Users Guide
83
I NEED MORE CURRENT, VOLTAGE or POWER
One of the most frequent questions is the current limit that users can obtain from the
system over a certain burden. This is especially frequent when the user wishes to exceed
the nominal current of the test equipment or he is trying to use long cables to carry high
current.
As you know, to obtain high current, the maximum output voltage possible from the
injector equipment is required as well as the minimum load impedance possible.
Maximum output voltage of the system
The power supply
One of the most common errors is not to pay the necessary attention to the power supply
of the system.
Bear in mind the maximum admissible consumption for each unit:
Raptor-MS: 19 A in permanent, 38 A for 3 minutes and 74 A for 3 seconds.
Raptor-SL: 26 A in permanent, 52 A for 3 minutes and 104 A for 3 seconds.
The feed cables supplied with each unit are adequately dimensioned for these
consumptions. The part that you have to pay attention to is the cable that takes the power
supply to the system. You must add up all the consumptions foreseen for each unit and
dimension it so that 4.5 A/mm
2
are not exceeded in permanent regime. Although with
this current density calculated for the permanent, it is correct to use the system in 3 min.
and 3 s. regimes, if you wish to optimise the output voltage in the other regimes (3 min, 3
s) set the cable to the same density.
Recommended cross-sections for each conductor (in mm
2)
for the feed cable of the entire
system:
System Permanent 3 minutes 3 seconds
C-05 4 10 16
C-15 10 16 35
C-25 16 35 50
C-35 25 50 70
You must bear in mind that the Raptor gives its maximum power with a 240 Vac supply,
measured at the start of the feed cable supplied. Insofar as this voltage is less or if it
drops during the test, the maximum current or maximum voltage will also drop.
If you supply the system with a Generator and this has regulation, try to set it a little
higher (for example at 250) to try to compensate the drop that will occur at the time of
injection. Take care not to exceed the equipment specification at any time (230 + 10%).
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