GE Digital Energy
GEDigital EnergyMultilin 869 Comprehensive Motor Protectionand Management for Mediumand Large MotorsThe Multilin 869 relay is a member of the Multilin 8 Series protective relay platform and hasbeen designed for the protection, control and management of medium and large inductionand synchronous motors.The Multilin 869 provides advanced functionality for various types of applications such ashigh-speed protection, extensively customizable programmable logic, advanced motormonitoring and diagnostics, and flexible configuration capabilities.10YEARWORLDWIDEWARRANTYInnovative Technology & Design Advanced motor protection, control anddiagnostics capability Patented environmental monitoring anddiagnosticsAdvanced communications of the 8 Series platform allows easy integration into processand electrical control systems for smoother asset monitoring and control. Advanced, flexible and embeddedcommunications: IEC 61850 Ed2,IEC 62439/PRP, Modbus RTU & TCP/IP,DNP3.0, IEC 60870-5-104Key Benefits Single setup and configuration across theplatform Comprehensive motor protection for medium and large induction motors Elimination of electrolytic capacitors Advanced motor diagnostics with high-end fault and disturbance recording Field swappable power supply High-end cyber security such as AAA, Radius, RBAC, and Syslog helps enable NERC CIPrequirements Enhanced relay draw-out construction Draw-out design simplifies testing and increases process uptimeExceptional Quality & Reliability Wi-Fi connectivity minimizes system configuration and facilitates quick/easy relayprogramming and diagnostic retrieval IPC A-610-E Class 3 manufacturing standards Monitored environmental conditions helps reduce system downtimeKey Applications Wide range of motor applications for oil & gas, mining & metals, cement,and wastewater Comprehensive protection and management of medium to large motors; two-speed,VFD-driven, cyclic loading and synchronous motors Highest reliability standards for electronicstesting 100% Environmental Stress Screening and fullfunctional testing Rated for IP54 (front) applications Standard Harsh Environment ConformalCoating Specific and advanced features for high inertia loads and reduced-voltagestarting motorsUncompromising Service &Support Stator protection of medium to large synchronous motors where field functions areprovided by excitation panels Covered under GE’s 10 year warranty plan Advanced predictive motor diagnostics and motor health visualizationgimagination at work Designed, tested and manufactured by GE
Multilin 869 – Motor Protection SystemMultilin 8 Series Platform OverviewFrom oil pumping and refining facilities, to open pit or undergroundmining and processing operations, to distribution utilities, companiesdemand solutions that ensure maximum process uptime, minimumoperational and maintenance efforts, and have the durability towithstand harsh environmental conditions.The Multilin 8 Series is GE’s next-generation protection and control relayplatform designed for industrial and distribution utilities. The platformprovides comprehensive protection and asset monitoring for criticalfeeders, motors, generators, and transformers.Multilin 8 Series Platform - Application Example2The 8 Series is designed to solve the challenges that customers face inrunning their day-to-day operations including maximizing system andprocess uptime, simplifying system integration and maintenance, andextending the life of critical assets. Utilizing advanced design practices,superior technology (elimination of all electrolytic capacitors), andstate-of-the art test and manufacturing facilities, GE is raising the baron system performance and reliability.With advanced communications the 8 Series integrates easily andseamlessly into your new or existing control system, along with yourother Multilin protection devices, providing a comprehensive solution forthe end-to-end electrical system within your operations.GEDigitalEnergy.com
Multilin 869 – Motor Protection SystemExceptional Quality & ReliabilityPioneering Technology & DesignIndustry-leading quality, reliability and design processes are at thecore of GE’s next generation protective relay platform. With significantinvestments in state-of-the-art type test facilities that simulate acomplete range of operating environments and manufactured to the IPCA-610 Class 3 standard, adhering to the highest reliability standards andensuring rugged performance, each device completes EnvironmentalStress Screening prior to shipping from GE’s facility.The Multilin 869 is part of the 8 Series platform that providescomprehensive, high performance protection and control for feeder,motor, transformer and generator applications.The Multilin 8 Series Protection Relays are manufactured in an ISO 9001:2008 certified manufacturing facility.The Multilin 869 Motor Protection System offers a powerful solution forcritical motor protection applications with advanced thermal model andvoltage dependant curves for high inertial loads.Utilizing decades of experience in motor protection, GE has implementedease-of-use features, such as single screen set-ups delivering fastermotor configuration and startup and motor health reports providingdetailed motor diagnostic enabling quick and easy identification ofmotor issues.GEDigitalEnergy.com3
Multilin 869 – Motor Protection SystemMultilin 869 OverviewThe Mutilin 8 Series products have an integrated protection integrityengine that utilizes customized algorithms, providing advanceddiagnostics to ensure asset protection is not compromised.Motors are the workhorses of any industrial plant. Industrial facilitiesdepend on reliable and secure motor operation to keep their processesrunning. Regardless of the type of motor, the load it runs or the processrequirements, a fully integrated protection and control scheme is criticalto maintaining uninterrupted service to the entire facility.Maintaining and safeguarding the electrical supply of an operation iscritical to ensuring maximum process availability and performance.The 8 Series incorporates the latest cyber security features, includingpassword complexity, RADIUS authentication and role-based accesscontrol (RBAC), enabling customers to comply with NERC CIP and NISTIR7628 requirements.The Multilin 869 Motor Protection System is a protection device designedfor the management , protection and control of medium to largehorsepower motors. The 869 provides comprehensive protection andcontrol of various types of motors with different loads they run.Understanding that customers need protection and control devicesthat must reliably operate in harsh and challenging environments,GE delivers the Multilin 8 Series with harsh conformal coating on allprinted circuit boards and a patented environmental awareness modulethat provides real-time detection of environmental factors that affectproduct life, as part of its standard offering, delivering higher reliabilityand extended relay life.The 869 relay offers the ideal solution for protecting, monitoring andcontrolling motors from disturbances or faults. With a fast protectionpass, running every 1/8th of a cycle, the 869 relay provides fastercurrent, voltage, power and frequency protection elements. Supportingthe latest in industry standard communication protocols, including IEC62439/PRP and IEC 61850 Ed2, the Multilin 869 relay easily integratesinto new or existing networks.Uncompromised Reliability & ServiceThe 869 is an advanced motor protection relay that provides highperformance protection, high-density I/O, extensive programmablelogic and flexible configuration capabilities. With protection and controllogic, the 869 allows for simplified coordination with upstream anddownstream disconnect devices. The 869 also offers enhanced features,such as diagnostics, preventative maintenance, condition monitoring,security, and advanced communications options.Designed, manufactured and tested to industry standards at our stateof-the-art facilities, the Multilin 8 Series delivers maximum performancefor today’s most demanding environments.In addition to the superior technology and innovative designadvancements that enable delivery of uncompromised performanceand reliability, the Multilin 8 Series is also backed by GE’s 10 yearwarranty plan.124341Field Swappable Power Supply2Harsh Environment Conformal Coating3No Electrolytic CapacitorsExtends the usable life of the protection relay and minimizescostly, time consuming replacement and re-configuration.Standard on all printed circuit boards delivering higher reliabilityand extended relay lifeIncreasing quality and reliability for continuous plant operations564IPC A-610 Class 3 Manufacturing5Robust Extruded Aluminum Chassis6Draw-OutGEDigitalEnergy.comDrives to the highest level of reliability standardsdelivering rugged performanceCustom-designed extruded aluminum chassisdelivering optimal thermal management to extendcomponent lifeProviding simplified device fleet management
Multilin 869 – Motor Protection SystemProtection & ControlStator DifferentialAs part of the 8 Series family, the Multilin 869 provides superiorprotection and control. The 869 offers comprehensive protection andcontrol solutions for medium and large motors for various applications.It contains a full range of selectively enabled, self contained protectionand control elements.Motor Thermal ModelMany motor failures are directly or indirectly related to, or causedby, extensive heating of the different motor parts involved inelectromechanical operation. Proven through several generations ofGE’s Multilin motor relays, an enhanced thermal model is used in the869 relay with seven major features: Motor thermal limit curves - NEMA standard, voltage dependentand customized motor curvesDifferential protection is considered as the first line of protection forinternal phase-to-phase or phase-to-ground faults for medium andlarge motors to provide sensitive and fast clearing protection againstwinding faults including turn-to-turn faults. The Multilin 869 providestwo flavors of the stator current differential protection:Traditional dual slope percent differential enhanced with CT saturationdetection and directional check for both AC and DC saturation providingexceptional security without sacrificing sensitivity.Core balanced differential protection enhanced with biasing duringmotor starting to inhibit differential protection during motor startingwhen inrush currents may upset differential protection.All differential values are available in metering and oscillographyallowing easy testing and troubleshooting. IEC 60255-8 thermal overload curves Smoothing filter for cyclic loads Current unbalance biasing Independent running and stopped exponential cooling curves Optional RTD biasing of the thermal model to adapt to real-timetemperature measurements Compensation for hot/cold motor conditionThe flexibility of the Multilin 869 thermal models will allow proper setup and performance for applications, including high inertia and cyclicloads.Multilin 869 Stator DifferentialTwo-CT set and Core-Balanced configurationsMultilin 869 – Advanced Thermal ModelHigh inertia overload curves sample,8500HP, 13.2kV, Reactor coolant PumpGEDigitalEnergy.com5
Multilin 869 – Motor Protection SystemVFD-Driven MotorsThe Multilin 869 provides protection for motors fed through VFDs(Variable Frequency Drives). A wide range of the frequency tracking(3-72Hz) allows the 869 to track the motor frequency and adjust itssampling rate to accurately measure phasors. An advanced algorithmallows switchable current and voltage tracking in case VFD is bypassed.To provide even more accurate phasor measurement, there is anoption that filters ripples in phasors due to harmonics for major motorfunctions. Additionally, users may indicate a starting VFD frequencythat helps the device to track the motor frequency faster and eliminateunnecessary delay in the averaging filter during motor startup that cancause delayed protection operation during motor failures.Reduced Voltage StartingThe Multilin 869 can control the transition of a reduced voltage starterfrom reduced to full voltage based on “Current Only”, “Current andTime”, or “Current or Timer”. During this process, the relay continuouslymonitors the motor current to ensure an effective transition.Multilin 869 – VFD Driven Motor Protection with or without bypass switchFunctional Block DiagramDEVICE #6FUNCTIONDEVICE #FUNCTIONDEVICE #14Under speed50PMechanical Jam19Motor Starter50PMotor Overload Alarm27PPhase Undervoltage50PMotor Short Circuit32PDirectional Power37Undercurrent50P/N/G37PUnderpower50 238Bearing Temperature46Current Unbalance474951VFUNCTIONDEVICE #FUNCTIONVoltage Restrained Phase TimeOvercurrent67PPhase Directional Overcurrent55Power Factor67NNeutral Directional OvercurrentPhase OvervoltageOver/Under frequencyPhase/Neutral/GroundInstantaneous Overcurrent59P81 O/U59NNeutral Overvoltage86Lock-outNegative SequenceInstantaneous Overcurrent59 2Negative Sequence Overvoltage87SPercent DifferentialAcceleration TimeAuxiliary OvervoltageFuse Failure50LR59XVTFFPhase/Neutral/Ground TimeOvercurrent66Maximum starting rateVoltage Reversal51P/N/G66Time Between StartsThermal Model51GMotor Ground FaultGEDigitalEnergy.comRTD ProtectionThermal Inhibit
Multilin 869 – Motor Protection SystemTwo-Speed Thermal ModelUnderpower ProtectionThe two-speed motor protection feature allows for the protectionof motors that can operate at two different speeds. The algorithmintegrates the heating at each speed into one thermal model.The Underpower element in the 869 is based on the three-phasereal power (kW) measured from the phase currents and voltages.Underpower may be used to detect loss of load conditions. This maybe used for more sensitive detection of load loss or pump cavitation ordetecting process related issues.The Multilin 869 automatically determines which settings should beactive at any given time considering a transition from speed one tospeed two within a period of time. The device has all required logic andtime delays to safely transfer speeds.Voltage and Frequency ProtectionThe voltage and frequency protection functions detect abnormal systemconditions like over/under voltage, over/under frequency and/or phasereversal that are potentially hazardous to the motor.Undercurrent ProtectionThe undercurrent protection element provides the ability to trip themotor due to external conditions that can cause the load being drivenby the motor to drop below a pre-set level. This function is used toprotect pumps from loss of suction, fans from loss of airflow due to aclosed damper or a conveyor system due to a broken belt.Motor Start SupervisionProtection of Motors with High-Inertia LoadsThe voltage dependent overload curve feature is tailored to protectmotors which are used in high inertia load applications.Voltage is continually monitored when the motor is started and duringacceleration. The thermal limit curve is then adjusted accordingly. Thisenables the Multilin 869 to distinguish between a locked rotor condition,an accelerating condition and a running condition.RTD ProtectionMotor start supervision consists of the following features: TimeBetween-Starts, Start-per-Hour, Restart Time and Start Inhibit. Theseelements are intended to guard the motor against excessive startingduty, which is normally defined by the motor manufacturer in additionto the thermal damage curves. The Emergency Restart enables the userto reset the Motor start supervisions in case of process needs.The start inhibit function prevents the starting of a motor when themotor is too hot and does not have a sufficient amount of thermalcapacity available to allow a start without being tripped offline. In caseof emergency, the thermal capacity used and motor start supervisiontimers can be reset to allow a hot motor to start.The Multilin 869 supports up to 12 programmable RTD inputs that can beconfigured for an Alarm or Trip. The RTD voting option gives additionalreliability to ignore any RTD failures.The RTDs can be assigned to a group for monitoring the stator, bearingand ambient temperatures.RTD Bias MaximumRTD Thermal Capacity Used (%)1009080706050403020RTDBias Center PointRTDBias Minimum100-50050100150200250Maximum Stator RTD Temperature ( C)RTD bias curveGEDigitalEnergy.com7
Multilin 869 – Motor Protection SystemBreaker Failure ProtectionThe breaker failure protection element monitors for timely operation ofthe connected breaker. If a trip command is not successful in operatingthe breaker and clearing the fault, the breaker failure element can beused to send trip signals to upstream breakers to clear the fault.10000TYPICAL CUSTOM CURVE - 6500 HP, 13800 VOLTINDUCED DRAFT FAN MOTORMechanical Jam and Acceleration TimeThese two elements are used to prevent motor damage during abnormaloperational conditions such as excessively long acceleration time orstalled rotors. The mechanical jam element senses increased loadingassociated with process or load related faults such as an overloadedconveyor.10001TIME TO TRIP IN SECONDSThe Multilin 869 protects the motor from overheating in cases ofabnormal loading during motor starts. The motor can be tripped if themotor does not reach a running condition within the programmablemotor acceleration time.Synchronous Motor ProtectionFor synchronous motors with excitation system control that offersfield winding protection, the Multilin 869 offers comprehensive statorprotection functions in addition to features such as power factor basedpull out protection and reactive power based alarm and trip functions.21003104Adaptive Protection5The Multilin 869 offers effective, reliable management of motors. Withdynamic, sensitive settings, the 869 provides secure and dependableprotection. With six setting groups, the 869 provides the sensitivesettings range and groups required to ensure no compromise is made tomeet changing system conditions. These setting groups can be enabledautomatically or manually via digital Inputs, virtual inputs or remotecommunications to address system needs, ensuring greater systemreliability and efficiency.1.00.10.51.010100MULTIPLE OF PER UNIT CURRENTFlexCurves For applications that require greater flexibility, FlexCurves can be usedto define custom curve shapes. These curves can be used to protectmotors with different rotor and stator damage curves, allowing completeprotection over the total motor capacity.1PROGRAMMED FLEXCURVE2RUNNING SAFETIME (STATOR LIMIT)3ACCELERATION SAFETIME (ROTOR LIMIT)4MOTOR CURRENT @ 100% VOLTAGE5MOTOR CURRENT @ 80% VOLTAGETypical FlexCurve overload curve.Advanced AutomationThe Multilin 869 incorporates advanced automation capabilities thatexceeds what is found in most motor protection relays. This reduces theneed for additional programmable controllers or discrete control relaysincluding programmable logic, communication, and SCADA devices.Advanced automation also facilitates the Multilin 869 to integrateseamlessly with other protection/process systems.FlexLogic FlexLogic is the powerful programming logic engine that provides theability to create customized protection and control schemes, minimizingthe need and associated costs of auxiliary components and wiring.Using FlexLogic, the 869 can be programmed to provide the requiredtripping logic along with custom scheme logic for motor breaker control8GEDigitalEnergy.com
Multilin 869 – Motor Protection System(including interlocking with internal motor start supervision), interlockingschemes with adjacent protections (for example, preventingsympathetic tripping of healthy feeders), and dynamic setting groupchanges.health while in operation. The advanced Motor Current SignatureAnalysis (MCSA) continuously analyzes the motor current signature andbased on preset algorithms will determine when a broken rotor bar ispresent in the motor.With fully programmable alarms, the broken rotor bar funct
GE’s Multilin motor relays, an enhanced thermal model is used in the 869 relay with seven major features: Motor thermal limit curves - NEMA standard, voltage dependent and customized motor curves IEC 60255-8 thermal overload curves Smoothing filter for cyclic loads Current unbalance biasing
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