Siemens 3PCI Series, Operation Manual

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Troubleshooting 3PCI SCR Power Controller Series Manual
5-4
s
Version 1.2 (19000325)
Symptom Possible Cause(s) Possible Solution(s)
replace it.
On units rated at 225 A and below:
Remove the fuse and check the
front-to- back SCR pairs by
measuring resistance between
terminals
L1
(of the SCR) and
X1
.
On the R
×
1 scale, the resistance
should be infinite in both directions.
If a shorted component is indicated
in any of these checks, replace it.
5.7. Replacement Fuses
Table 5-2 lists the replacement fuses for the various 3PCI models. The 3PCI may come supplied with fuses
having identifying numbers different from the numbers shown in the table. In such a case, the fuse may be
replaced either with an identical fuse or the one shown in the table.
Table 5-2. Fuse Specifications
Vendor Part Numbers
Amperes Buss Gould-Shawmut Carbone-Ferraz
25 FWP-40 A70P40 A070F040
40 FWP-60 A70P60 A070F060
60 FWP-125A A70P125 A070F125
90 FWP-125A A70P125 A070F125
120 FWP-150A A70P150 A070F150
180 FWP-225A A70P225 A070F225
225 FWP-300A A70P300 A070F300
350 FWP-450A n/a A070F450
500 FWP-600A A70P600 A070F600
650 FWP-800A A70P800 A070F800
800 FWP-1000A A70P1000 A070F1000
1000 FWP-1200A A70P1200 A070F1200
1200 n/a A70P1600 n/a
5.8. Torque Specifications
Torque specifications for 3PCI connections are given in Table 5-3 and Table 5-4.