77
EN
Plug layout
LED checklist
Measuring points
Technical Data
The shunt operates according to the compensation principle, where a magnetically soft,
probe functions as a magnetic field detector. The shunt is characterised by the following
features:
- Compact design
- Low offset current
- Low hysteresis
- High temperature stability
- Integrated electronics
The shunt is supplied by a bipolar operating voltage of +/- 15 V and provides an output
signal which is proportional to the measured welding current. The output signal to wel
ding current transfer ratio is 1:2000.
Other functions:
- Electric isolation between high-voltage circuit and electronic circuit
- Null balance and amplification procedures do not apply
- Based on the principle of compensation of magnetic fields, the current transducers
provide a measured current proportional to the primary current
Function over-
view
There are no LED indicators on the shunt.
The welding current can be captured indirectly using a tension gauge. At a welding
current of 100 A for instance, a voltage of 0.33 V must be measured on the UST PC
board, plug X4, pins 5 and 17.
Measuring points Plug/pin Measuring result command value
Welding current X4/5 - X4/17 0.33 V at a welding current of 100 A
NOTE! To prevent malfunction, and to exclude the possibility of damage to
other parts in the power source, use only the adapter cable supplied.
Supply voltage +15 V /- 15 V
Nominal current 500 A
Output current at nominal current 250 mA
Transformation ratio 1 : 2000
Pin function
X1 Molex plug from adapter cable
Pin 1 +15 V
Pin 2 -15 V
Pin 3 I Real -
Pin 4 GND
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