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User’s Guide
NPM800 – NPM800R
NPM800RE
Date : 05/2013
Edition :30/01/2014
Folio : 19
Indice : g
5.4 Phase/earth fault menu, after starting
This menu allows the setting of the phases and earth fault over current functions: setting in
and out of order, choice of the types of time delay and curves, adjustment of thresholds,
assignment of the output units.
This configuration must be carried out successively for each of the two settings groups if they
are to be used alternatively.
MAIN MENU
PHASE EARTH FLT.
Parameters of the ANSI 50, 51N
functions
SETTING
set 1
Choose the setting group
set 1 or set 2
SHORT CIRCUIT
Active
Choose Active to use the phase to
phase short-circuit function
Active or Inactive
SHORT CIRC.DELAY
0.06 s
Set the value of time delay of the
phase to phase short-circuit function
0.04 to 3 s
SHORT CIRC.THRES
3.0 * In
Set the threshold of the phase to
phase short-circuit function
3.0 to 12.0 * In
SHORT C.INST.REL
A B C D
Select relay to assign to the short-
circuit instantaneous function
See chap 4 to choose a relay
or to modify the assignment
SHORT C.INST.REL
E F G
(relays D, E, F, G if option
available)
SHORT C.TRIP.REL
A B C D
Select relay to assign to the short-
circuit trip function
See chap 4 to choose a relay
or to modify the assignment
SHORT C.TRIP.REL
E F G
(relays D, E, F, G if option
available)
EARTH FAULT
Active
Choose Active to use the earth fault
function
Active or Inactive
INHIBITION Io
Active
Choose Active to use the earth fault
function during the start
Active or Inactive
