Measuring The Operate Value For The Zero-Sequence Function; Measuring The Operate Value For The Dead Line Detection Function; Checking The Operation Of The Du/Dt And Di/Dt Based Function - ABB Relion 670 Series Commissioning Manual

1MRK 511 403-UEN E
11.8.2.3

Measuring the operate value for the zero-sequence function

Measure the operate value for the zero-sequence function, if included in the IED.
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 BLKU 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):
3 U
IEC00000276 V1 EN-US
Where:
IEC00000275 V1 EN-US
4. Compare the result with the set value of the zero-sequence operating voltage (consider
that the set value
5. Repeat steps
BLKU 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):
3
IECEQUATION00019 V1 EN-US
Where:
I
IECEQUATION00020 V1 EN-US
7. Compare the result with the set value of the zero-sequence operate current. Consider
that the set value
11.8.2.4

Measuring the operate value for the dead line detection function

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 UDLD< (UDLD< is in percentage of the base voltage
UBase ).
4. Apply three-phase currents with their rated value and zero voltages.
5. Decrease the measured current in one phase until the DLD1PH signal appears.
6. This is the point at which the dead line condition is detected. Check the value of the
decreased current with the set value IDLD< (IDLD< is in percentage of the base current
IBase ).
11.8.2.5

Checking the operation of the du/dt and di/dt based function

Check the operation of the du/dt and di/dt based function if included in the IED.
Bay control REC670
Commissioning manual
×
= U + U + U
0 L1 L2 L3
U , U and U
L1 L2 L3
are the measured phase voltages
3U0> is in percentage of the base voltage.)
1 and 2. Then slowly increase the measured current in one phase until the
× + +
I = I I I
0 L1 L2 L3
,
I and I
L 1 L 2 L 3
3I0< is in percentage of the base current IBase .
© Copyright 2017 ABB. All rights reserved
Testing functionality by secondary injection
are the measured phase currents
GUID-4ABF1FD4-F6D3-4109-AFE5-552875E558A0 v4
Section 11
M1405-72 v11
(Equation 29)
(Equation 30)
M1405-96 v12
137