ABB REQ650 Commissioning Manual

1. Simulate normal operating conditions with the three-phase currents in phase with
their corresponding phase voltages and with all of them equal to their rated values.
2. Slowly decrease the measured voltage in one phase until the BLKV signal appears.
3. Record the measured voltage and calculate the corresponding zero-sequence voltage
according to the equation.
Observe that the voltages in the equation are phasors.
0
3
A B C
V V V V× = + +
EQUATION1819-ANSI V1 EN (Equation 28)
Where:
A B C
andV V V
EQUATION1820-ANSI V1 EN
= the measured phase voltages
4. Compare the result with the set value (consider that the set value 3V0Pickup is in
percentage of the base voltage of the zero-sequence operating voltage.
5. Repeat steps
1 and 2. Then slowly increase the measured current in one phase until
the BLKV signal disappears.
6. Record the measured current and calculate the corresponding zero-sequence current
according to the equation.
Observe that the currents in the equation are phasors.
0 A B C
3 =I I I I× + +
ANSIEQUATION00019 V1 EN (Equation 30)
Where:
A B C
I I and I ,
ANSIEQUATION00020 V1 EN
= the measured phase currents
7. Compare the result with the set value of the zero-sequence operating current.
Consider that the set value 3I0< is in percentage of the base current IBase.
6.6.2.4 Checking the operation of the dv/dt and di/dt based function
1. Simulate normal operating conditions with the three-phase currents in phase with
their corresponding phase voltages and with all of them equal to their rated values.
2. Change the voltages and currents in all three phases simultaneously.
The voltage change must be greater than the set value for DVPU and the current
change must be less than the set value for DIPU.
1MRK 505 293-UUS A Section 6
Testing functionality
89
Commissioning manual

ABB REQ650 Specifications

General

Brand	ABB
Model	REQ650
Category	Protection Device
Language	English