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TS3
1SDH000670R0002
L3852
26/44
8.2
S2 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°
600600.002.
3
Take note of the settings present on the trip unit ( DUT ); these settings must be reset after the test.
4
Do not disconnect the trip coil from the Trip Unit ( DUT ).
5
Set the current and time values for the protection available on the DUT.
6
Connect the extension cable to TS3.
7
Connect the S2 test cable to the extension cable.
8
Connect the S2 test cable the DUT.
Figure 16
9
If it is present G module, before testing L,S,I protection, remove G module and insert the bypass module
10
In order to set parameters and perform the test, follow the instructions in chapters
7.3
,
7.4
,
7.5
11
Verify that the tripping time indicated in the TS3 display is corresponding to the expected one, as indicated in the
technical catalogue n° 6000-3-84.
12
In case of changing of settings , insert the beginning value of threshold and time.
13
Reinsert the G module if has been substituted by the bypass module.
14
Reinstall the trip unit ( DUT ) on the CB as indicated in the instruction manual of the CB n° 600600.002
Example of test:
Current generation on phase L1
Setting on the trip unit for L, S, I, G protections.
Protection Curve
Trip
threshold
Trip time
I test
Expected
tripping
time
L
t=k/I
2
I1 = 1In
A
6In
2s
S
t=k
I2 = 8In
0,6s
10In
0,6s
I
I3 = 12In
14In
60ms
G*
t=k
I4 = 0.5In
0,5s
1In
0,5s
\
Table 9
* See Note4 in chapter
8
NOTA6: The G protection can be verified by current injection on phase L1, L2, L3 only.
