Settings For Sensitive Rotor Earth Fault Protection,Rotiphiz - ABB REG670 Applications Manual

1MRK 502 071-UEN -
8.7.3.3
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Application manual
IED
VOLTAGE MEASURE (U)
CURRENT MEASURE (U)
IEC11000210 V1 EN
Figure 157: Connection to IED with two analogue voltage inputs
Some settings are required for the analog voltage inputs. Set the voltage ratio for the
inputs to 1/1, for example, VTSecx = 100 V VTPrimx = 0.1 kV
The analog inputs are linked to a pre-processor block in the Signal Matrix Tool. This
pre-processor block must have the same cycle time, 8 ms, as the function blocks for
STTIPHIZ and ROTIPHIZ.
The default parameter settings are used for the pre-processor block.
It is possible to connect two REG670 IEDs in parallel to the REX060 injection unit in
order to obtain redundant measurement in the two IEDs. However, at commissioning,
both IEDs must be connected during the calibration procedure.
It is important that REX060, REX061 and REX062 chassis are solidly
earthed. Protective earth is a separate 4 mm screw terminal that is a
part of the metallic chassis.

Settings for sensitive rotor earth fault protection,ROTIPHIZ

Operation to be set On to activate the sensitive rotor earth-fault protection
RTrip is the resistance level,set directly in primary Ohms, for activation of the trip-
function.
RAlarm is the resistance level, set directly in primary Ohms, for activation of the
alarm-function.
Section 8
Impedance protection
X61
8
9
STATOR MODULE SIM
10
11
X81
8
9
ROTOR MODULE RIM
10
11
IEC11000210-1-en.vsd
REX060
297