ABB REL650 Product Manual

Also see for REL650 series: Technical manual Product guide Product guide Technical manual Commissioning manual

Contents

ABB REL650 Product Manual Manual pdf 16 page image

The main purpose of the OOSPPAM function is to detect,evaluate, and take the required action during pole slippingoccurrences in the power system.The OOSPPAM function detects pole slip conditions and tripsthe generator as fast as possible, after the first pole-slip if thecenter of oscillation is found to be in zone 1, which normallyincludes the generator and its step-up power transformer. Ifthe center of oscillation is found to be further out in the powersystem, in zone 2, more than one pole-slip is usually allowedbefore the generator-transformer unit is disconnected. Aparameter setting is available to take into account the circuitbreaker opening time. If there are several out-of-step relays inthe power system, then the one which finds the center ofoscillation in its zone 1 should operate first.Two current channels I3P1 and I3P2 are available inOOSPPAM function to allow the direct connection of twogroups of three-phase currents; that may be needed for verypowerful generators, with stator windings split into twogroups per phase, when each group is equipped with currenttransformers. The protection function performs a simplesummation of the currents of the two channels I3P1 andI3P2.Phase preference logic PPL2PHIZ GUID-39785DEB-E5D7-447C-977B-9E940CA8E774 v1The Phase preference logic function (PPL2PHIZ) is used withthe high speed distance protection, quad and mhocharacteristic (ZMFPDIS). It is intended to be used in isolatedor high impedance earthed networks where there is arequirement to operate on only one of the faulty lines during across-country fault. It can be used without preference torestrain operation for single earth faults with a delayed zero-sequence current release.For cross-country faults, the logic selects either the leading orlagging phase-earth loop for measurement. It initiatesoperation on the preferred fault based on the selected phasepreference. A number of different phase preferencecombinations are available for selection.PPL2PHIZ provides an additional phase selection criteria,namely under voltage criteria, suitable for cross-countryfaults. In radial networks, where there is no fault current in thephase with the external fault, current or impedance basedphase selection methods become ineffective. Hence, onlyvoltage can be used for phase selection. The phase selectionresult will be the same for all bays on a bus since the voltageis the same, which is an important condition for operatingwith phase preference.In meshed and stronger networks, it is difficult to findappropriate under-voltage or phase selection settings. IfPPL2PHIZ is unable to detect both faulty phases, then it isnot possible to provide preference. The distance protectionwill still be released however, without preference. The finalresult might be that both faulty feeders are operated. In otherwords, operation is prioritized over strict adherence topreference.Automatic switch onto fault logic, voltage and current basedZCVPSOF M13829-3 v4Automatic switch onto fault logic (ZCVPSOF) is a function thatgives an instantaneous trip at closing of breaker onto a fault.A dead line detection check is provided to activate thefunction when the line is dead.4. Current protectionInstantaneous phase overcurrent protection PHPIOC M12910-3 v13The instantaneous three phase overcurrent function has a lowtransient overreach and short tripping time to allow use as ahigh set short-circuit protection function.Directional phase overcurrent protection, four stepsOC4PTOC M12846-3 v17Directional phase overcurrent protection, four steps(OC4PTOC) has an inverse or definite time delay for eachstep.All IEC and ANSI inverse time characteristics are availabletogether with an optional user defined time characteristic.The directional function needs voltage as it is voltagepolarized with memory. The function can be set to bedirectional or non-directional independently for each of thesteps.A second harmonic blocking level can be set for the functionand can be used to block each step individually.Instantaneous residual overcurrent protection EFPIOC M12701-3 v16The Instantaneous residual overcurrent protection (EFPIOC)has a low transient overreach and short tripping times toallow the use for instantaneous earth-fault protection, with thereach limited to less than the typical eighty percent of the lineat minimum source impedance. EFPIOC is configured tomeasure the residual current from the three-phase currentinputs and can be configured to measure the current from aseparate current input.Directional residual overcurrent protection, four stepsEF4PTOC M13667-3 v19Directional residual overcurrent protection, four steps(EF4PTOC) can be used as main protection for phase-to-earth faults. It can also be used to provide a system back-up,for example, in the case of the primary protection being out ofservice due to communication or voltage transformer circuitfailure.EF4PTOC has an inverse or definite time delay independentfor each step.All IEC and ANSI time-delayed characteristics are availabletogether with an optional user-defined characteristic.1MRK 506 384-BEN ALine distance protection REL650 2.2Product version: 2.2.116 ABB