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MV Secondary Relays

Microprocessor (With Double Sets )Over Current, Short-Circuit, Earth Leakage Relay

Protection Functions

F50/51, F50N/51N, F51BF, F68

Programmable three phase over current with time curve and earth leakage relay expedients to MV&;HV energy transmission and distribution systems.

Its phase and neutral current inlets can be selected as 1 A or 5A.

Inlet circuit of neutral current has got an active filter which percolates the 3. Harmonic.

There are two programs which can be selected by digital input or serial port.



Technical Features

  • 3 pieces of over current protection level
  • 3 pieces of earth leakage short-circuit protection
  • Selectable program with double sets
  • Time labeled failure record
  • Programmable outlet relays
  • Blockage inlet and outlet of program for selectivity at pilot line
  • Circuit breaker failure protection
  • Mod-bus communication protocol
  • UL/CSA listing


 

 
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