Completing The Test; Voltage Protection; Two Step Undervoltage Protection Uv2Ptuv; Verifying The Settings - ABB Relion 670 Series Commissioning Manual

1MRK 511 403-UEN E
11.4.16.2

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.
11.5

Voltage protection

11.5.1

Two step undervoltage protection UV2PTUV

Prepare the IED for verification of settings as outlined in section
section
11.5.1.1

Verifying the settings

Verification of start value and time delay to operate for Step 1
1. Check that the IED settings are appropriate, especially the START 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 START signal appears.
4. Note the operate value and compare it with the set value.
For phase-to-earth measurement:
U
1
100
IECEQUATION2430 V1 EN-US
For phase-to-phase measurement:
U
1
100
IECEQUATION2431 V1 EN-US
5. Increase the measured voltage to rated load conditions.
6. Check that the START signal resets.
7. Instantaneously decrease the voltage in one phase to a value about 20% lower than the
measured operate 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 × U1<.
( )
t s
IECEQUATION2428 V1 EN-US
Bay control REC670
Commissioning manual
"Preparing for test" in this chapter.
1 out of 3 operation mode.
The operate value in secondary volts is calculated according to the
following equations:
UBase VT
sec
<
× ×
VTprim
3
VT
sec
<
UBase
× ×
VTprim
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
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Testing functionality by secondary injection
GUID-8A33AACE-7B89-4981-A872-78044BB1FD0D v2
TESTMODE setting to Off .
"Requirements" and
(Equation 20)
(Equation 21)
(Equation 22)
Section 11
SEMOD53540-1 v1
M13796-2 v6
M13796-9 v3
M13796-29 v10
121