Measuring The Operate Value For The Zero-Sequence Function; Measuring The Operate Value For The Dead Line Detection Function - ABB Relion 670 Series Commissioning Manual

1MRK 511 403-UEN Rev. K
a
IECEQUATION00022 V2 EN-US
7. Compare the result with the set value of the negative-sequence operating current. Consider
that the set value 3I2< is in percentage of the base current IBase.
11.9.2.3

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 3U0> is in percentage of the base voltage.)
5. Repeat steps
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 3I0< is in percentage of the base current IBase.
11.9.2.4

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).
Bay control REC670
Commissioning manual
p ×
2
j
= × = - +
1 e 0, 5 . j
3
×
= U + U + U
0 L1 L2 L3
U , U and U
L1 L2 L3
are the measured phase voltages
1 and 2. Then slowly increase the measured current in one phase until the BLKU
× + +
I = I I I
0 L1 L2 L3
,
I and I
L 1 L 2 L 3
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3
2
are the measured phase currents
Section 11
Testing functionality by secondary injection
(Equation 39)
(Equation 40)
GUID-4ABF1FD4-F6D3-4109-AFE5-552875E558A0 v4
M1405-72 v11
151