ABB Relion 670 series - Connecting Injection Unit REX060, Coupling Capacitor Unit REX061 and Shunt Resistor Unit REX062

5.5.2 Connecting injection unit REX060, coupling capacitor unit
REX061 and shunt resistor unit REX062
The figures below show typical installations for rotor and stator earth fault
protection, where injection unit REX060, coupling capacitor unit REX061 and with
and without shunt resistor unit REX062.
The injection unit REX060 should be installed close to the IED in the same
cubicle, in any case within 10 m distance of the IED.
The shunt resistor unit, REX062, should preferably also be installed in the same
cubicle, if used in the application.
Cable length between REX060 and generator should preferable not exceed 75 m, in
any case not exceed 150 m. The recommended cable area for distances up to 75 m
is 2.5 mm
2
. The cable area should be increased to 4 mm
2
for distances between 75
m and 150 m.
Cable length between REX062 and generator should preferable not exceed 75 m, in
any case not exceed 150 m. The recommended cable area for distances up to 75 m
is 2.5 mm
2
. The cable area should be increased to 4 mm
2
for distances between 75
m and 150 m.
IEC11000224.ai
IEC11000224 V1 EN
Figure 46: Rotor connection example
1MRK 502 029-UEN A Section 5
Installing the IED
69
Installation and commissioning manual