Hitachi Relion 670 Series Commissioning Manual page 189

1MRK506371-UUS Rev. M
1. Apply a 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 trip 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 trip value for one phase.
6. Measure the time delay for the TRST1 signal and compare it with the set value.
7. Check the inverse time delay by injecting a voltage corresponding to 1.2 × Vpickup>.
( )
t s
IECEQUATION2429 V1 EN-US
( )
t s
ANSIEQUATION2429 V1 EN-US
where:
t(s)
TD1
V
Vpickup> Set pickup voltage for step 1
For example, if the measured voltage jumps from 0 to 1.2 times the set pickup voltage level and
time multiplier TD1 is set to 0.05 s (default value), then the TRST1 and TRIP signals trip at a time
equal to 0.250 s ± tolerance.
8. Repeat the test for Step 2 of the function.
11.6.3.3 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.6.4 Overexcitation protection OEXPVPH (24)
Prepare the IED for verification of settings outlined in Section
11.6.4.1 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 (24) is configured for a three-phase voltage
input.
Line distance protection REL670
Commissioning manual
For example, if the inverse time curve A is selected, the trip signals TRST1 and TRIP trip
after a time corresponding to the equation:
k 1
=
 
U
−
1
 
>
 
U 1
TD 1
=
æ ö
V
-
1
ç ÷
>
Vpickup
è ø
Trip time in seconds
Settable time multiplier of the function for step 1
Measured voltage
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Testing functionality by secondary injection
"Preparing the IED to verify
Section 11
(Equation 99)
(Equation 100)
SEMOD54358-38 v4
M6583-45 v5
settings".
M6583-49 v4
183