Micom P631 - 3.24 Thermal Overload Protection (Function Group THRM1)

3.24 Thermal Overload Protection (Function Group THRM1)
The thermal overload protection function has been designed for overload
protection of transformers. The measured values to be monitored are selected
using a setting parameter.
THRM1:
Select. meas. input
[ 019 109 ]
0
1
0: End a
1: End b
0 , 1
62Z5079A
IA,a
IB,a
IC,a
IA,b
IB,b
IC,b
IP,max,y
IP,max,a
IP,max,b
COMP
COMP
Fig. 3-109: Selection of measured values for thermal overload protection
3.24.1 Enabling or Disabling Thermal Overload Protection
Thermal overload protection may be enabled or disabled using setting
parameters. Moreover, enabling can be carried out separately for each
parameter subset.
64Z5017A
Parameter
set 1
set 2
set 3
set 4
THRM1:
Enable PSx
081 070
082 070
083 070
084 070
THRM1:
Enabled
[ 039 129 ]
THRM1:
Enable PSx
[ * ]
1
0
0: No
1: Yes
0
0: No
1: Yes
THRM1:
General enable USER
[ 031 144 ]
1
Fig. 3-110: Enabling or disabling thermal overload protection
3 Operation
P631
P631/EN M/R-11-C // P631-310-650 3-145