Ground Connection On The Device - NR Electric PCS-9611 Instruction Manual

surface-to-surface to the grounded frame to ensure a low-impedance path to ground for RF
interference. The contact surfaces must not only conduct well, they must also be non -corroding.
NOTE! If the above conditions are not fulfilled, there is a possibility of the cubicle or parts
of it forming a resonant circuit at certain frequencies that would amplify the transmission
of interference by the devices installed and also reduce their immunity to i nduced
interference.
Movable parts of the cubicle such as doors (front and back) or hinged equipment frames must be
effectively grounded to the frame by three braided copper strips (see Figure 11.7-1).
The metal parts of the cubicle housing and the ground rail are interconnected electrically
conducting and corrosion proof. The contact surfaces shall be as large as possible.
NOTE! For metallic connections please observe the voltage difference of both materials
according to the electrochemical code.
The cubicle ground rail must be effectively connected to the station ground rail by a grounding strip
(braided copper).

11.7.3 Ground Connection on the Device

There is a ground terminal on the rear panel (see Figure 11.7-2), and the ground braided copper
strip can be connected with it. Take care that the grounding strip is always as short as possible .
The main thing is that the device is only grounded at one point. Grounding loops from unit to unit
are not allowed.
There are some ground terminals on some connectors of this relay, and the sign is "GND". All the
ground terminals are connected in the cabinet of this relay. So, the ground terminal on the rear
panel (see Figure 11.7-2) is the only ground terminal of this device.
PCS-9611 Feeder Relay
Door or hinged
equipment frame
Figure 11.7-1 Cubicle grounding system
Date: 2014-04-08
Cubicle ground
rail close to floor
Braided
copper strip
Station
ground
Conducting
connection
11 Installation
11-5