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  • Users: motorspert
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  1. motorspert

    Surge test on generator field coil

    Hi We have been asked to perform a surge test on some salient pole field coils at 1500V. I am familiar with voltage drops using an AC supply at 50/60hz. Also aware of tests at higher frequencies (400Hz). But should I be concerned that user a standard surge tester (Baker type) we will overstress...
  2. motorspert

    66kV VT connection

    Hi We are trying to connect a cable from a 66kV bushing to a VT bushing. The clearances to earth are considerable and so a bare uninsulated copper bar or cable would suffice. But as the installation is outdoors and coastal we thought we would offer some environmental protection for the cable and...
  3. motorspert

    CT rating or class

    Hi we have been asked to replace a CT with class S10 to BS3938 - any idea what this is or was? is there a modern equivalent?? CT is stamped 1800/1A VA 15.0 S10 ohms 10.089 s Richard

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