Coupling Capacitor Unit Rex061 - ABB Relion Series Product Manual

670/650 series and SAM600-IO IEC
Local operation shall only be performed
according to the operation regulations set
up by the relevant operation authority of the
plant.
Mounting the injection unit REX060
The injection unit REX060 case size is 6U, 1/2 x 19".
REX060 can be rack, wall or flush mounted in the same way
as the IED. For guidance, see instructions for rack
mounting, wall mounting or flush mounting the IED in this
manual.
REX060 shall be mounted close to the IED. It is
recommended that they are mounted in the same cubicle.
REX060 Front panel
IEC11000053 V1 EN-US
Figure 24. REX060 front panel
Hitachi Power Grids
GUID-264732AC-6C84-44E6-9F86-2065AD0B7D5B v3
GUID-35437B83-47A9-4E2C-8D22-CCADC51BCC96 v1
IEC11000053-1-en.vsd
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Rotor injection module RIM
The RIM module is installed into the REX060 enclosure.
The RIM module generates a square wave voltage signal for
injection into the rotor circuit via a capacitor unit REX061 for
isolation. The RIM module measures the voltage and
current from the injected signal and the IED consecutively
calculates the rotor to earth impedance. If the calculated
impedance is lower than the preset value an ALARM and/or
TRIP output is set.
Stator injection module SIM
The SIM module is installed into the REX060 enclosure.
The SIM module generates a square wave voltage signal for
injection into the stator circuit via the neutral point VT/NGT.
The SIM module measures the voltage and current from the
injected signal and the IED consecutively calculates the
stator to earth impedance. If the calculated impedance is
lower than the preset value an ALARM and/or TRIP output
is set.

13. Coupling capacitor unit REX061

Coupling capacitor unit REX061
REX061 isolates the injection circuit from the rotor exciter
voltage.
The REX061 coupling capacitor unit grounding point and
grounding brush of the rotor shaft should be properly
interconnected.
1MRK 514 012-BEN K
GUID-B2CA6C9E-2A24-483C-B9C2-47FFF2BBB283 v2
GUID-CF2B2004-97E9-4593-95CB-2E86A01EA779 v2
GUID-39A03C0F-44DC-47DD-9D7E-66C8292CD3A8 v1
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