Closing is permitted during
Maximum Syn time
, starting from the moment the external
command signal
CL_COMMAND
is activated. The
CL_COMMAND
input must be kept
active for the whole time that the closing conditions are waited to be fulfilled. Otherwise,
the procedure is cancelled. If the closing-command conditions are fulfilled during
Maximum Syn time
, a closing pulse is delivered to the circuit breaker. If the closing
conditions are not fulfilled during the checking time, the alarm
CL_FAIL_AL
is activated
as an indication of a failed closing attempt. The closing pulse is not delivered if the closing
conditions become valid after
Maximum Syn time
has elapsed. The closing pulse is
delivered only once for each activated external command signal, and a new closing-
command sequence cannot be started until the external command signal is reset and
reactivated. The
SYNC_INPRO
output is active when the closing-command sequence is
in progress and it is reset when the
CL_COMMAND
input is reset or
Maximum Syn time
has
elapsed.
Bypass mode
25 can be set to the bypass mode by setting the parameters
Synchrocheck mode
and
Live
dead mode
to "Disable" or alternatively by activating the
BYPASS
input.
In the bypass mode, the closing conditions are always considered to be fulfilled by 25.
Otherwise, the operation is similar to the normal mode.
Voltage angle difference adjustment
In application where the power transformer is located between the voltage measurement
and the vector group connection gives phase difference to the voltages between the high-
and low-voltage sides, the angle adjustment can be used to meet synchronism.
Section 9
1MAC059074-MB A
Control functions
984
615 series ANSI
Technical Manual
Summary of Contents for Relion 615 series
Page 1: ... RELION PROTECTION AND CONTROL 615 series ANSI Technical Manual ...
Page 2: ......
Page 39: ...Section 17 Glossary 1181 Table of contents 615 series ANSI 33 Technical Manual ...
Page 40: ...34 ...
Page 64: ...58 ...
Page 216: ...210 ...
Page 884: ...878 ...
Page 1038: ...1032 ...
Page 1136: ...1130 ...
Page 1172: ...1166 ...
Page 1180: ...1174 ...
Page 1186: ...1180 ...
Page 1192: ...1186 ...
Page 1193: ...1187 ...
Page 1194: ......
Page 1195: ......