The set value for the Time dial parameter is derived from the time-grading chart that has been prepared for
the electrical power system. Where no time grading and therefore no displacement of the characteristic curve
is required, leave the Time dial parameter set to 1.
Parameter: Reset
•
Default setting (_:115) Reset = disk emulation
You use the Reset parameter to define whether the stage drops out according to the dropout characteristic
curve (in accordance with the behavior of a disk emulation = rotor disk) or instantaneously.
Parameter Value Description
disk emulation
In the case of this setting, a dropout characteristic curve has to be set in
addition to the operate curve.
Select this setting if the device is coordinated with electromechanical
devices or other devices which perform a dropout after a disk emulation.
instantaneous
Use this setting if the dropout is not to be performed after disk emulation
and an instantaneous dropout is desired instead.
Parameter: Current/time value pairs (of the dropout characteristic curve)
Use these settings to define the characteristic curve. Set a current/time value pair for each characteristic-curve
point. The setting depends on the characteristic curve you want to realize.
Set the current value as a multiple of the threshold value. Siemens recommends that you set the Threshold
parameter to 1.00 in order to obtain a simple relation. You can change the threshold value setting afterwards
if you want to displace the characteristic curve.
Set the time value in seconds. The characteristic curve is displaced using the Time dial parameter.
NOTE
The value pairs must be entered in continuous order.
Settings
Addr.
Parameter C Setting Options Default Setting
General
_:1 User curve #:Mode
•
off
•
on
•
test
off
_:2 User curve #:Operate &
flt.rec. blocked
•
no
•
yes
no
_:110 User curve #:Directional
mode
•
forward
•
reverse
forward
_:8 User curve #:Method of
measurement
•
fundamental comp.
•
RMS value
fundamental
comp.
_:112 User curve #:Non-direc-
tional pickup
•
no
•
at volt.< & mem.empty
at volt.< &
mem.empty
_:109 User curve #:Directional
comparison
•
no
•
yes
no
_:111 User curve #:Release via
input signal
•
no
•
yes
no
_:10 User curve #:Blk. by
meas.-volt. failure
•
no
•
yes
yes
_:26 User curve #:Dynamic
settings
•
no
•
yes
no
6.6.6.3
Protection and Automation Functions
6.6 Directional Overcurrent Protection, Phases
430 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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