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1MAC050144-MB C
Section 7
Control functions
615 series ANSI
521
Technical Manual
sides of the circuit breaker have the same frequency and are in phase with a magnitude that
makes the concerned busbars or lines can be regarded as live.
In the command control mode operation, an external command signal CL_COMMAND,
besides the normal closing conditions, is needed for delivering the closing signal. In the
command control mode operation, the synchrocheck function itself closes the breaker via
the SYNC_OK output when the conditions are fulfilled. In this case, the control function
block delivers the command signal to close the synchrocheck function for the releasing of
a closing signal pulse to the circuit breaker. If the closing conditions are fulfilled during a
permitted check time set with
Maximum Syn time
, after the command signal is delivered
for closing, the synchrocheck function delivers a closing signal to the circuit breaker.
Figure 284:
A simplified block diagram of the synchrocheck function in the command
mode operation
The closing signal is delivered only once for each activated external closing command
signal. The pulse length of the delivered closing is set with the Close pulse setting.
Figure 285:
Determination of the pulse length of the closing signal
25
52
I
Closing
request
Closing
command
Summary of Contents for 615 Series ANSI
Page 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
Page 2: ......
Page 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Page 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Page 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Page 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Page 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
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