Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 430)

Section 7C
Power Distribution and Wiring Guidelines
7C-12
Figure 7C.15
Spike Voltage 100V ac (rms) Arc Inductive Load
(528V)
100V ac
SW
L
100mH
0 Volts
0 Amps
dt = 0.7ms
90 °
I
L
3.71A peak
-3.71 A
di = +3.71A
V
L
141 V peak
11236-I
Radiated Noise
Radiated noise reaches the control through the air. The cables and the
metallic frames, of the control, function as antennas that receive electrical
noise from a variety of sources such as ac power lines, welding arcs,
transformers, motors, and radio wave transmission devices.
If a number of electronic components are arranged near the control, the
surrounding air will be filled with radiated noise. The control must be
shielded to protect it from radiated noise. Radiated noise is composed of
three types of noise:
electrostatic induction noise
magnetic induction noise
electromagnetic induction noise
END OF SECTION