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CS-I User and Maintenance, R.2.8 ENG
Safco Systems Ltd-Via Isonzo 17/b-20090 Cesano Boscone-Milan-Italy
tel. +39 024504433 Fax +39 024504321 E-mail:[email protected] Web site: www.safcosys.it
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Transducer type 1/2/3/4
Range
value:
NO-Rog-CT
If you intend to perform the current reading on the secondary of the transformer (typically)
one must set the parameter of the transducer "Type Transducer" on Rog. (Rogowski loop),
you must correctly set the parameter of the K factor used Rogowski, typical 150mV/KA
If you intend to do instead of reading on the current transformer primary, you must set the
parameter of the transducer on CT (current transformer), it is also necessary to set the
proper parameters of the transformer turns ratio, in the calibration menu, combined with
electrode pair / processor in use during the execution of the program given by the ratio of
primary voltage, typically 500V and the output voltage of the transformer.
If you do not want to use in the manner and D ‰ V ‰, the secondary current transducer,
you must set the parameter of the transducer "Type Transducer" No to prevent the
connection test, which is automatically performed on the transducer.
Please note that in Seam mode, for long Cycles of welding,> 30'', and continuous (no
breaks pulsation cycles of at least 2-3 times), the ring Rogowski is not suitable for the
reading of the current due to secondary the natural drift of the integrated circuit, so it is
obligatory to use the CT primary current transducer located inside the inverter
K Rog 1/2/3/4
Range value:
from 10 to 250
Set mV rendered by Rogowski transducer for KA of current variation (or flow derivative) for
the correct display of the current.
To use the CS-I in the closed loop mode IK etc. you must perform the calibration procedure
of the plan, (transformer, pliers, etc), for the determination of the parameters "Alpha, Beta,
Gamma", or alternately key in, these parameters manually, if known.
You must also set the maximum current of the transformer used in accordance with the
power of the CS-I, these data for each pair of electrodes / transformer.
The parameter "
Transf. Ratio
" represents the turns ratio of the transformer used,
although this parameter should be entered for each pair of electrodes / transformer, and it is
essential to key in it when you want to make an adjustment of current-type primary
In the case of an excessive presence of OVERSHUT or UNDERSHUT for the type of work
performed, the parameter GAIN_I will be useful to compensate the speed of control loop PI.
K_Filt 1/2/3/4
Range
value:
1-2-4
Sets the filtering of the Rogowski Coil, and Current Transformer, it is necessary to increase
this value when the signal from Rogowski coli / CT is noisy as in the case of a coil placed
inside the welding transformer or when it is placed in particularly noisy position, reducing
the value to a minimum you get a greater speed of acquisition of the current value
decreases by increasing the speed, this also impacts on the speed of adjustment of the
current itself, the optimal value is equal to 2 by default.