Instruction manual –AQ F210 Feeder Protection IED
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If blocking signal is active when pick-up element activates a BLOCKED signal will be
generated and the function shall not process the situation further. If START function has
been activated before blocking signal it will reset and the release time characteristics are
processed as in case of when pick-up signal is reset.
From blocking of the function a HMI display event as well as time stamped blocking event
with information of the startup current values and fault type is issued.
Blocking signal can be tested also in the commissioning phase of the stage by software
switch signal when relay common and global testing mode is activated.
User settable variables are binary signals from the system. Blocking signal needs to reach
the IED minimum of 5 ms before the set operating delay has passed for blocking to be active
in time.
4.2.6.4
O
PERATING TIME CHARACTERISTICS FOR ACTIVATION AND RESET
The operating timers’ behavior of the function is set depending of the application. Both of
the timers are started from the same pick-up signal, which means that in case Retrip is used
the time grading should be set so that the Retrip time added with expected operating time
and releasing time of the CBFP pick up conditions is shorter than the set CBFP time in order
to avoid unnecessary CBFP in cases when re tripping to another breaker coil clears the
fault. In the following table are presented the setting parameters for the function time
characteristics.
Table 4.2.6.4-52 Operating time characteristics setting parameters.
Name
Range
Step
Default
Description
Retrip
No
Yes
-
Yes
Retrip enabled or disabled. If Retrip is disabled the
output will not be visible and also the TRetr setting
parameter will not be available.
Retrip
time
delay
0.000…1800.000s 0.005s 0.100s
Retrip start timer, this setting defines how long the
starting condition has to last before RETRIP signal is
activated.
CBFP
0.000…1800.000s 0.005s 0.200s
CBFP start timer, this setting defines how long the
starting condition has to last before CBFP signal is
activated.
In following figures are presented few typical cases of CBFP situations.
Содержание AQ-F210
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