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

Section 11
Testing functionality by secondary injection
IN
UN
3. Within the reset time (that is 5s with above setting) re-apply the above quantities again for
100ms and repeat this step for at least the same number of times as set under setting
UN>StartsNo (at least 4 times with above settings).
4. The following signals are given from the APPTEF function:
•
•
•
•
11.4.18.2

Completing the test

Continue to test another function or end the test by navigating to Main menu/Test/IED test mode/
TESTMODE: 1 and change the IEDTestMode setting to Off. 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 1 out of 3 operation mode.
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
100
IECEQUATION2430 V1 EN-US
120
STUN at the beginning of every injection period of 100ms.
WRNFW at the beginning of every injection period of 100ms
STFW and STIEF appear after the fourth injection period of 100ms (when UN>StartsNo
=4 as set above)
TRIP comes after 2s (set tTrip time) after the STFW signal has appeared
The dead time between two set injection pulses of 100ms is less than the set
tReset time, otherwise the function does not operate.
"Preparing for test" in this chapter.
The operate value in secondary volts is calculated according to the following
equations:
1 UBase VT sec
<
× ×
VTprim
3
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Magnitude=75mA; Angle=180 degrees
Magnitude=100V; Angle=0 degrees
GUID-FEA7B2D1-3F4A-43FD-98F8-EC3584E5B511 v1
"Requirements"
1MRK 511 403-UEN Rev. L
SEMOD53540-1 v1
M13796-2 v6
and
M13796-9 v3
M13796-29 v11
(Equation 20)
Bay control REC670
Commissioning manual