Table of Contents
Advertisement
Section 11
Testing functionality by secondary injection
11.6.2.3
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.6.3
Two step residual overvoltage protection ROV2PTOV
Prepare the IED for verification of settings outlined in Section
11.6.3.1
Function revision history
Document
revision
A
B
C
D
E
F
H
J
11.6.3.2
Verifying the settings
1.
Apply a single-phase voltage either to a single-phase voltage input or to a residual voltage
input with the start value below the set value U1>.
2.
Slowly increase the value until ST1 appears.
3.
Note the operate value and compare it with the set value.
4.
Decrease the voltage slowly and note the reset value.
5.
Set and apply a 20% higher voltage than the measured operate value for one phase.
6.
Measure the time delay for the TR1 signal and compare it with the set value.
7.
Check the inverse time delay by injecting a voltage corresponding to 1.2 × U1>.
( )
t s
IECEQUATION2429 V1 EN-US
where:
t(s)
k1
U
U1>
8.
Repeat the test for Step 2 of the function.
184
Product
History
revision
2.2.1
-
2.2.1
-
2.2.2
-
2.2.3
-
2.2.3
-
2.2.4
-
2.2.4
-
2.2.5
-
For example, if the inverse time curve A is selected, the trip signals TR1 and TRIP
operate after a time corresponding to the equation:
k
1
=
U
−
1
>
U
1
Operate time in seconds
Settable time multiplier of the function for step 1
Measured voltage
Set start voltage for step 1
© 2017 - 2022 Hitachi Energy. All rights reserved
1MRK 505 378-UEN Rev. K
"Preparing the IED to verify
GUID-22110E0B-DEFB-461F-A437-4D221DB88799 v2
Line differential protection RED670
Commissioning manual
M13806-43 v6
SEMOD54358-3 v7
settings".
SEMOD54358-35 v11
(Equation 102)
Advertisement
Table of Contents
