Current Transformer (Ct) Installation On The Grid Side (Closed Loop) - janitza SVG Series User Manual

SVG 50/100
Kompensation

5.5.3 Current transformer (CT) installation on the grid side (closed loop)

If it is not possible to install the CT group on the load side, or if current transformers are
already present on the grid side, the CT groups can also be connected on the grid side (see
Kirchhoff's law of current distribution).
When there is more than one Static Var Generator module, current transformers must
be installed in the supply line to the SVG: this is the only way for the load current to be
captured. This is not necessary only if there is only one Static Var Generator.
CT
1S 1S
1 2
Grid side
CT
1S 1S
1 2
• When there is an existing compensation on the grid side, there are two options for the
installation of the current transformer group: Figure 3-23 (a) and 3-23 (b).
• When there is an existing compensation on the load side, the installation
of the CT groups must done as shown in Figure 3-24.
CT
1S 1S
1 2
Grid side
Kompensation
CT
1S 1S
1 2
36
1S 1S 2S
1 2 1 2S
2
P P
1 2
NOTE
SVG
SVG
1S 1S
2S 2S
1 2
1 2
P P
1 2
SVG
Figure 3-22
Current transformer on the grid side
SVG
AHF
1S 1S 2S
1 2 1 2S
2
P
P
2
1
SVG
Figure 3-23 (a)
Current transformer on the grid side
with compensation on the grid side
SVG
Load side
Load side