Measuring The Operate Value For The Negative Sequence Function; Measuring The Operate Value For The Zero-Sequence Function - ABB Relion 650 Series Commissioning Manual
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Also See for Relion 650 Series:
- Technical manual (754 pages) ,
- Applications manual (382 pages) ,
- Commissioning manual (182 pages)
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Section 7
Testing functionality
7.7.1.2
Measuring the operate value for the negative sequence 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 negative-sequence voltage
according to the equation.
Observe that the voltages in the equation are phasors.
×
3
EQUATION1818-ANSI V1 EN-US
Where:
V V
EQUATION1820-ANSI V1 EN-US
a
IECEQUATION00022 V1 EN-US
4.
Compare the result with the set value (consider that the set value
the base voltage
5.
Repeat steps
signal disappears.
6.
Record the measured current and calculate the corresponding negative-sequence current
according to the equation.
Observe that the currents in the equation are phasors.
×
3
ANSIEQUATION00021 V1 EN-US
Where:
I
ANSIEQUATION00020 V1 EN-US
a
IECEQUATION00022 V1 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.
7.7.1.3
Measuring the operate value for the zero-sequence 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.
58
2
=
+
×
+ ×
V
V
a V
a V
2
A
B
C
V
and
A
B
C
p ×
2
3
j
= ×
= -
+
1
e
0, 5
j
3
2
VBase ) of the negative-sequence operating voltage.
1
and 2. Then slowly increase the measured current in one phase until the BLKV
=
+
2
×
+ ×
I
I
a
I
a I
2
A
B
C
,
I and I
A
B
C
p ×
2
3
j
= ×
= -
+
1
e
0, 5
j
3
2
© Copyright 2013 ABB. All rights reserved
= the measured phase voltages
3V2PU is in percentage of
= the measured phase currents
Busbar protection REB650
1MRK 505 289-UUS B
M1405-46 v8
(Equation 8)
(Equation 11)
M1405-72 v7
Commissioning manual
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