ZNRG2061 Evaluation Kit User Manual
© 2017 Integrated Device Technology, Inc.
9
March 29, 2017
2.2
Arc Test Circuitry
The Evaluation Board also provides an arc test circuit that can produce a signal to mimic an arcing event. The arc test circuit (see Figure 6)
produces a noise signal that can be controlled manually with a switch.
When the current transformer is connected as shown in Figure 4, the user can press the FAKE-ARC switch, J2, to generate a noise signal via
the transistor Q1 and the IC3 operational amplifier, simulating an arcing event. Pins 1 and 2 on the 3-pin jumper SJ1 must be shorted for the
arc test circuitry to work. The RA+ and RA- must be connected to the secondary of the current transformer per Figure 2.
Potentiometers R3 and R11 (see Figure 7) can be used to adjust the arc test signal. R3 will adjust the op amp gain to obtain the right
amplitude for the test signal. The Evaluation Kit has been pre-tested with the right values for potentiometers R3 and R11.
Refer to the ZNRG2061 Software User Manual for full details for using the arc fault detector test circuit with the GUI.
Figure 6. Arc Test Circuitry Schematic
Figure 7. Potentiometers R3 and R11
R3 Potentiometer
R11 Potentiometer
