GE Multilin F60 Feeder Protection System 2-12 PRODUCT DESCRIPTION 2.1 INTRODUCTION22 PRODUCT DESCRIPTION 2.1INTRODUCTION 2.1.1 OVERVIEWThe F60 Feeder Protection System is a microprocessor based relay designed for feeder protection.Overvoltage and undervoltage protection, overfrequency and underfrequency protection, breaker failure protection, direc-tional current supervision, fault diagnostics, RTU, and programmable logic functions are provided. This relay also providesphase, neutral, ground and negative sequence, instantaneous and time overcurrent protection. The time overcurrent func-tion provides multiple curve shapes or FlexCurves™ for optimum co-ordination. Automatic reclosing, synchrocheck, andline fault locator features are also provided. When equipped with a type 8Z CT/VT module, an element for detecting highimpedance faults is provided.Voltage, current, and power metering is built into the relay as a standard feature. Current parameters are available as totalwaveform RMS magnitude, or as fundamental frequency only RMS magnitude and angle (phasor).Diagnostic features include a sequence of records capable of storing 1024 time-tagged events. The internal clock used fortime-tagging can be synchronized with an IRIG-B signal or via the SNTP protocol over the Ethernet port. This precise timestamping allows the sequence of events to be determined throughout the system. Events can also be programmed (viaFlexLogic™ equations) to trigger oscillography data capture which may be set to record the measured parameters beforeand after the event for viewing on a personal computer (PC). These tools significantly reduce troubleshooting time and sim-plify report generation in the event of a system fault.A faceplate RS232 port may be used to connect to a PC for the programming of settings and the monitoring of actual val-ues. A variety of communications modules are available. Two rear RS485 ports allow independent access by operating andengineering staff. All serial ports use the Modbus ® RTU protocol. The RS485 ports may be connected to system computerswith baud rates up to 115.2 kbps. The RS232 port has a fixed baud rate of 19.2 kbps. Optional communications modulesinclude a 10Base-F Ethernet interface which can be used to provide fast, reliable communications in noisy environments.Another option provides two 10Base-F fiber optic ports for redundancy. The Ethernet port supports IEC 61850, Modbus ® /TCP, and TFTP protocols, and allows access to the relay via any standard web browser (F60 web pages). The IEC 60870-5-104 protocol is supported on the Ethernet port. DNP 3.0 and IEC 60870-5-104 cannot be enabled at the same time.The F60 IEDs use flash memory technology which allows field upgrading as new features are added. The following singleline diagram illustrates the relay functionality using ANSI (American National Standards Institute) device numbers.Table 2–1: ANSI DEVICE NUMBERS AND FUNCTIONSDEVICENUMBERFUNCTION DEVICENUMBERFUNCTION25 (2) Synchrocheck 51P Phase time overcurrent27P (2) Phase undervoltage 51_2 Negative-sequence time overcurrent27X Auxiliary undervoltage 52 AC circuit breaker32 Sensitive directional power 59N Neutral overvoltage32N Wattmetric zero-sequence directional 59P Phase overvoltage50BF/50NBF Breaker failure 59X Auxiliary overvoltage50DD Disturbance detector 59_2 Negative-sequence overvoltage50G Ground instantaneous overcurrent 67N Neutral directional overcurrent50N Neutral instantaneous overcurrent 67P Phase directional50P Phase instantaneous overcurrent 67_2 Negative-sequence directional overcurrent50_2 Negative-sequence instantaneous overcurrent 79 Automatic recloser51G Ground time overcurrent 81O Overfrequency51N Neutral time overcurrent 81U Underfrequency
