If the blocking signal is active when the pick-up element activates, a BLOCKED signal is generated and
the function does not process the situation further. If the START function has been activated before the
blocking signal, it resets and the release time characteristics are processed similarly to when the pick-
up signal is reset.
The blocking of the function causes an HMI display event and a time-stamped blocking event with
information of the startup current values and its fault type to be issued.
The blocking signal can also be tested in the commissioning phase by a software switch signal when
the relay's testing mode "Enable stage forcing" is activated (
General
→
Device).
The variables the user can set are binary signals from the system. The blocking signal needs to reach
the device minimum of 5 ms before the set operating delay has passed in order for the blocking to
activate in time.
Operating time characteristics for activation and reset
This function supports definite time delay (DT). The following table presents the setting parameters for
the function's time characteristics.
Table. 5.5.3 - 183. Settings for operating time characteristics.
Name
Range
Step
Default
Description
Phase THD alarm
delay
0.000…1800.000s 0.005s 10.000s Defines the delay for the alarm timer from the phase
currents' measured THD.
I01 THD alarm
delay
0.000…1800.000s 0.005s 10.000s Defines the delay for the alarm timer from the residual current
I01's measured THD.
I02 THD alarm
delay
0.000…1800.000s 0.005s 10.000s Defines the delay for the alarm timer from the residual current
I02's measured THD.
Events and registers
The total harmonic distortion monitor function (abbreviated "THD" in event block names) generates
events and registers from the status changes in the alarm function when it is activated. The recorded
signals are START and ALARM signals for the monitoring elements as well as common BLOCKED
signals. The user can select which event messages are stored in the main event buffer: ON, OFF, or
both.
The events triggered by the function are recorded with a time stamp and with process data values.
Table. 5.5.3 - 184. Event codes.
Event number
Event channel
Event block name
Event code
Description
3520
55
THD1
0
THD Start Phase ON
3521
55
THD1
1
THD Start Phase OFF
3522
55
THD1
2
THD Start I01 ON
3523
55
THD1
3
THD Start I01 OFF
3524
55
THD1
4
THD Start I02 ON
3525
55
THD1
5
THD Start I02 OFF
3526
55
THD1
6
THD Alarm Phase ON
3527
55
THD1
7
THD Alarm Phase OFF
3528
55
THD1
8
THD Alarm I01 ON
A
AQ
Q-C213
-C213
Instruction manual
Version: 2.04
266
Содержание AQ-C213
Страница 1: ...AQ C213 Capacitor bank protection IED Instruction manual ...
Страница 308: ...Figure 7 4 184 Example block scheme A AQ Q C213 C213 Instruction manual Version 2 04 307 ...
Страница 330: ...Figure 8 14 207 Panel cutout dimensions and device spacing A AQ Q C213 C213 Instruction manual Version 2 04 329 ...