GE Multilin G60 Generator Management Relay 5-35 SETTINGS 5.1 OVERVIEW55.1.2 INTRODUCTION TO ELEMENTSIn the design of UR relays, the term ìelementî is used to describe a feature that is based around a comparator. The com-parator is provided with an input (or set of inputs) that is tested against a programmed setting (or group of settings) to deter-mine if the input is within the defined range that will set the output to logic 1, also referred to as ìsetting the flagî. A singlecomparator may make multiple tests and provide multiple outputs; for example, the time overcurrent comparator sets aPickup flag when the current input is above the setting and sets an Operate flag when the input current has been at a levelabove the pickup setting for the time specified by the time-current curve settings. All comparators, except the Digital Ele-ment which uses a logic state as the input, use analog parameter actual values as the input.Elements are arranged into two classes, GROUPED and CONTROL. Each element classed as a GROUPED element isprovided with six alternate sets of settings, in setting groups numbered 1 through 6. The performance of a GROUPED ele-ment is defined by the setting group that is active at a given time. The performance of a CONTROL element is independentof the selected active setting group.The main characteristics of an element are shown on the element logic diagram. This includes the input(s), settings, fixedlogic, and the output operands generated (abbreviations used on scheme logic diagrams are defined in Appendix F).Some settings for current and voltage elements are specified in per-unit (pu) calculated quantities:pu quantity = (actual quantity) / (base quantity)# REMOTE DEVICES# See page 5-170.# REMOTE INPUTS# See page 5-171.# REMOTE OUTPUTS# DNA BIT PAIRS See page 5-172.# REMOTE OUTPUTS# UserSt BIT PAIRS See page 5-172.# RESETTING# See page 5-172.# DIRECT INPUTS# See page 5-173.# DIRECT OUTPUTS# See page 5-173.## SETTINGS## TRANSDUCER I/O# DCMA INPUTS# See page 5-177.# RTD INPUTS# See page 5-178.# DCMA OUTPUTS# See page 5-178.## SETTINGS## TESTINGTEST MODEFUNCTION: Disabled See page 5-182.TEST MODE INITIATE:On See page 5-182.# FORCE CONTACT# INPUTS See page 5-183.# FORCE CONTACT# OUTPUTS See page 5-183.
