Event number
Event channel
Event block name
Event code
Description
5895
92
UV4
7
Undervoltage Block OFF
The function registers its operation into the last twelve (12) time-stamped registers; this information is
available for all provided instances separately. The register of the function records the ON event
process data for START, TRIP or BLOCKED. The table below presents the structure of the function's
register content.
Table. 5.3.9 - 102. Register content.
Date and time
Event code
Fault
type
Pre-trig
voltage
Fault
voltage
Pre-fault
voltage
Trip time
remaining
Used SG
dd.mm.yyyy
hh:mm:ss.mss
5696-5895 Descr.
A…A-
B-C
Start
average
voltage
Trip -20ms
averages
Start -200ms
averages
0 ms...1800s
Setting
group 1...8
active
5.3.10 Neutral overvoltage protection (U0>; 59N)
The neutral overvoltage function is used for non-directional instant and time-delayed earth fault
protection. Each device with a voltage protection module has four (4) available stages of the
function (U0>, U0>>, U0>>>, U0>>>>). The function constantly measures phase-to-earth voltage
magnitudes and calculates the zero sequence component. Neutral overvoltage protection is scaled
to line-to-line RMS level. When the line-to-line voltage of a system is 100 V in the secondary side, the
earth fault is 100 % of the
U
n
and the calculated zero sequence voltage reaches 100/
√
3 V = 57.74 V.
Below is the formula for symmetric component calculation (and therefore to zero sequence voltage
calculation).
Below are some examples of zero sequence calculation.
Figure. 5.3.10 - 110. Normal situation.
A
AQ
Q-C213
-C213
Instruction manual
Version: 2.04
155
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 ...