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TS3
1SDH000670R0002
L3852
27/44
8.3
AR1 trip unit functional test
1.
Prior to operate and / or carry out any replacements on the CB, this must be open, with discharged spring and
disconnected
2.
Remove the Trip unit ( DUT ) from the CB following the instructions in the installation manual of the CB n°
601534 003.
3.
Take note of the settings present on the trip unit ( DUT ); these settings must be reset after the test.
4.
Set the current and time values for the protection available on the DUT.
5.
Connect the extension cable to TS3.
6.
Connect the AR1/S1 test cable to the extension cable.
7.
Connect the XK1 and TC connections to the DUT.
Figure 17
8.
In order to set parameters and perform the test, follow the instructions in chapters
7.3
,
7.4
,
7.5
9.
Verify that the tripping time indicated in the TS3 display is corresponding to the expected one, as indicated in the
technical catalogue n° 649058.
10.
In case of changing of settings, insert the beginning value of threshold and time.
11.
Reinstall the trip unit ( DUT ) on the CB as indicated in the instruction manual of the CB n° 601534 003.
Example of test:
Current generation on phase L1
Setting on the trip unit for L S or L I protections.
Protection Curve
Trip
threshold
Trip time
I test
Expected
tripping
time
L
t =k/I
2
I1 = 1In
MIN
6In
2s
S
t =k
I2 = 8In
0,45s
10In
0,45s
I
I3 = 12In
15In
60ms
Table 10
