ABB TS3 Instruction Manual page 35

8.9 PR231-PR232 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 instructions sheet n°
1SDH000529R0501 and in the document n° 1SDH000606R0001 or 1SDH000606R0003 and getting started n°
1SDH000591R0001.
3. Take note of the settings present on the trip unit ( DUT ); this settings must be reset after the test.
For PR231 follow procedure from point 4 on
For PR232or PR231 with extracode:
Remove the key plug connected to the CB (That key plug must be reconnected to the tri unit after the test)
o
Connect the Key plug indicated in Figure 24 to the corresponding connector on the DUT
o
4. Connect the extension cable to TS3.
5. Connect the PR232x and PR33x test cable to the extension cable.
6. Connect the KM8 connector to the DUT.
7. Set the current and time values for the protection available on the DUT.
8. The trip unit is now ready for the test.
9. In order to set parameters and perform the test, follow the instructions in chapters 7.3, 7.4,
10. Verify that the tripping time indicated in the TS3 display is corresponding to the expected one, as indicated in the
technical catalogue n° 1SDC210015D0202.
11. Remove the key plug indicated in figure 24 used for testing .
12. Reinstall the trip unit ( DUT ) on the CB as indicated in the instructions sheet n° 1SDH000529R0501 and in the
document n° 1SDH000606R0001 or 1SDH000606R0003 and getting started n° 1SDH000591R0001.
Example of test on PR231:
Current generation on phase L1
Setting on the trip unit for L, S, I protections.
Protection
L
S
I
Table 16
.
TS3
888.902.6111
Figure 27
Trip
Curve Trip time
threshold
2
t=k/I I1 = 0.4In t1 = 3s
2
t=k/I I2 = 3In t2 = 0.1s
I3 = 5,5In
1SDH000670R0002
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7.5
Expected
I test tripping
time
2.4In 3s
3.6In 0.77s
 60ms
7In
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