Table. 5.5.2 - 177. Event codes.
Event number
Event channel
Event block name
Event code
Description
3392
53
VTS1
0
Bus VT fail Start ON
3393
53
VTS1
1
Bus VT fail Start OFF
3394
53
VTS1
2
Bus VT fail Trip ON
3395
53
VTS1
3
Bus VT fail Trip OFF
3396
53
VTS1
4
Bus VT fail Block ON
3397
53
VTS1
5
Bus VT fail Block OFF
3398
53
VTS1
6
Line VT fail ON
3399
53
VTS1
7
Line VT fail OFF
3400
53
VTS1
8
Bus Fuse fail ON
3401
53
VTS1
9
Bus Fuse fail OFF
3402
53
VTS1
10
Line Fuse fail ON
3403
53
VTS1
11
Line Fuse fail OFF
The function registers its operation into the last twelve (12) time-stamped registers. The register of the
function records the ON event process data for ACTIVATED, BLOCKED, etc. The table below
presents the structure of the function's register content.
Table. 5.5.2 - 178. Register content.
Date and time
Event
code
Volt 1, 2, 3,
4 status
System status
Input A, B, C, D
angle diff
Trip time
remaining
Used SG
dd.mm.yyyy
hh:mm:ss.mss
3392-3403
Descr.
0: No voltage
1: Voltage
OK
2: Low
voltage
0: Bus dead
1: Bus live, VTS
OK, Seq. OK
2: Bus live, VTS
OK, Seq. reversed
3: Bus live, VTS
OK, Seq. undefined
4: Bus live, VTS fault
0.00...360.00deg
0...1800s
Setting group
1...8 active
5.5.3 Total harmonic distortion (THD)
The total harmonic distortion (THD) function is used for monitoring the content of the current harmonic.
The THD is a measurement of the harmonic distortion present, and it is defined as the ratio between
the sum of all harmonic components' powers and the power of the fundamental frequency (RMS).
Harmonics can be caused by different sources in electric networks such as electric machine drives,
thyristor controls, etc. The function's monitoring of the currents can be used to alarm of the harmonic
content rising too high; this can occur when there is an electric quality requirement in the protected
unit, or when the harmonics generated by the process need to be monitored.
The function constantly measures the phase and residual current magnitudes as well as the harmonic
content of the monitored signals up to the 31
st
harmonic component. When the function is activated,
the measurements are also available for the mimic and the measurement views in the HMI carousel.
The user can also set the alarming limits for each measured channel if the application so requires.
The monitoring of the measured signals can be selected to be based either on an amplitude ratio or on
the above-mentioned power ratio. The difference is in the calculation formula (as shown below):
A
AQ
Q-C213
-C213
Instruction manual
Version: 2.04
262
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 ...