Testing The Synchronizing Function - ABB RET670 Commissioning Manual

Section 10
Testing functionality by secondary injection
ANSI05000481 V4 EN-US
Figure 43: General test connection for a breaker-and-a-half diameter with one-phase
10.10.1.1

Testing the synchronizing function

The voltage inputs used are:
V3PL1
V3PBB1
Testing the frequency difference
The frequency difference test should verify that operation is achieved when the frequency
difference between bus and line is less than 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.
1.2.
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
f
Bus
188
voltage connected to the line side
VA, VB or VC line 1 voltage inputs on the IED
Bus1 voltage input on the IED
VBaseLine and f-Line = 60.0 Hz
V-Line = 100%
VBaseBus and f-Bus = 60.15Hz
V-Bus = 100%
– f
Bus Line
= Bus frequency
ANSI05000481-4-en.vsd
FreqDiffMax and above set value of
) * tBreaker * 360 degrees) |
1MRK 504 154-UUS B
M2377-21 v8
M2377-116 v10
Commissioning manual