ABB REG670 Commissioning Manual page 152

Section 13
Testing functionality by secondary injection
146
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 UBase no START signal
should be activated.
3. With reduced amplitude of the injected voltage to 0.8 UBase 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 UBase the START signal
should be activated.
4. With reduced amplitude of the injected voltage to 0.8 UBase 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 UBase the START 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 UBase 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 UBase the START 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.
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
1MRK 502 073-UEN A
Commissioning manual