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Current monitoring and protection0 pages
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{g) ORION ITALIA | ||||||||||
TKIP \J SERVICE | ||||||||||
IPR-A Current Monitoring & Protection | ||||||||||
VALUES LJ | ||||||||||
Protection for Feeders, Generators & Industry | ||||||||||
DESCRIPTION The Current Protection Relay (IPR-A) has been designed to measure the line and ground RMS currents under normal conditions or under disturbances. The current signais are sensed throughout current transformers (CT) from each line. This information is internally processed by the microprocessor in order to take the current protection actions defined under ANSI, IAC or IEC standard. | ||||||||||
APPLICATIONS Primary and backup protection for utility feeder, power plants and industrial distribution systems. Օ Protection of transformers, overhead lines, cables and generators. Allow the opening of the switch/disconnector within the limits of its capacity, leaving the circuit interruption fuses in the case of short circuit. PROTECTION AND FUNCTIONALITY Օ (50) Instantaneous overcurrent. (50N/50G) Instantaneous ground overcurrent. Օ (51) Inverse time phase overcurrent (51N/51G) Inverse time ground overcurrent Օ ANSI, IAC or IEC/BS142 curves included: Moderately inverse. Normal inverse. Very inverse. Extremely inverse. Definite time. Overload alarm pickup level. Օ Accumulated kA per phase on breaker interruption. COMMUNICATION Remote communication using a PC or a PLC by 1 RS232 & 2 RS485 ports. Օ Remote programming of the setpoints. Protocol used: Modbus RTU. | FEATURES Օ CT primary ratio selectable in 5 A steps (10A to 5000 A). Line and ground RMS currents measurement. Օ 1 trip relay and 2 programmable auxiliary relay. Control power drop or internal fault relay. Օ Digital inputs: 1 breaker status & 3 programmable Touchpad programming Օ Breaker operation & trip failure SIGNALLING LED and LCD display indication. Օ Phase and ground current indication Last trip cause and storage of values Օ Indication and storage of fault conditions and their values. Threshold LED for 50/50N, 51/51N. ADDITIONAL FEATURES: (on request) Օ 3 Setpoints Group for Phase & Ground Protections Autoreclose with 2 shoots Օ Cold load pickup control APPLICABILITY Systems: Mono phase and 3 or 4- wire three phase system Frequency 50 and 60 Hz Voltage: 69 kV maximum | |||||||||
Protection relay Quality certified ISO 9001:2000 ipr-a_gbbrj»0805 | ||||||||||
