AMETEK CTS Quick start guide - Conducted
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8. Quick start guide coupling NX - CDN 30x3A
8.1. Grounding and power connection
Two independent ground connections are necessary- one for the test system and one for the EUT. These must be connected
back to the local permanent installation or to a fixed, permanent ground conductor. To avoid electric shock, the power cord
protective grounding conductor must be connected to ground.
Figure 31 - Grouding requirements
System GND
The system is connected to GND via the earth wire of the connected mains power cable for the coupling, generator and the
EUT supply. A separate GND wire from the reference GND plane to the building earth point may be useful to avoid
interferences to other areas.
EUT GND
Ensure that a reliable return path for the interference current is provided between the EUT and the generator. The GND wire
from the generator to the reference GND and must be designed as a low inductance connection suitable for high frequencies.
The reference ground plane and the ground connections to the instruments, as described in the relevant test standards, serve
this purpose well.
Protection (optional)
A proposal is to separate protection of the EMC system with filters, insulation transformer or fault current protection and other
measures may be useful for the EMC installation. The advantage is the separation of the EMC system from all other
installation. A shielded room with adequate filters may be the best solution for avoid unwanted conducted and radiated
interference to other areas.
Connection to reference ground
Figure 32 - Earth bolt dimension
Earth bolt dimensions:
Screws: Metric M4 x 10 mm
Distance: 10.1 mm x 11 mm
Plug: Banana plug, ∅ 4 mm
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