12.5.17
Accidental energizing protection for synchronous generator
AEGPVOC
GUID-6E141754-28E5-408D-955F-899720BA59E0 v2
Prepare the IED for verification of settings outlined in
section "Requirements" and section "Preparing
for test" in this chapter.
12.5.17.1
Verifying the settings
GUID-B834BA0F-E8CE-4B08-9FCE-B6D2813D3197 v3
1.
Connect the test set for three-phase current injection and for three phase voltage
injection to the appropriate IED terminals.
2.
Inject zero voltage to the IED.
3.
Increase the injected symmetric three phase current slowly and note the operated value
(start value) of the studied step of the function.
4.
Decrease the current slowly and note the reset value.
5.
Connect a trip output contact to a timer.
6.
Set the injected current to 200% of the operate level of the tested stage, switch on the
current and check the time delay.
7.
Check that all trip and start contacts operate according to the configuration (signal
matrises).
8.
Finally check that start and trip information is stored in the event menu.
9.
Inject rated symmetric three phase voltage to the IED.
10. Set the injected current to 200% of the operate level of the tested stage, switch on the
current. The function does not start and trip.
11.
Inject 95% of the set
ArmU< value symmetric three-phase voltage to the IED.
12.
Set the injected current to 200% of the operate level of the tested stage, switch on the
current. The function does start and trip.
12.5.18
Voltage-restrained time overcurrent protection VRPVOC
GUID-764DA61A-D987-4358-867A-DA43ADDC6E57 v5
Prepare the IED for verification of settings as outlined in section
and
in this chapter.
12.5.18.1
Verifying the settings
GUID-3A2B7FF5-330E-4A0D-AB74-EBAE6258C176 v1
Verifying settings by secondary injection
GUID-39632D30-A8D8-417D-985C-8F886106783E v4
1.
Connect the test set for three-phase current injection and three-phase voltage injection
to the appropriate IED terminals.
2.
Go to Main menu/Settings/IED Settings/Current protection/VoltageRestOverCurr
( 51V,2(I>/U<))/VRPVOC (51V,2(I>/U<)):1/General and make sure that the function is
enabled, that is,
Operation is set to On.
3.
The test of the function may be performed by injecting restrain voltage and increasing
the injected current(s). Note the value at which the START and STOC signals are set.
In the following equations, restrain voltage is the magnitude of the
minimum phase-to-phase voltage in secondary volts.
The set operate value in secondary amperes is calculated according to the following
equations:
First part of the characteristic (Restrain voltage ≤ 25% of
UBase):
Section 12
1MRK 502 067-UEN B
Testing functionality by secondary injection
178
Commissioning manual
