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 SHP300-10120VAC / 1Phase The SHP300-10 is an advanced traffic cabinet AC Service surge protector. This superb hybrid protector was designed from the outset with the NEMA transient withstand specification in mind. The maximum clamp voltage of the protector (even at 20kA) is under 350 volts, which provides nearly a 50% safety margin when coordinated with NEMA TS1-2.1.6.2. Flexibility of installation is another design feature of the SHP300-10. The protector first and second stages are electrically separate (line side) for use in jurisdictions that require a line filter between stages. In addition, the first stage provides 20,000 ampere protection from MAIN NEUTRAL to GND as well as MAIN LINE to GND. This is an often overlooked feature which becomes significant in locales where NEUTRAL must be kept separate from earth ground inside the cabinet. The SHP300-10 hybrid design exhibits
performance levels unattainable with simple "shunt type"
protectors. The two active clamp stages, large inductor and shunt
capacitance effectively halt high rate-of-rise surge waveforms,
thus preventing initial voltage overshoot. The output clamp voltage
is never allowed to exceed 340 volts, even when subjected to a 20kA,
6 x 20µs waveform.
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