Siemens 6MD85, Руководство пользователя

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With the
Rated normal current
parameter, you set the primary current which serves as a reference for
all current-related % values within the Circuit-breaker function group. This applies both for operational meas-
ured values and for setting values in %.
Enter the primary rated current of the protected object (for example, the line) here.
If the device works with the IEC 61850 protocol, then you change only the setting value of the parameter via
DIGSI 5 and not directly on the device. If you change the setting value directly on the device, then the
IEC 61850 configuration of the metered values can be faulty.
Parameter: Rated voltage for % values
•
Default setting
(_:2311:102) Rated voltage
=
400 kV
With the
Rated voltage
parameter, you set the primary voltage, which serves as a reference for all
voltage-related % values within the Circuit-breaker function group. This applies both for operational measured
values and for setting values in %.
Enter the primary rated voltage of the protected object (for example, the line) here.
If the device works with the IEC 61850 protocol, then you change only the setting value of the parameter via
DIGSI 5 and not directly on the device. If you change the setting value directly on the device, then the
IEC 61850 configuration of the metered values can be faulty.
Parameter: Current threshold circuit breaker open
•
Default setting
(_:2311:112) Current thresh. CB open
=
0.10 A
With the
Current thresh. CB open
parameter, you specify the threshold value below which the circuit-
breaker pole or the circuit breaker is recognized as open.
Set the
Current thresh. CB open
parameter so that the current measured when the circuit-breaker pole
is open will certainly fall below the parameterized value. If parasitic currents (for example, due to induction)
are excluded with the line deactivated, you can make a secondary setting of the value with a high degree of
sensitivity, to
0.05 A
for example.
If no special requirements exist, Siemens recommends retaining the setting value of
0.10 A
for secondary
purposes.
Parameter: 1-pole operate allowed
•
Default setting
(_:2311:113) 1-pole operate allowed
=
yes
With the
1-pole operate allowed
parameter, you specify whether 1-pole operate is permitted or
whether only 3-pole operate should be carried out.
Parameter Value Description
yes
The 3-pole coupling in the Trip logic function block (see 5.6.4.1 Function
Description ) decides whether the current phase-selective pickup results in a 1-
pole or a 3-pole operate command.
The basic prerequisite for 1-pole tripping is the existence of permission for 1-
pole operate by the Automatic reclosing function.
1-pole operate is therefore only practical on overhead lines. The circuit breakers
for these lines must be suitable for 1-pole operate at both ends.
no
The function always causes 3-pole operate of the circuit breaker.
Trip Logic
Function Description
The Trip logic function block receives the pickup and group operate indications from the Protection-function
group or Protection-function groups and forms the protection trip command that is transmitted to the Circuit-
breaker function block. A 3-pole operate indication can also come from automatic reclosing (AR) (if tripping
was initiated for 1-pole and AR cannot reclose).
5.6.4
5.6.4.1
Function-Group Types
5.6 Function-Group Type Circuit Breaker, 1-/3-Pole
230 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017