HK18 series photovoltaic special knife switch is suitable for control circuits with AC 50Hz, rated voltage up to 400V and below, and rated impulse withstand voltage of 6kV and used as infrequent manual connection, disconnection and isolation of the circuits in household appliances and industrial enterprise distribution systems, greatly improving personal safety protection performance and preventing accidental electric shock. This product complies with GB/T14048.3 and IEC60947-3 standards.