Verification of START value and time delay to operate
M16289-17 v7
1.
Check that the IED settings are appropriate, for example the start value and
the time delay.
2.
Supply the IED with three-phase voltages at their rated values and initial
frequency.
The initial frequency is calculated using Equation
.
0.02
/ 0.04
0.04
r
StartFrequency
floor f
StartFrequency
IECEQUATION16059 V1 EN-US
(Equation 91)
3.
Slowly decrease the voltage frequency by steps of 40 mHz until the START
signal appears; during each step apply the voltage signal for a time that is
either at least 10% longer than (
tDelay
+100ms) or a suitable time to monitor
the function.
4.
Note the frequency value at which the START signal appears and compare it
with the set value
StartFrequency
.
5.
Increase the frequency until its rated value is reached.
6.
Check that the START signal resets.
7.
Supply the IED with three-phase voltages at their rated values and frequency
20 mHz over the set value
StartFrequency
.
8.
Decrease the frequency with a 40 mHz step, applying it for a time that is at
least 10% longer than (
tDelay
+100ms).
9.
Measure the time delay of the
TRIP
signal, and compare it with the set value
tDelay
. Note that the measured time consists of the set value of the time delay
plus the minimum operate time of the start function (80 - 90 ms).
Extended testing
M16289-31 v6
1.
The test above can be repeated to check the time to reset.
2.
The tests above can be repeated to test the frequency dependent inverse time
characteristic.
Verification of the low voltage magnitude blocking
M16289-39 v7
1.
Check that the IED settings are appropriate, for example the
StartFrequency
,
UMin
, and the
tDelay
.
2.
Supply the IED with three-phase voltages at rated values.
3.
Slowly decrease the magnitude of the applied voltage, until the BLKDMAGN
signal appears.
4.
Note the voltage magnitude value and compare it with the set value
UMin
.
5.
Slowly decrease the frequency of the applied voltage, to a value below
StartFrequency
.
6.
Check that the START signal does not appear.
7.
Wait for a time corresponding to
tDelay
, make sure that the TRIP signal does
not appear.
1MRK 506 383-UEN A
Section 9
Testing functionality by secondary injection
Line distance protection REL650 2.2 IEC
127
Commissioning manual
Содержание REL650 series
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