Here in Part 25, the series pair of 20 ohm @ 300 watt? CCS 'glitch resistors' are finally installed, along with the FWB diode board assy....and also the? BUSS? HVU-3,? HV fuse.? ?HV fuse installed in a pair of silver plated fuse holders, that also have end retainers built into the fuse holders.? Once fuse inserted into the fuse holders, it does not budge. It can't migrate out in either direction, due to the end stops. The end stops also allow the HV fuse to be mounted vertically, or horizontally.
The 40 ohms of total glitch resistance? ?LIMITS any fault current to a 'safe' value, while the HV fuse INTERRUPTS the fault current, and stupid fast, like < 2 msecs.? 6000 Vdc / 40 ohms =? 150 amps of fault current.? ?150 amps of fault current will open off the fast, 3 amp rated? BUSS HVU-3 fuse super fast...event over.? ?The drawback to the 40 ohm glitch resistor, of course is the? 120 vdc? V drop across it, when 3 amps of DC plate current flows though it.? There is no fix for that.
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