ABB REV615 - Protection of a Harmonic Filter Circuit in an Industrial Network; Protection of a Single Star Connected Capacitor Bank

3U Uo
R
L
ClearESC
I
O
U12 0. 0 kV
P 0.00 kW
Q 0.00 kVAr
IL2 0 A
A
3I
REV615
Std. conf.
ANSI IEC
27/59/59G
49T
50L/50NL
50P/51P
51C
51NC-2
51P/51N
55TD
3U</3U>/Uo>
3Ith>T
ARC
3I>>>
3I> 3I<
3dI>C
3I>/Io>
TD>
B
Io
3I
unb
GUID-30461537-C53B-460B-BA27-9667D6977F77 V1 EN
Figure 5. Protection of a harmonic filter circuit in an industrial network
Figure 5 illustrates the protection of a harmonic filter circuit in an
industrial network. Standard configuration B is used with
overload, three-phase connected current unbalance and
undercurrent protection for the harmonic filter and with an
additional thermal protection mainly for the coil. Overcurrent
and earth-fault protection functions are used for protecting the
feeder cable and harmonic filter circuit combination.
3U Uo
R
L
ClearESC
I
O
U12 0. 0 kV
P 0.00 kW
Q 0.00 kVAr
IL2 0 A
A
3I
REV615
Std. conf.
ANSI IEC
27/59/59G
50L/50NL
50P/51P
51C
51P
55TD
67N
3U</3U>/Uo>
ARC
3I>>>
3I> 3I<
3I>
TD>
Io>→
B
Uo
b
Io
GUID-9C6F9938-FB13-4615-842A-9606411B47FC V1 EN
Figure 6. Protection of a single star connected capacitor bank
The protection of a single star connected capacitor bank is
shown in Figure 6. Standard configuration B is used with
overload, voltage-based unbalance (Uob) and undercurrent
protection for the capacitor bank. Overcurrent and earth-fault
protection functions are used for protecting the feeder cable
and the capacitor bank combination.
Capacitor Bank Protection and Control
1MRS757952 D
REV615
Product version: 5.0 FP1
ABB 9