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Instrument transformer, Generator, Digital controller, Differential relay, Under voltage relay
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{g) ORION ITALIA
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 TKIP \J SERVICE
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IPR-A
Current
Monitoring & Protection
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VALUES LJ
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Protection for Feeders, Generators & Industry
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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.
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APPLICATIONS
Primary and backup protection for utility feeder, power plants and industrial distribution systems.
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
(50) Instantaneous overcurrent.
(50N/50G) Instantaneous ground overcurrent.
(51) Inverse time phase overcurrent
(51N/51G) Inverse time ground overcurrent
ANSI, IAC or IEC/BS142 curves included:
Moderately inverse. Normal inverse. Very inverse. Extremely inverse. Definite time.
Overload alarm pickup level.
Accumulated kA per phase on breaker interruption.
COMMUNICATION
Remote communication using a PC or a PLC by 1 RS232 & 2 RS485 ports.
Remote programming of the setpoints.
Protocol used: Modbus RTU.
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FEATURES
CT primary ratio selectable in 5 A steps (10A to 5000 A).
Line and ground RMS currents measurement.
1 trip relay and 2 programmable auxiliary relay.
Control power drop or internal fault relay.
Digital inputs: 1 breaker status & 3 programmable
Touchpad programming
Breaker operation & trip failure
SIGNALLING
LED and LCD display indication.
Phase and ground current indication
Last trip cause and storage of values
Indication and storage of fault conditions and their values.
Threshold LED for 50/50N, 51/51N.
ADDITIONAL FEATURES: (on request)
3 Setpoints Group for Phase & Ground Protections
Autoreclose with 2 shoots
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
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Protection relay
Quality certified ISO 9001:2000 ipr-a_gbbrj»0805
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