Overvoltages
are generated on the network, by electric discharges due to
the lightning or due to important current switches. This produces,
between supply poles and the earth of equipments more delicate,
differences of potentials well upper to the ones which can be
beared by components which constitute them.
To
avoid such degradations, we can work on systems in the way to
upgrade their resistance face to currents of several kiloamperes
and voltages of several thousands of Volts. This would involve
an unbearable over-coast and solutions don't always exist.
A
very simple solution consists in lowering this type of perturbations
in the way to make them bearable by the system, it's the SUPTRANS'
list : SUPpression of TRANSient.
OPERATION
: The SUPTRANS presents two operating features. A normal
operation under a mains voltage given, and an operation during
overvoltages perturbations associated to an important energy.
OVERVOLTAGES CASE : The SUPTRANS
is constituted of three separate parts having particular functions
: - a stage of varistors which dissipates the greatest part
of energy by flowing it out into the earth. - a transformer
stage with screen which reduces the difference of transitory
potential applied to the input. - a capacitive stage which absorbs
the residual energy. At the time of shock due to a current discharge,
the associated overvoltage is highly lowered by the SUPTRANS
and the associated current is flowed out into the earth. The
output voltage is subject to a variation which stays bearable
for most utilizations. The overvoltages ended, the poles voltage
recovers its initial value and the SUPTRANS is ready to submit
a new shock.
NORMAL START OPERATION : In
normal start operation the SUPTRANS only produces a low decrease
of the voltage with regard to the mains. The SUPTRANS is set
in series with installations to protect, with a cos(phi) in
the order of 0.95 it doesn't introduce any voltage current disphasing.
It deforms neither current signals nor voltage ones. For more
information please contact us.
PROTECTION OF THE INSTALLATIONS
AGAINST OVERVOLTAGES : An electric installation, made with
several elements, must have a protection on each element to
be well protected.
CHOICE OF YOUR SUPTRANS : The
SUPTRANS power choice depends on installations power to protect
and of these installations type. For example, a system which
consummates 4000VA will need for its protection a SUPTRANS with
a power at least equal to 4000VA. It's the reason why, on every
order, it is advisable to notify the utilization type to protect
and the power consummated. It is moreover judicious to take
future extensions of equipments into account in the way to be
able to include them in the diagram of protection. In case of
difficulties to choose the calibre we will be pleased to help
you. It is necessary to determinate the elements of the system,
liable to generate perturbations, in the way to be able to isolate
them with a simple protection or regroup utilizations under
the same protection. For protections on particular systems,
different mains voltages, frequency other than the 50 Hz, powers
more important, our research department will attend to study
particular problems in the way to suggest as far as we can,
adapted solutions.
PROTECTION : Provided with a
magneto-thermal circuit-breaker input and a differential magneto-thermal
circuit-breaker in output *, the SUPTRANS becomes an important
safety element in every installation. The cutting is automatic
in case of short-circuit or in case of wastage current between
secondary supply conductors and supply earth. The switching
on and out of the equipment is simple, interrupters are easily
accessible.* For system of power ? 1kVA.
CONNECTION : To connect the
SUPTRANS to the mains network, it's necessary to respect the
connecting diagram delivered with the engine and to respect
particularly safety instructions which are listed on the notice.
Concerning ground connections, it is imperative to connect them
to a single ground connection at which is jointed the ground
connection of the SUPTRANS (see connecting diagram). The distance
between SUPTRANS and protected utilization must be as short
as possible in the way to have connections of lower impedance.
UTILIZATION PRECAUTIONS : At
the time of its operation, the SUPTRANS transformer is subject
to an increase of temperature which needs an air circulation
in the box in the way to stabilize the unity temperature. Some
ears of ventilation are provided for this effect on faces of
the chest. The equipment mustn't be occluded or left in a confined
environment, this would involve risks of heating.
|
|
SINGLE-PHASED SUPTRANS 230V 50Hz
|
THREE-PHASED SUPTRANS 230V 50Hz
|
|
Nominal Power
|
0,1 & 0,2
|
0,5
|
1,2 & 3
|
4 & 5
|
6 & 8
|
6, 10 & 15
|
20, 25, 30...
|
100
|
|
Height
|
300
|
430
|
450
|
570
|
820
|
1400
|
1700
|
1910
|
|
Width
|
200
|
300
|
550
|
600
|
600
|
600
|
650
|
902
|
|
Depth
|
160
|
200
|
300
|
350
|
350
|
400
|
650
|
702
|
Beyond 40kVA, the frames are adjusted
in accordance with the transformer in order to have the minimal
space required. - Dimensions can be easily adapted in accordance
with your requirements. - The delays are maximum 4 weeks. -
For any particular order : dimensions, calibre, delays, input
voltage, space requirements… contact us. The SUPTRANS is the
security interface you need to insure a long life of your systems.
The continuity of service can be insured until 40000A 8/20µs
thanks to the redundancy of certain elements (option).
