ABB E3EFa HENF452750R1 Counter card

All EMI power supplies are designed to minimize risk of fire or shock hazards. This instrument received comprehensive mechanical and electrical inspection prior to shipment. Nevertheless, certain safety precautions must be observed. Only technically competent personnel familiar with the principles of electrical safety should operate this supply. To prevent fire or shock hazard, the power supply should not be exposed to water or moisture. Electrical safety should be maintained at all times.

Lethal voltages are developed within the power supply's enclosure.

 Therefore, the power supply must always be unplugged prior to removing the cover. If the input to the power supply is hard-wired, the circuit breaker must be secured and the line fuses removed. Of course, dangers are inherent in high voltage equipment. However, a power supply with a low voltage output is also potentially dangerous considering the amount of energy (current) the supply is capable of delivering. In addition to the steady state energy available, power supplies are typically terminated by very large capacitors, which can deliver huge surge currents capable of vaporizing metallic objects such as screwdrivers or jewelry. This could result in molten metal being sprayed.

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