where:
t(s)
Operate time in seconds
TD1
Settable time multiplier of the function for step 1
V
Measured voltage
Vpickup> Set pickup 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 TD1 is set to 0.05 s (default value), then the TRST1 and
TRIP signals operate at a time equal to 0.250 s ± tolerance.
8.
The test above can be repeated to check the inverse time characteristic at different
voltage levels.
9.
Repeat the above-described steps for step
.
6.4.2.2
Completing the test
Continue to test another function or end the testing by setting the parameter
TestMode
to
Disabled
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/OV2PTOV(59,2U>)/OV2PTOV: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.
6.4.3
Two step residual overvoltage protection ROV2PTOV (59N)
Prepare the IED for verification of settings as outlined in
5.1 "Preparing the IED to verify
.
Values of the logical signals for ROV2PTOV (59N) are available on the local HMI under
Main menu/Tests/Function status/Voltage/ROV2PTOV(59N,2UN>)/ROV2PTOV:
1
. The Signal Monitoring in PCM600 shows the same signals that are available on the
local HMI.
6.4.3.1
Verifying the settings
1.
Apply the single-phase voltage either to a single-phase voltage input or to a residual
voltage input with the pickup value below the set value
Pickup1
.
2.
Slowly increase the value until PU_ST1 appears.
3.
Note the operate value and compare it with the set value.
4.
Decrease the voltage slowly and note the reset value.
Section 6
1MRK 505 293-UUS A
Testing functionality
78
Commissioning manual
