Zero Sequence Based - ABB REC670 Applications Manual

1MRK 511 401-UEN A
13.2.3.4
13.2.3.5
Bay control REC670 2.2 IEC
Application manual
I 2
 
3 I 2 100
IBase
EQUATION1520 V5 EN-US
where:
I2 is the maximal negative sequence current during normal operating conditions, plus a margin
of 10...20%
IBase
is the base current for the function according to the setting

Zero sequence based

The IED setting value 3U0> is given in percentage of the base voltage UBase. The
setting of 3U0> should not be set lower than the value that is calculated according
to equation 110.
3 U 0
 
3 U 0 100
UBase 3
EQUATION1521 V4 EN-US
where:
3U0 is the maximal zero sequence voltage during normal operation conditions, plus a margin of
10...20%
UBase is the base voltage for the function according to the setting
The setting of the current limit 3I0< is done in percentage of IBase. The setting of
3I0< must be higher than the normal unbalance current that might exist in the
system. The setting can be calculated according to equation 111.
3 0 I
<
3 0 I 100
= ×
IBase
EQUATION2293 V3 EN-US
where:
3I0< is the maximal zero sequence current during normal operating conditions, plus a margin of
10...20%
IBase
is the base current for the function according to the setting
Delta U and delta I
Set the operation mode selector OpDUDI to On if the delta function shall be in
operation.
Secondary system supervision
GlobalBaseSel
GlobalBaseSel
GlobalBaseSel
GUID-02336F26-98C0-419D-8759-45F5F12580DE v7
Section 13
(Equation 109)
M13683-43 v8
(Equation 110)
(Equation 111)
279