6SP44005 belongs to Reliance SP600 series three-phase AC variable frequency drive, originally manufactured by Reliance Electric and later acquired by Rockwell Automation with discontinued original production. This unit is rated 5HP(3.7kW), standard NEMA1 IP20 cabinet configuration with detachable LCD OIM operation panel. Available supply covers unused surplus stock and fully load tested refurbished units, widely used as spare replacement for outdated pump, fan and conveyor driving systems in traditional industrial equipment renovation.

6SP stands for SP600 series inverter base code. The first digit 4 means 380~480V three-phase input voltage grade. The second digit 4 represents NEMA1 standard enclosure specification. 005 corresponds to rated power 5HP(3.7kW) with matching rated output current. Standard default configuration includes built-in dynamic braking transistor without factory pre-mounted EMI filter.

Rated input is three-phase 380~480VAC, 50/60Hz. Output voltage range 0~460VAC, output adjustable frequency 0~400Hz, rated continuous output current 8.4A, nominal power 5HP(3.7kW). Overload capacity supports 150% rated current for 60 seconds heavy startup load and 110% rated current for continuous regular running. Adjustable carrier frequency 2kHz~16kHz, protection enclosure class IP20/NEMA1. Operating ambient temperature -10℃~+40℃, storage temperature -40℃~+85℃, working humidity 5%~95% non-condensing environment, UL and CSA safety certified. Pre-installed internal brake IGBT with reserved terminals for external braking resistor connection.

Front detachable LCD OIM keypad completes onsite parameter setting, real-time running data monitoring and manual jog operation, supporting remote operation panel extension via dedicated interface cable. Main power terminals contain R/S/T three-phase input and U/V/W motor output terminals. Independent control terminal block is equipped with 6-channel digital input, 2-channel analog input supporting 0~10VDC and 4~20mA dual signal, 2-channel relay output for equipment running and fault signal feedback. Standard onboard RS485 interface realizes Modbus RTU communication with upper PLC system, optional DeviceNet expansion card can be installed for fieldbus networking control.

Supports V/F open-loop control and sensorless vector control two working modes, built-in automatic motor parameter identification to quickly complete motor parameter matching. Embedded closed-loop PID algorithm for constant pressure and constant flow regulation applicable to fan and pump loads, with multiple groups of preset multi-speed parameters configurable. Multiple stop modes including ramp stop, S-curve deceleration, DC injection braking and coast free stop for different load requirements. Full protection functions cover overcurrent, overvoltage, undervoltage, radiator overheat, input phase missing, output short-circuit and motor overload, historical fault codes can be stored for troubleshooting, equipped with automatic restart function after instantaneous power failure recovery.

Mainly applied to small-power industrial loads including factory circulating water pump, workshop exhaust fan, light-load conveying machinery, food processing transmission equipment and textile auxiliary motors. Commonly used for spare replacement and maintenance renovation of old automation systems in water treatment, building ventilation and light chemical industry.

Cut off three-phase main power supply and wait no less than 30 minutes for internal DC bus capacitor full discharge before opening cabinet cover, wiring modification or component inspection. Quarterly maintenance needs to blow dust accumulated on radiator and internal circuit with dry low-pressure compressed air, retighten all power and control terminal screws to avoid poor contact causing overheating damage. When frequent overload protection occurs without motor winding damage, recheck motor nameplate parameter setting and actual field load status. Select external braking resistor strictly according to factory specification when configuring braking function, forbid wrong high voltage access to low voltage control terminals to prevent internal circuit burnout.