Circutor SVGm, Instruction Manual

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39
Instruction Manual
SVGm
be used in distorted networks, with no need to add filtering elements to the installation.
To adapt to the different needs of each installation, the target
cos Φ
can be defined in different ways:

Mode 1 is the basic mode of operation, in which we define a target cos
Φ
and the device will
try to generate the reactive power needed to achieve that target.

In
Mode 2
of operation, instead of defining a single target, a range of acceptable
cos Φ
is
defined. Any value of cos Φ within that range will be valid. This allows acceptance ranges to be
programmed based on the installation's requirements, and the device will generate the reactive
power to fall within this range. If the installation is already inside this range, the device will take
no action. This mode yields the most efficiency from the SVGm .
It is not always possible to measure all the loads present in the installation. There may be loads that
cannot be measured, or we need to compensate the inductive reactive power of the power transformer,
or the cable length between the measurement point and the billing point may generate reactive power
that affects the target power factor. To solve these problems, a fixed reactive power to be generated
(offset) can be specified. In this case, the device will calculate the reactive power to be generated based
on the target cos Φ and adding the programmed offset value.
4�2�- MEDIUM VOLTAGE
The SVGm is able to compensate for the reactive current in medium voltage with the unit connected
in low voltage. To do this, a current measurement transformer must be used to measure the medium
voltage current.
There is a phase difference between the primary and secondary current of the medium voltage power
transformer, which depends on the construction of the transformer. To compensate for this difference,
the type of transformer used and its transformation ratio has to be entered in the settings screen (
“7.7
- MEDIUM VOLTAGE”
). This information is available on the transformer’s rating plate.
Medium Voltage Low Voltage
Figure 33: Operation of the SVGm in Medium Voltage�