ABB REG670 - Measuring the Trip Value for the Dead Line Detection 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. 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-US (Equation 109)
Where:
A B C
andV V V
EQUATION1820-ANSI V1 EN-US
are the measured phase voltages
4. Compare the result with the set value of the zero-sequence tripping voltage
(consider that the set value 3V0Pickup is in percentage of the base 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-US
(Equation 110)
Where:
A B C
I I and I ,
ANSIEQUATION00020 V1 EN-US
are the measured phase currents
7. Compare the result with the set value of the zero-sequence trip current. Consider
that the set value 3I0< is in percentage of the base current IBase.
13.9.2.4 Measuring the
trip value for the dead line detection function
GUID-4ABF1FD4-F6D3-4109-AFE5-552875E558A0 v4
1. Apply three-phase voltages with their rated value and zero currents.
2. Decrease the measured voltage in one phase until the DLD1PH signal appears.
3. This is the point at which the dead line condition is detected. Check the value of
the decreased voltage with the set value VDLDPU (VDLDPU is in percentage of
the base voltage VBase).
Section 13 1MRK 502 073-UUS A
Testing functionality by secondary injection
244 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual