FIELD: power units designed to ensure spark safety of loads.
SUBSTANCE: proposed device 200 designed to supply with power spark-proof load provided with feedback circuit of integrated current supply and current limiting component and also to minimize voltage that should be limited in compliance with sparking safety standards has power supply PS and output terminals T1-T2 for connecting device to spark-proof load. Voltage limiting unit Z1 inserted between power supply PS and output terminals T1-T2 is used to limit voltage across load leads. Current limiting unit 202 has barrier resistors designed for current-to-voltage conversion to provide for comparison by operational amplifier that controls variable impedance Q1 and limits current supply to load.
EFFECT: reduced manufacturing cost, improved sparking safety.
19 cl, 3 dwg
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