Functions
6-115
7SJ63 Manual
C53000-G1140-C120-1
Figure 6-51
Logic Diagram for Undervoltage Protection
6.11.2 Programming Settings
General
Voltage protection is only in effect and accessible if address
is set to
(QDEOHG
during configuration of protective functions. If the voltage protection function
is not needed, address
should be set to
'LVDEOHG
.
All setting values are based on phase-to-phase voltages. The setting ranges depend
on the type of voltage transformer connection utilized (specified at address
). For
voltage transformers connected in a grounded-wye configuration, higher setting val-
ues may be used because the voltage inputs are subjected only to phase-to-ground
voltage levels.
I>
'(/$<
T
0
%NU&ORVHG,0,1
27-2 TRIP
27-2 PU CS
„1“
&855(17683(59
V<
38
V<<
3,&.83
&
or
&
&
27-2 picked up
'(/$<
T
0
&
27-1 TRIP
27-1 PU CS
&
&
27-1 picked up
&
&
„1“
)&7
>BLOCK 27
>BLOCK 27-1
>BLOCK 27-2
or
27 BLOCKED
27 OFF
&
27 ACTIVE
0HDVXUHPHQW/RJLF
or
>27 I SUPRVSN
F# 6539
F# 6534
F# 6533
F# 6540
F# 6538
F# 6537
F# 6531
F# 6530
F# 6532
F#. 6503
F# 6508
F# 6506
F# 6505
20 ms
2))
21
2))
21
$ODUP2QO\
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