UP3LN1
UL1, UL2 or UL3 line 1 voltage inputs on the IED
UP3BB1
Bus1 voltage input on the IED
Testing the frequency difference
M2377-116 v11
The frequency difference test should verify that operation is achieved when the frequency difference
between bus and line is less than set value of
FreqDiffMax
and above set value of
FreqDiffMin
. The
test procedure below will depend on the settings used. Input STARTSYN must be activated during
the test.
FreqDiffMax
= 50.2 Hz
FreqDiffMin
= 50.01 Hz
tBreaker
= 0.080 s
1.
Apply voltages
1.1. U-Line = 100%
UBaseLine
and f-Line = 50.0 Hz
1.2. U-Bus = 100%
UBaseBus
and f-Bus = 50.15Hz
2.
Check that a closing pulse is submitted at a closing angle equal to calculated phase angle
value from the formula below. Modern test sets will evaluate this automatically.
Closing Angle = |( (f
Bus
– f
Line
) * tBreaker * 360 degrees) |
f
Bus
= Bus frequency
f
Line
= Line frequency
tBreaker = Set closing time of the breaker
3.
Repeat with
3.1. U-Bus = 100%
UBaseBus
and f-bus = 50.25 Hz, to verify that the function does not
operate when frequency difference is above limit.
4.
Verify that the closing command is not issued when the frequency difference is less than the set
value
FreqDiffMin
.
11.10.1.2
Testing the synchrocheck functionality
M2377-132 v9
During the test of SESRSYN for a single bay arrangement, these voltage inputs are used:
U-Line
UL1, UL2 or UL3 line 1 voltage input on the IED according to the connection in SMT
U-Bus
Bus voltage input on the IED according to the connection in SMT
Testing the voltage difference
M2377-194 v8
Set the voltage difference to 0.15 p.u. on the local HMI, and the test should check that operation is
achieved when the voltage difference
UDiffSC
is lower than 0.15 p.u.
The settings used in the test shall be final settings. The test shall be adapted to site setting values
instead of values in the example below.
Test with no voltage difference between the inputs.
Test with a voltage difference higher than the set
UDiffSC
.
1MRK 511 403-UEN Rev. L
Section 11
Testing functionality by secondary injection
Bay control REC670
159
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание REC670
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