Completing The Test - Hitachi RET670 Commissioning Manual

1MRK 504 165-UEN Rev. K
IN
UN
1) Inject lower voltage than 50V for high-ohmic EF test
3. The following signals shall be given from the APPTEF function:
•
•
•
Test of function operation for intermittent EF
1. Change the following settings from the default values:
•
•
•
•
•
2. Inject manually the following analogue quantities given in secondary amperes and volts but
only for 100ms (in order to avoid STFW signal which is delayed for 150ms):
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:
•
•
•
•
11.5.19.2

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.
Transformer protection RET670
Commissioning manual
1)
STUN at the beginning of injection.
WRNFW, and STFW after approximately 650ms
TRIP after approximately 2.65s
OperationMode = Start and Trip in order to obtain the trip signal
IN>=5% (default value)
IMinForward=2.5% (use the default value)
UN>StartsNo=4 (default, but it can be changed if required)
tReset=5.0s (set maximum value in order to make the test process easier)
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.
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Testing functionality by secondary injection
Magnitude=75mA; Angle=180 degrees
Magnitude=45V; Angle=0 degrees
GUID-ADDA3A73-9884-41B1-96D0-EE9653004E96 v1
Magnitude=75mA; Angle=180 degrees
Magnitude=100V; Angle=0 degrees
GUID-FEA7B2D1-3F4A-43FD-98F8-EC3584E5B511 v1
Section 11
193