+d
j
-d
j
U-Bus
U-Line operation
U-Bus
No operation
en05000551.vsd
IEC05000551 V1 EN-US
Figure 13: Test of phase difference
3.
Change the phase angle bdφ and -dφ and verify that the two outputs are
activated for phase differences between these values but not for phase differences
outside, see figure
.
Testing the frequency difference
M2377-232 v9
The frequency difference test should verify that operation is achieved when the
FreqDiffA and
FreqDiffM frequency difference is lower than the set value for manual and auto synchronizing
check,
FreqDiffA and FreqDiffM respectively and that operation is blocked when the frequency
difference is greater.
Test with frequency difference = 0 mHz
Test with a frequency difference outside the set limits for manual and auto synchronizing
check respectively.
1.
Apply voltages U-Line equal to 100%
GblBaseSelLine and U-Bus equal to 100%
GblBaseSelBus, with a frequency difference equal to 0 mHz and a phase difference lower
than the set value.
2.
Check that the AUTOSYOK and MANSYOK outputs are activated.
3.
Apply voltage to the U-Line equal to 100%
GblBaseSelLine with a frequency equal to 50
Hz and voltage U-Bus equal to 100%
GblBaseSelBus, with a frequency outside the set
limit.
4.
Check that the two outputs are not activated. The test can be repeated with different
frequency values to verify that the function operates for values lower than the set ones. If
a modern test set is used, the frequency can be changed continuously.
Testing the reference voltage
M2377-249 v5
1.
Use the same basic test connection as in figure
The voltage difference between the voltage connected to U-Bus and U-Line should be 0%,
so that the AUTOSYOK and MANSYOK outputs are activated first.
2.
Change the U-Line voltage connection to U-Line2 without changing the setting on the
local HMI. Check that the two outputs are not activated.
9.6.1.3
Testing the energizing check
M2377-262 v6
During the test of the energizing check function for a single bay arrangement, these voltage
inputs are used:
U-Line
UL1, UL2 or UL3 line1 voltage inputs on the IED
U-Bus
Bus voltage input on the IED
Section 9
1MRK 505 385-UEN C
Testing functionality by secondary injection
82
Breaker protection REQ650
Commissioning manual
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