... , pump,Technical specificationControl mode: OLV, V/F, Frequency width: 0.01-600.00HzDigital channels: 7 inputs, 2 outputs, programmableAnalog channels ... voltage regulation ( AVR)Built-in braking chopper for standard inverter 0.75-15kw3 separate AC chokes on input side of standard ... inverter 90-400kWMore than 9 error protections such as short circuit ...