Phase and Ground Fault Protection Relay with Autoreclosure

On request: 2 automatic reclosure attempts

Features

• CT primary ratio selectable in 5 A steps (10 A to 6000 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 and trip failure
  

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



Communication

• Communication port: (1) RS232 and (2) RS485
  
• Remote programming of the setpoints
• Communication Protocol: Modbus RTU

Protection and Functionality

• (46) Negative sequence timed overcurrent
• (50) Instantaneous over-current
  
• (50N/50G) Instantaneous ground over-current
  
• (51) Inverse time phase over-current
  
• (51N/51G) Inverse time ground over-current
  
• (79) Auto-reclosure
  
• 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

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 50/50 N, 51/51 N

Current transformers