CHAPTER 2: PRODUCT DESCRIPTION SPECIFICATIONSB30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-192Other advanced UR order code options are available to support IEC 61850 Ed2.0 (including fast GOOSE, MMS server, 61850services, ICD/CID/IID files, and so on), IEEE 1588 (IEEE C37.238 power profile) based time synchronization, CyberSentry(advanced cyber security), the Parallel Redundancy Protocol (PRP), IEC 60870-5-103, and so on.2.5 SpecificationsSpecifications are subject to change without notice.2.5.1 Protection elementsThe operating times include the activation time of a trip rated form-A output contact unless otherwise indicated. FlexLogicoperands of a given element are 4 ms faster. Take this into account when using FlexLogic to interconnect with otherprotection or control elements of the relay, building FlexLogic equations, or interfacing with other intelligent electronicdevices (IEDs) or power system devices via communications or different output contacts. If not specified, the operate timesgiven here are for a 60 Hz system at nominal system frequency. Operate times for a 50 Hz system are 1.2 times longer.BUS DIFFERENTIAL (87B)Pickup level: 0.050 to 6.000 pu in steps of 0.001Low slope: 15 to 100% in steps of 1High slope: 50 to 100% in steps of 1Low breakpoint: 1.00 to 30.00 pu in steps of 0.01High breakpoint: 1.00 to 30.00 pu in steps of 0.01High set level: 0.10 to 99.99 pu in steps of 0.01Dropout level: 97 to 98% of pickupLevel accuracy:0.1 to 2.0 × CT rating: ±0.5% of reading or ±1% of rated (whichever is greater) for six circuits or less in the zone>2.0 × CT rating ±1.5% of reading of the maximum circuit currentOperating time: one power system cycle (typical)Number of zones: 2CT TROUBLEResponding to: Differential currentPickup level: 0.020 to 2.000 pu in steps of 0.001Pickup delay: 1.0 to 60.0 sec. in steps of 0.1PHASE/NEUTRAL/GROUND TOCCurrent: Phasor or RMSPickup level: 0.020 to 30.000 pu in steps of 0.001Dropout level: 97% to 98% of pickupLevel accuracy:0.1 to 2.0 × CT: ±0.5% of reading or ±0.4% of rated (whichever is greater)> 2.0 × CT: ±1.5% of reading > 2.0 × CT ratingCurve shapes: IEEE Moderately/Very/Extremely Inverse; IEC (and BS) A/B/C and Short Inverse; GE IAC Inverse,Short/Very/ Extremely Inverse; I 2 t; FlexCurves™ (programmable); Definite Time (0.01 s basecurve)Curve multiplier: Time Dial = 0.00 to 600.00 in steps of 0.01Reset type: Instantaneous/Timed (per IEEE)Curve timing accuracy at 1.03 to 20 x pickup:±3.5% of operate time or ±½ cycle (whichever is greater) from pickup to operateVoltage restraint: Modifies pickup current for voltage in the range of 0.1 < V < 0.9 VT Nominal in a fixed linear rela-tionship
