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Multilin 750/760

Multilin 750/760
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Grid Solutions Multilin 750/760 Feeder protection system The 750/760 Feeder Protection System is a digital relay intended for the management and primary protection and control of distribution feeders. This easy to use relay provides comprehensive protection functions for feeders and back up protection for bus, transformers and transmission lines in a draw out construction and at a reduced product life cycle cost. • Directional time, instantaneous phase & ground overcurrent protection • Directional sensitive ground and Restricted Earth Fault protection • Reverse power protection • Synchro Check - V, f, Hz, & dead-source • Easy to use Feeder Protection System supported by industry leading suite of software tools • Automatic bus transfer or manual control • Accurate built-in metering functions - Eliminates auxiliary metering devices and reduces cost • 4 shot recloser (760 only) • Improve uptime of auxiliary equipment - I/O monitoring • Reduce troubleshooting time and maintenance costs - IRIG-B time synchronization, event reports, waveform capture, data logger • Minimize replacement time - Draw-out construction • Simplify testing - Built in simulation features • Cost effective access to information. Supports industry protocols such as DNP & Modbus. Includes an optional 10MB Ethernet port for system integration • Complete asset monitoring - Analog I/O, Full metering including demand & energy • Leading edge technology - Flash memory for product field upgrade • Extended life - Optional conformal coating for chemically corrosive and humid environments • Globally accepted ensuring adherence to international codes and standards Applications • Primary protection and control for distribution feeders on solidly grounded, high impedance grounded or resonant (Peterson Coil) grounded systems • Bus blocking/Interlocking schemes • High-speed fault detection for arc flash mitigation • Throw over schemes (bus transfer scheme applications) • Load shedding schemes based on voltage and frequency elements • Back-up protection for transmission lines, feeders and transformers • Distributed Generation (DG) interconnect protection Communications • Networking interfaces - 10Mbps Ethernet, RS232, RS485 and RS422 ports • Ethernet port, 10Mbps • Multiple protocols - ModBus™ RTU, TCP/IP, DNP 3.0 Level 2 Monitoring & Metering • Metering - current, voltage, sequence components, power, energy, voltage • Breaker operation & trip failure • Total breaker arcing current • Ambient temperature /analog transducer input • Oscillography & Data Logger - 10 records up to 32 power cycles • Simulation mode and playback capability EnerVista Software • State of the art software for configuration and commissioning Multilin products • Document and software archiving toolset to ensure reference material and device utilities are up-to-date • EnerVista™ Integrator providing easy integration o

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Extremely Inverse The 750/760 Feeder Protection System is a digital relay intended for the management and primary protection and control of distribution feeders. This easy to use relay provides comprehensive protection functions for feeders and back up protection for bus, transformers and transmission lines at a reduced product life cycle cost. Very Inverse Normally Inverse Moderately Inverse Definite Time Short Inverse Time & Instantaneous Overcurrent Extreme Inverse The 750/760 has two phase TOC elements with level detectors for each phase. The 750/760 also has two overcurrent elements...

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elements. This means the 750/760 can be used to provide sensitive tripping for faults in one direction. Typical applications for directional overcurrent include: • Isolation of the faulted feeder in ring bus or parallel feeder arrangements. • Prevention of back-feeding utility source fault from industrial plant generators • Sensitive hi-speed ground protection of transformers Sensitive ground and Restricted Earth Fault (REF) protection Sensitive ground and RGF protection features provide sensitive detection of ground faults. Sensitive ground fault protection includes: • Instantaneous (50N)...

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Synchronism Check Breaker closing can be supervised by ∆V, ∆f and ∆Hz setpoints. Dead-source alternatives are provided. Cold Load Pickup Control This function allows automatic or manual blocking or raising of trip settings for a period after the breaker is closed. Built-in scheme available to perform main-tie-main transfer using a set of three relays, two on incoming and one on a normally open bus tie breaker. This scheme uses “ open before close “ sequence for safe operation. Manual Close Control After the breaker is closed manually, the relay can block any IOC element or raise the pickup...

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Access Security The 750/760 performs accurate measure ment of the following: The 750/760 features user-configurable inputs and outputs: The 750/760 has eight electromechanical relay outputs. The 750/760 can be protected against unauthorized setpoint changes. A key switch may be installed on the rear terminals to allow setpoint changes from the front panel. An optional passcode restricts setpoint changes from both the front panel and ports. • Two are factory programmed for breaker control EnerVista Software • Actual V, A, Hz, W, Wh, var, varh, VA‑PF • Watthour cost • Phasor presentation of V...

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Viewpoint Monitoring Viewpoint Monitoring is a simple-to-use and full-featured monitoring and data recording software package for small systems. Viewpoint Monitoring provides a complete HMI package with the following functionality: • Plug-&-Play Device Monitoring • Trending Reports • System Single-Line Monitoring & Control • Automatic Event Retrieval • Annunciator Alarm Screens • Automatic Waveform Retrieval Retrofit Existing Multilin SR 750 Devices in Minutes Traditionally, retrofitting or upgrading an existing relay has been a challenging and time consuming task often requiring...

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Multilin 750/760
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