Siemens siprotec 7SD5 User Manual page 439

Table 2-24
The plus sign indicated in the indication is a confirmation of the command execution:
The command output has a positive result, as expected. A minus sign means a neg-
ative, i.e. an unexpected result; the command was rejected. Figure 2-188 shows an
example in the operational indications command and feedback of a positively run
switching action of the circuit breaker.
The check of interlocking can be programmed separately for all switching devices and
tags that were set with a tagging command. Other internal commands such as over-
riding or abort are not tested, i.e. are executed independently of the interlockings.
Figure 2-188
Standard Interlock- The standard interlocking includes the checks for each switchgear which were set
ing during the configuration of inputs and outputs, see SIPROTEC
An overview for processing the interlocking conditions in the relay is shown in Figure
2-189.
7SD5 Manual
C53000-G1176-C169-1
Command types and corresponding indications
Type of Command
Control issued
Manual tagging (positive / nega-
tive)
Information state command, Input
blocking
Information state command,
Output blocking
Cancel command
Example of an operational indication for switching circuit breaker 52
Control
Switching
Manual tagging
Input blocking
Output blocking
Cancel
2.25 Command Processing
Cause Indication
CO CO+/–
MT MT+/–
ST ST+/– *)
ST ST+/– *)
CA CA+/–
®
4 System Description.
439