Completing The Test - ABB RET670 Commissioning Manual

1MRK 504 154-UUS B
10.5.16.2

Completing the test

Continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
10.6 Voltage protection
10.6.1 Two step undervoltage protection UV2PTUV (27)
Prepare the IED for verification of settings as outlined in section
section "Preparing for test"
10.6.1.1 Verifying the settings
Verification of PICKUP value and time delay to trip for Step 1
1. Check that the IED settings are appropriate, especially the PICKUP value, the definite time
delay and the
2. Supply the IED with three-phase voltages at their rated values.
3. Slowly decrease the voltage in one of the phases, until the PICKUP signal appears.
4. Note the trip value and compare it with the set value.
For phase-to-ground measurement:
Vpickup
ANSIEQUATION2430 V1 EN-US
For phase-to-phase measurement:
Vpickup
ANSIEQUATION2431 V1 EN-US
5. Increase the measured voltage to rated load conditions.
6. Check that the PICKUP signal resets.
7. Instantaneously decrease the voltage in one phase to a value about 20% lower than the
measured trip value.
8. Measure the time delay for the TRIP signal, and compare it with the set value.
9. Check the inverse time delay by injecting a voltage corresponding to 0.8 × Vpickup<.
Commissioning manual
in this chapter.
1 out of 3 operation mode.
The trip value in secondary volts is calculated according to the following
equations:
<
VBase VT sec
´ ´
100 VTprim
3
<
VT sec
´ ´
VBase
100 VTprim
For example, if the inverse time curve A is selected, the trip signals TRST1 and
TRIP trip after a time corresponding to the equation:
Testing functionality by secondary injection
GUID-8A33AACE-7B89-4981-A872-78044BB1FD0D v2
TestMode setting to Disabled .
"Requirements" and
(Equation 96)
(Equation 97)
Section 10
SEMOD53540-1 v1
M13796-2 v6
M13796-9 v3
M13796-29 v9
167