ABB REG670 Commissioning Manual page 163

1MRK 502 073-UUS A
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual
1. Feed the IED with current and voltage corresponding to a normal operation point
Injected voltage V equal to base voltage (VBase) and the injected current I equal
to half the base current (IBase). The angle between the voltage and current shall
be 0°.
2. With maintained amplitude of the injected voltage the current amplitude and
angle is changed to a value ZC/2.
This is done with a speed so that the final impedance is reached after 1 second.
As the injected voltage is higher than 0.92 VBase no PICKUP signal should be
activated.
3. With reduced amplitude of the injected voltage to 0.8 VBase the current
amplitude and angle is changed to a value ZC/2.
This is done with a speed so that the final impedance is reached after 1 second.
As the injected voltage is lower than 0.92 VBase the PICKUP signal should be
activated.
4. With reduced amplitude of the injected voltage to 0.8 VBase the current
amplitude and angle is changed via ZC/2 to a value corresponding to half IBase
and 180° between the injected current and voltage.
This is done with a speed so that the final impedance is reached after 1 second.
As the injected voltage is lower than 0.92 VBase the PICKUP signal should be
activated. In addition to this the signal ZONE1 should be activated.
5. Set N1Limit to 1 and repeat step 4.
Now the signals TRIP1 and TRIP should be activated.
6. With reduced amplitude of the injected voltage to 0.8 VBase the current
amplitude and angle is changed via ZC + (ZA – ZC)/2 to a value corresponding to
half IBase and 180° between the injected current and voltage.
This is done with a speed so that the final impedance is reached after 1s. As the
injected voltage is lower than 0.92 VBase the PICKUP signal should be activated.
In addition to this the signal ZONE2 should be activated.
7. Set N2Limit to 1 and repeat step 6.
Now the signals TRIP2 and TRIP should be activated.
Testing functionality by secondary injection
Section 13
157