Siemens 6MD86 - Settings; Information List; Circuit Breaker; Overview

Parameter Value Description
with I<
With this setting, the trip command is reset as soon as the current is removed,
provided the tripping function has dropped out. The most important factor for
recognition of the open circuit breaker is the current falling short of the value
set in the parameter (_:2311:112) Current thresh. CB open.
with I< &
aux.contact
For this setting not only the current has to be removed, but also the circuit-
breaker auxiliary contact has to report that the circuit breaker is open. This
setting assumes that the setting of the auxiliary contact has been routed via a
binary input (for more information, see 5.5.7.3 Acquisition of Circuit-Breaker
Auxiliary Contacts and Further Information).
with dropout
The setting can be selected for special applications in which the trip command
does not result in complete interruption of the current in every case. In this
case, the trip command is reset if the pickup of the tripping protection function
drops out.
The setting is useful if the load current in the system cannot be interrupted
during the protection device test and the test current is fed in parallel with the
load current.
Settings
Addr. Parameter C Setting Options Default Setting
Trip logic
_:103 Trip logic:Reset of trip
command
•
with I<
•
with I< & aux.contact
•
with dropout
with I<
Information List
No.
Information Data Class
(Type)
Type
Trip logic
_:300 Trip logic:Trip indication ACT O
Circuit Breaker
Overview
The Circuit-breaker function block represents the physical switch in the SIPROTEC 5 device.
The basic tasks of this function block are the operation of the circuit breaker and the acquisition of the circuit-
breaker auxiliary contacts and other circuit-breaker information.
The Circuit-breaker function block provides information about:
•
Number of switching cycles
•
Breaking current, breaking voltage, and breaking frequency
•
Summation breaking current
Tripping, Opening, and Closing the Circuit Breaker
The circuit breaker is operated in the following situations:
•
Tripping of the circuit breaker as a result of a protection trip command
•
Opening of the circuit breaker as a result of control operations
•
Closing of the circuit breaker as a result of automatic reclosing or control operations
To link the circuit breaker function block to the control function see 6.2.2.1 Structure of the Circuit-Breaker
Switching Device. Tripping is always the result of a protection function. The operate indications of the indi-
5.5.6.3
5.5.6.4
5.5.7
5.5.7.1
5.5.7.2
Function-Group Types
5.5 Function-Group Type Circuit Breaker, 3-Pole
SIPROTEC 5, High-Voltage Bay Controller, Manual 215
C53000-G5040-C015-9, Edition 11.2017