33
Making the electrical connection
Chapter 5
Installing the IED
Figure 16:
Board with male connectors
Figure 17:
Connected cables with ferrules.
4.4
Connecting to protective earth
Connect the earthing screws on the rear of the IED unit to the closest possible earthing point in
the cubicle. Electrical codes and standards require that protective earth cables are green/yellow
conductors with a cross section area of at least 2.5 mm
2
(AWG14). There are several protective
earthing screws on an IED. The Power supply unit, Transformer modules and the enclosure are
all separately earthed, see
figure 18
Where:
1
is ferrule
1
xx01000050.vsd
Summary of Contents for RELION REL670
Page 8: ...Contents ...
Page 72: ...64 About this chapter Chapter 9 Establishing connection and verifying the LON communication ...
Page 174: ...166 Remote communication Chapter 11 Verifying settings by secondary injection ...
Page 190: ...182 Maintenance Chapter 13 Fault tracing and repair ...
Page 198: ...190 Glossary Chapter 14 Glossary ...