Re: HP 3403C True RMS Voltmeter display fault
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Nah...
3-phase fed 500V raw DC rectifier stage in an 8kW TWTA, PSU let go.
The flames reached the ceiling in the workshop!? While the 32A wall breaker/RCD trip failed to open.
We had a few such events like that.? All were US built high power kit, with VDR's that failed in cascade, running on UK standard 400V 3P&N supplies, that were designed & built for use in the UK.? ("On the edge" rated?)
The high power RCT converter, & the 15kV HV secondary side of the PSU was tame by comparison.
Not fun at the time.
Dave 'KBV.
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