Values of the logical signals for OEXPVPH are available on the local HMI under
Main menu/Tests/Function status/Voltage/OEXPVPH(24,U/f>)/1:OEXPVPH
.
The Signal Monitoring in PCM600 shows the same signals that are available on the
local HMI.
6.5.4.1
Verifying the settings
1.
Enable function.
2.
Connect a symmetrical three-phase voltage input from the test set to the
appropriate connection terminals of the overexcitation protection OEXPVPH.
OEXPVPH is conveniently tested using rated frequency for the injection
voltage and increasing the injection voltage to get the desired overexcitation
level.
3.
Connect the alarm contact to the timer and set the time delay
tAlarm
temporarily to zero.
4.
Increase the voltage and note the operate value
V/Hz>
.
5.
Reduce the voltage slowly and note the reset value.
6.
Set the alarm time delay to the correct value according to the setting plan and
check the time delay, injecting a voltage corresponding to 1.2 ·
V/Hz>
.
7.
Connect a trip output contact to the timer and temporarily set the time delay
tMin
to 0.5s.
8.
Increase the voltage and note the
V/Hz>>
operate value
9.
Reduce the voltage slowly and note the reset value.
10. Set the time delay to the correct value according to the setting plan and check
the time delay
tMin
, injecting a voltage corresponding to 1.2 ·
V/Hz>>
.
11. Check that trip and alarm contacts operate according to the configuration logic.
12. Finally check that START and TRIP information is stored in the event menu.
6.5.4.2
Completing the test
Continue to test another function or end the testing by setting the parameter
TestMode
to
Off
under
Main menu/Tests/IED test mode/1:TESTMODE
. If
another function is tested, then set the parameter
Blocked
to
No
under
Main menu/
Tests/Function test modes/Voltage/OEXPVPH(24,U/f>)/1:OEXPVPH
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.
6.6
Testing frequency protection functions
6.6.1
Underfrequency protection SAPTUF
Prepare the IED for verification of settings as outlined in
.
1MRK 504 126-UEN -
Section 6
Testing functionality
61
Commissioning Manual