6SB401-034CTANA belongs to Reliance SP600 high-performance general-purpose AC variable frequency drive series, later acquired by Rockwell Automation and original production discontinued. It is rated 25HP/18.5kW industrial inverter with NEMA1(IP20) cabinet structure, standard equipped with local LCD operation panel(OIM). Available supply includes original surplus unused stock and full load-tested refurbished units, widely used for legacy production equipment replacement and technical retrofit of fan, pump and conveyor drive system.

6SB401 = core series code for SP600 480V three-phase input inverter platform; 034 stands for rated continuous output current 34A corresponding to 25HP/18.5kW power grade; C=480V(460V) three-phase input voltage specification; T=standard built-in braking transistor; A=NEMA1 IP20 open vented enclosure; final NA=standard configuration without factory pre-installed input EMI filter option.

Rated input: three-phase 380–480VAC, input frequency 50/60Hz; three-phase output voltage 0~480VAC, output frequency range 0–400Hz, rated continuous output current 34A, nominal rated power 25HP(18.5kW). Overload capability: 150% rated current for 60s heavy-load startup, 110% continuous normal-duty rating. Adjustable carrier frequency 2kHz~16kHz, protection enclosure NEMA1/IP20. Operating ambient temperature -10℃~+40℃, storage temperature -40℃~+85℃, working humidity 5%~95% non-condensing, certified UL, CSA industrial safety standards. Built-in dynamic braking transistor with reserved external braking resistor terminal for rapid deceleration load.

Front side configurable detachable LCD OIM operation panel with parameter setting, real-time data display and manual jog function, supports remote panel extension via dedicated communication port. Main terminal area: R/S/T three-phase AC power input, U/V/W motor output terminals; independent multi-channel control terminal block including 6-channel digital input, 2-channel analog input(0–10VDC/4–20mA), 2-channel relay output for fault and running status feedback. Standard onboard RS485 communication interface supports Modbus RTU protocol for PLC centralized network control, optional DeviceNet fieldbus expansion card for industrial bus networking upgrade.

Adopts advanced V/F plus sensorless vector dual control algorithm to realize high-precision speed regulation for three-phase asynchronous motor, built-in auto motor parameter identification function for fast matching motor parameters. Supports multi-stage preset speed, PID closed-loop constant pressure/constant flow control for fan-pump application; configurable ramp stop, DC injection braking, free coast stop multiple stop modes. Complete full-range protection logic covering overcurrent, overvoltage, undervoltage, overheat, input phase loss, output short circuit and motor overload, stores multiple groups historical fault codes for maintenance troubleshooting, equipped power failure automatic restart and transient power drop ride-through function.

Mainly used for medium-power industrial load drive: industrial water supply pump, centrifugal ventilation fan, factory long-distance conveyor system, cement packaging equipment, chemical process auxiliary transmission, textile printing and dyeing machinery, metallurgy auxiliary roller drive; common for old equipment spare replacement in water treatment, building ventilation, light chemical and mining auxiliary automation fields.

Cut off three-phase main power and wait minimum 30 minutes for internal DC bus capacitor full discharge before cabinet opening, wiring modification or component inspection. Half-yearly regular maintenance: use dry low-pressure compressed air to clean radiator and internal circuit dust, check tightening torque of power and control terminal screws to avoid loose connection heating burnout. When drive frequently triggers overload protection without motor winding damage, re-calibrate motor nameplate parameters and load operating condition; match external braking resistor strictly according to factory rated parameter when configuring dynamic braking function, forbid high voltage access to low voltage control terminals.