![background image](http://html.mh-extra.com/html/abb/rec650-ansi/rec650-ansi_technical-manual_2772130.webp)
This sub-function has the possibility of choice between definite time delay and inverse
time delay.
The inverse time delay is defined as:
t
TDSN
I
V
reference
I
V
measured
inv
=
⋅
⋅
⋅
⋅
⋅
(
cos (
))
cos (
)
3
3
3
3
0
0
0
0
ϕ
ϕ
EQUATION2032-ANSI V2 EN
(Equation 15)
6.5.7.4
Directional residual current protection measuring 3I
0
and φ
The function will operate if the residual current is larger that the set value and the angle φ
= ang(3I
0
)-ang(V
ref
= -3V
0
) is within the sector
RCADir
±
ROADir
V
ref
=-3V
0
Operate area
3I
0
RCA
= 0º
ROA
= 80º
ANSI06000652-2-en.vsd
ANSI06000652 V2 EN
Figure 48:
Example of characteristic
For trip, the residual current 3I
0
shall be larger than the set level
INDirPU
, the release
voltage 3V
0
shall be larger than the set level
VNRelPU
and the angle φ shall be in the set
sector
ROADir
and
RCADir
.
When the function is activated binary output signals PICKUP and PUDIRIN are activated.
If the output signals are active after the set delay
tDef
the binary output signals TRIP and
TRDIRIN are activated.
Section 6
1MRK 511 287-UUS A
Current protection
124
Technical manual
Содержание REC650 ANSI
Страница 1: ...Relion 650 series Bay control REC650 ANSI Technical manual ...
Страница 2: ......
Страница 42: ...36 ...
Страница 60: ...54 ...
Страница 66: ...60 ...
Страница 424: ...418 ...
Страница 566: ...560 ...
Страница 636: ...630 ...
Страница 699: ...693 ...