Pr1 Trip Unit Functional Test - ABB TS3 Instruction Manual

8.4 PR1 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 PR1 test cable to the extension cable.
7. Connect the XK1 and TC connections to the DUT.
8. In order to set parameters and perform the test, follow the instructions in chapters 7.3, 7.4,
9. Verify that the tripping time indicated in the TS3 display is corresponding to the expected one, as indicated in the
document (ANNEX-PI3-15).
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 L2
Setting on the trip unit for L, S, I, G protections.
Protection
L
S
I
G*
Table 11
* See Note4 in chapter 8
888.902.6111
Figure 18
Trip
Curve
threshold
2
t=k/I I1 = 1In
t=k I2 = 6In
I3 = 10In
t=k I4 = 0.6In
TS3 1SDH000670R0002
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|
Expected
Trip time I test tripping
time
B 6In 5s
E 8In 0,6s
 60ms
12In
E 1In 0,8 s
7.5
L3852 28/44