Siemens 6MD85, Manual

Page: 246 / 1256

No. Information Data Class
(Type) Type
_:315 Circuit break.:Break. voltage phs B MV O
_:316 Circuit break.:Break. voltage phs C MV O
_:322 Circuit break.:CB open hours INS O
_:323 Circuit break.:Operating hours INS O
Circuit-Breaker Position Recognition for Protection-Related Auxiliary
Functions
Overview
This function block calculates the position of the circuit breaker from the evaluation of the auxiliary contacts
and the current flow. The determination is performed phase-segregated.
This information is needed in the following protection-related additional functions:
•
Trip logic (see 5.6.4.1 Function Description )
•
Detection of manual closing (see 5.6.7.1 Function Description )
•
Process monitor (see 5.8.1 Overview of Functions )
Its use is described in the respective chapters.
The control does not use this information. It evaluates the circuit-breaker auxiliary contacts.
[lozust1p-170611-01.tif, 1, en_US]
Figure 5-49 Overview of the Circuit-Breaker Position Recognition Function
Based on the connection between the information from the auxiliary contacts and the current flow, the
circuit-breaker condition can assume the following conditions separately for each phase:
Circuit-Breaker Condition,
Phase-Segregated Description
Open The circuit-breaker pole is detected unambiguously as open
according to both criteria.
Closed The circuit-breaker pole is detected unambiguously as closed
according to both criteria.
Possibly open, possibly closed These conditions can occur if the information is incomplete due to
the routing of the auxiliary contacts and the condition can no longer
be determined reliably. These uncertain conditions are evaluated
differently by certain functions.
5.6.6
5.6.6.1
Function-Group Types
5.6 Function-Group Type Circuit Breaker, 1-/3-Pole
246 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017