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User’s Guide
NPM800 – NPM800R
NPM800RE
Date : 05/2013
Edition :30/01/2014
Folio : 22
Indice : g
5.6 Thermal overload menu
This menu allows the parameter setting of the thermal overload function: setting in and out
of order, type of thermal overload, adjustment of the thermal time-constant, adjustment of the
thermal trip and alarm thresholds, assignment of the output units for alarm and trip.
MAIN MENU
THERMAL IMAGE
Parameters of the thermal overload
option.
SETTING
set 1
Choose the setting group
set 1 or set 2
THERMAL OVERLOAD
Active
Choose Active to use thermal
overload function
Active or Inactive
HEATING CONST
40 mn
Set the value of the thermal overload
time-constant
4 to 64 minutes
COOLING CONST
4.0 * CST. ECHAUF
Set the cooling constant
1.0 to 6.0 * heating constant
START FACTOR
50 %
Set the coefficient calculation of the
thermal overload (starting mode)
50 to 100 %
NEG. SEQ. FACTOR
3
Set the negative sequence factor K
(thermal heating)
0 to 9
THERM THR. Iref
0.40 * In
Set the thermal reference current
Iref, used by thermal overload
function
0.40 to 1.3 x In
TH. TRIP RELAY
A B C D
Select relay to assign to the thermal
overload trip function
See chap 4 to choose a relay
or to modify the assignment
TH. TRIP RELAY
E F G
(relays D, E, F, G if option
available)
TH.ALARM THRESH
80 %
Set the thermal alarm threshold
80 to 100 %
