Discharge circuits and loads Page: 44 of 62
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DISCHARGE CIRCUITS AND LOADS
FIGURE 20: INVERSE VOLTAGE APPEARING DURING LOAD FAULTS AND NONLINEAR
CIRCUITS TO CONTROL THIS VOLTAGE
NOTE: The switch still must hold off * VN/2 during the remainder of the
time i. Normally restrikes of the switch occur infrequently during these
conditions. Adding an "end-of-line clipper" reduces the voltage by another
factor of 2, clamping the PFN reversal to u Vdc/2. With fast circuitry
they are "often replaced" and an inverse diode network only is used.
NOTE: True tetrode thyratrons are highly damage resistant to inverse inter-
nal arcing They should be used whenever possible.
NONLINFAR CIRCUITS: The "mov" and "thyrite" materials have I a (V - V )6
so that they can replace all or a portion of RD tu reduce diode d and
allow larger peak currents:
< 3 s (Westirnyhouse 20 A stacks)
< 1 (Westinghouse 5 A stacks)
-CONSULT MFR FOR PEAK CURRENT LIMITATIONS: Generally I2pkt energy limit
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Sarjeant, W.J. Discharge circuits and loads, report, October 15, 1980; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1061299/m1/44/: accessed April 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.