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6.9.2
Programming Settings
General
7SJ63 Manual
C53000-G1140-C120-1
#!!Ã#(ÃFA68UPS
#!$ÃDÃ6G6SH
#!"ÃUDH@Ã8PITU6IU
I
c
I
b
I
I >
a
dΘ
------- -
dt
φ
A
CB Closed
! !Ã7x…8yDÃHDI
I >
#!&ÃF‡A68UPS
τ
kτ
x
&ÃDÃHPUPSÃTU6SU
I >
F# 1503
>BLOCK 49 O/L
#! ÃA8UÃ#(
PAA
„1"
PI
6yh…€ÃPy’
#!'ÃUÃ@H@SB@I8`Ã
F# 1507
0
>EmergencyStart
Figure 6-45
Logic Diagram for Thermal Overload Protection
Thermal overload protection is only effective and accessible if address was set
to (QDEOHG during configuration of protective functions. If the thermal overload pro-
tection is not required, address should be set to 'LVDEOHG.
Transformers and cable are prone to damage by overloads which last for an extended
period of time. For this reason, fault protection elements such as the directional and
non-directional overcurrent elements should not be used to protect against overload.
1
1
2
-- - Θ
⋅
⋅
-- - I
+
=
τ
τ
Θ = const.
Θ = 0
or
or
T
or
Functions
F# 1515
or
49 O/L I Alarm
#!#Ã#(Ã
Ã6G6SH
Θ
F# 1516
Θ
49 O/L Θ Alarm
>
Θ
max
100 %
Θ
>
F# 1521
49 Th O/LTrip
&
F# 1517
&
49 Winding O/L
F# 1512
49 O/L BLOCK
F# 1513
49 O/L ACTIVE
F# 1511
49 O/L OFF
6-101
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