This Competency Standard Unit shall/may be demonstrated in relation to the design of transmission, sub-transmission and zone substation protection and control components and may include the following equipment: Manufacturers recommendations; Reliability performance profiles; Knowledge of local history and experience; Consultation with other Authorities; Environmental influences; Present practices. Equipment includes; Sectionalisers, air break switches, capacitor banks, transformer taps, metering and protection equipment, data communication systems Primary and secondary voltage and current injection equipment; time delay measuring equipment; Current transformers; Voltage transformers; Power transformers; Tapchangers; Circuit breakers; Capacitor banks; Ring main units; Audio frequency load control; Circuit breaker auxiliary systems; Substation and metal structure earthing systems; SCADA interfaces and transducer inputs; local opto-isolated alarms: PLC programs; Auto Reclosers (ACRs); protection relays; metering; control circuits; Statistical metering systems; Frame leakage relays; Distance relays; Pilot wire relays; Transformer differential relays; Busbar differential relays; Impedance bus zone relays; Overcurrent and earth fault relays; Transformer neutral check relays; Circuit breaker fail relays; Multi-trip relays; Auto recloser relays; Voltage transformer failure relays; Surge protection relays; Buchholz relays; Winding temperature relays; Sensitive earth fault relays; Phase failure relays; Frequency relays; Load shedding relays; General protection LV devices; Oil temperature protection devices; Oil surge protection devices; Power supplies. differential relays; power systems; multi-facetted schemes; interactive overload schemes, distance protection (incorporating relay selection, switched/non-switched schemes; mutual coupling and teed feeder systems); protection signalling (incorporating series, direct, permissive, distance acceleration, block interruption); telecommunication circuits and equipment. AC protection circuits: HV FDRs, TFRs, BBP/LBU, LV FDRs DC protection and control circuits: Supplies and auxiliaries, protection, BBP, trip circuit monitoring, CB monitoring, serially communicated SCADA, control and indication Hard wire communicated SCADA TFR tap changer and cooling control circuits Power factor correction capacitor protection/control AC Supplies (415/240VAC) DC Supplies (125/48VDC) Indication lighting timer circuit Miscellaneous circuits may include: Metering, frequency injection, radio/communication, intertripping, frame leakage and SMU control Connection diagrams may incude: Control panels, HV circuit breakers,LV circuit breakers, Line and TFR CT's, TFR neutral CT's, Line VT's, TFR's, disconnectors, battery chargers, fire control panel, power factor and control caps. Other areas may include: Control panel layouts, control cable schedule and label list. The following constants and variables included in the element/Performance Criteria in this unit are fully described in the Definitions Section 1 of this volume and form an integral part of the Range Statement of this unit: |