REF 54_ Product Guide - ABB Oy Distribution Automation - #5

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Feeder Terminal REF 541, REF 543, REF 545. 1MRS750443-MBG and reactive power and power factor. In addition, other measurement functions are available. As a standard feature the REF 54_ terminal includes pulse counter inputs. The number of pulse inputs varies from 7 (REF 541) to 10 (REF 545) according to the REF variant. MIMIC configuration picture displayed on the HMI. Position indicators are used to indicate the position of switching devices via the MIMIC picture and to control them locally. The status of different objects, e.g. open/ close/undefined, displayed in the MIMIC view can be freely designed. Disturbance recorder The transient disturbance recorder is able to record 16 current or voltage waveforms and 16 logic digital signals. The sampling frequency of the analogue inputs is 2 kHz at the rated frequency of 50 Hz and 2.4 kHz at the rated frequency of 60 Hz. The user can set the length of a recording within a range determined by the number of analogue inputs used. The number of recordings depends on the sampling frequency, length of recordings and number of analogue inputs. The recordings can be uploaded with a DRCollector Tool which converts the data to a COMTRADE format. The DR-Collector Tool is supported in CAP501 and CAP505 relay tools. Fault locator The fault locator function for radial distribution systems. Short-circuit localization in all kind of distribution networks. Earth-fault localization in effectively earthed networks and in low reactance/low resistance earthed networks. Assists fast power restoration after the fault. Improves system availability and performance. Condition monitoring functions Condition monitoring function blocks such as supervision of the energizing current and voltage input circuit, operation time counter, circuit breaker electric wear, scheduled maintenance, trip circuit supervision and breaker travel time are available for the REF 54_ feeder terminals. General functions Power quality functions Power quality functions enable measurement of total harmonic distortion (THD) of voltage and current, and total demand distortion (TDD) of current. Individual harmonics are measured up to 13th. Power quality functions also include measurement of short duration voltage variations like sags, swells and short interruptions. Measurements are done according to the IEC standard 61000-4-30. LIB 510 supports tools for presentation of harmonics and short duration voltage variations. Additional functions are available for different general purposes to be used in logics such as activation of HMI backlight, switchgroups, and resetting of operation indications, latched output signals, registers and disturbance recorder. Communication functions The REF 54_ feeder terminal provides the IEC 60870-5-103, IEC 61850, ProfibusDPV1, Modbus, DNP 3.0, SPA and LON serial communication protocols. In a customer-specific feeder terminal configuration, special events can be generated via an EVENT230 event function. Control functions The control functions are used to indicate the position of switching devices, i.e. circuit breakers and disconnectors, and to execute open and close commands for controllable switching devices in the switchgear. Furthermore, there are supplementary functions for control logic purposes, e.g. on/off switches, MIMIC alarm, LED control, numerical data for the MIMIC and logic controlled position selection. The control functions configured using the Relay Configuration Tool can be associated with position indicators that are part of the Standard functions Standard functions are used for logics such as interlocking, alarming and control sequencing. The use of logic functions is not limited and the functions can be interconnected with each other as well as with protection, measurement, power quality, control, condition monitoring and general functions. In addition, the digital inputs and outputs as well as LON inputs and outputs can be connected to standard functions by using the Relay Configuration Tool. 5