where:
t(s)
Operate time in seconds
k1
Settable time multiplier of the function for step 1
U
Measured voltage
U1>
Set start voltage for step 1
For example, if the measured voltage jumps from 0 to 1.2 times the set start voltage level
and time multiplier k1 is set to 0.05 s (default value), then the TR1 and TRIP signals
operate at a time equal to 0.250 s ± tolerance.
8.
7.4.3.2
Completing the test
SEMOD54358-38 v4
Continue to test another function or end the testing by setting the parameter
TestMode to Off
under Main menu/Tests/IED test mode/TESTMODE:1. If another function is tested, then set
the parameter
Blocked to No under Main menu/Tests/Function test modes/Voltage/
ROV2PTOV(59N,2UN>)/ROV2PTOV:1 for the function, or for each individual function in a chain,
to be tested next. Remember to set the parameter
Blocked to Yes, for each individual function
that has been tested.
7.4.4
Loss of voltage check LOVPTUV
SEMOD175023-3 v5.1.1
Prepare the IED for verification of settings as outlined in section
Values of the logical signals for LOVPTUV are available on the local HMI under Main menu/
Tests/Function status/Voltage/LOVPTUV(27,U<)/LOVPTUV:1. The Signal Monitoring in
PCM600 shows the same signals that are available on the local HMI.
7.4.4.1
Measuring the operate limit of set values
SEMOD175023-7 v6
1.
Check that the input logical signals BLOCK, CBOPEN and VTSU are logical zero.
2.
Supply a three-phase rated voltage in all three phases and note on the local HMI that the
TRIP logical signal is equal to the logical 0.
3.
Switch off the voltage in all three phases.
After set
tTrip time a TRIP signal appears on the corresponding binary output or on the
local HMI.
Note that TRIP at this time is a pulse signal, duration should be according
to set
tPulse.
4.
Inject the measured voltages at rated values for at least set
tRestore time.
5.
Activate the CBOPEN binary input.
6.
Simultaneously disconnect all the three-phase voltages from the IED.
No TRIP signal should appear.
7.
Inject the measured voltages at rated values for at least set
tRestore time.
8.
Activate the VTSU binary input.
9.
Simultaneously disconnect all the three-phase voltages from the IED.
No TRIP signal should appear.
10. Reset the VTSU binary input.
11.
Inject the measured voltages at rated values for at least set
tRestore time.
1MRK 505 293-UEN B
Section 7
Testing functionality
Breaker protection REQ650
69
Commissioning manual
© Copyright 2013 ABB. All rights reserved
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