4.15.1
Cylindrical studs
The following table lists the studs for the STSG option:
Stud code
Drawing
Characteristics
PII72175
max short circuit current:
0.5 s: 33.5 kA
max short circuit current:
1.0 s: 23.7 kA
PII73175
max short circuit current:
0.5 s: 42.0 kA
max short circuit current:
1.0 s: 29.6 kA
PII74175
max short circuit current:
0.5 s: 42.0 kA
max short circuit current:
1.0 s: 29.6 kA
Table 67 - Studs characteristics
4.15.2
Surge arrester for STSG (code PII77175)
If a high voltage spike occurs on the line during the execution of the tests, the STSG surge arresters must be replaced.
Technical characteristics:
•
Nominal AC spark-over voltage : < 940 Vrms
•
Impulse spark-over voltage : < 1,600 Vpeak
•
Short-circuit proof with 25 kAeff/100 ms; 36 kAeff/75 ms
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