACT INPUTS WITH AUTO-BURNISHINGDry contacts: 1000 maximumWet contacts: 300 V DC maximumSelectable thresholds: 17 V, 33 V, 84 V, 166 VTolerance: ±10%Contacts per common return: 2Recognition time: < 1 msDebounce time: 0.0 to 16.0 ms in steps of 0.5Continuous current draw:3 mA (when energized)Auto-burnish impulse current: 50 to 70 mADuration of auto-burnish impulse: 25 to 50 msIRIG-B INPUTAmplitude modulation: 1 to 10 V pk-pkDC shift: TTL–CompatibleInput impedance: 50 kIsolation: 2 kVREMOTE INPUTS (IEC 61850 GSSE/GOOSE)Input points: 32, configured from 64 incoming bit pairsRemote devices: 16Default states on loss of comms.: On, Off, Latest/Off, Latest/OnRemote DPS inputs: 5DIRECT INPUTSInput points: 96Remote devices: 16Default states on loss of comms.: On, Off, Latest/Off, Latest/OnRing configuration: Yes, NoData rate: 64 or 128 kbpsCRC: 32-bitCRC alarm:Responding to: Rate of messages failing the CRCMonitoring message count: 10 to 10000 in steps of 1Alarm threshold: 1 to 1000 in steps of 1Unreturned message alarm:Responding to: Rate of unreturned messages in the ringconfigurationMonitoring message count: 10 to 10000 in steps of 1Alarm threshold: 1 to 1000 in steps of 1
