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Voltage and frequency protection0 pages
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F»ORION ITALIA | |||||||||||||||||||||||||
VPR-A Voltage - Frequency Monitoring & Protection | |||||||||||||||||||||||||
VPR-A | |||||||||||||||||||||||||
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POINTS LJ VlLUtS LJ | |||||||||||||||||||||||||
Voltage and Frequency Protection for Feeders and AC Machines | |||||||||||||||||||||||||
DESCRIPTION The voltage protection relay VPR-A has been designed to measure the line or phase RMS voltage, frequency and unbalance under normal condition or under disturbances. This information is internally processed by the microprocessor, to take the voltage protection actions defined under ANSI or IEC standards. The different functions provided by the VPR-A may be classified into the following groups: | |||||||||||||||||||||||||
APPLICATIONS | DIGITAL MEASUREMENT | ||||||||||||||||||||||||
Protection of generators, motors and transformer against adverse system voltage conditions. Ground fault detection 59N. Supervision of automatic transfer switching schemes. | RMS line and phase voltages. Homopolar voltage. Voltage unbalance. Average voltage. System frequency. Phase sequence. | ||||||||||||||||||||||||
PROTECTION AND FUNCTIONALITY ٕ (27t/27i) Timed and instantaneous undervoltage. (27r) Residual undervoltage. Օ (46) Voltage unbalance. (47) Phase reversal Օ (59t/59i) Timed and instantaneous overvoltage. (59N) Homopolarvoltage. Օ (81) Underfrequency and Overfrequency. Five output relay programmable. Օ Control power drop or internal fault relay. | SIGNALLING AND PROGRAMMING LED and LCD display indication. Օ Touchpad programming. Indication and storage of fault condition and their values. Օ Undervoltage, overvoltage, unbalance, frequency pickup indications. System status. Օ Output relays status. | ||||||||||||||||||||||||
APPLICABILITY COMMUNICATION Systems: Mono phase and 3 or 4-wire Remote communication using a PC or PLC by 1 three phase systems RS232 °r 2 RS485. Frequency 50and60Hz Օ Remote programming of the setpoints. Voltage: 69kV maximum Remote breaker opening or closing. | |||||||||||||||||||||||||
Protection relay Quality certified ISO 9001:2000 vpr-a_gbbr_050805 | |||||||||||||||||||||||||
