RELIANCE 75V4051 complete integrated three-phase AC variable frequency drive
75V4051 is a complete integrated three-phase AC variable frequency drive belonging to Reliance GV3000/SE series, rated 75HP, 460VAC input specification. It is an all-in-one cabinet-type inverter integrating main power module, main control board, cooling fan unit and built-in operation keypad, manufactured for three-phase asynchronous motor speed regulation. The whole unit adopts full conformal coated internal circuit and reinforced cabinet shell to adapt to dusty, vibration-prone industrial production environments, widely used as original replacement spare drive for field equipment overhaul and failure replacement.
Description
1. Product Introduction
75V4051 is a complete integrated three-phase AC variable frequency drive belonging to Reliance GV3000/SE series, rated 75HP, 460VAC input specification. It is an all-in-one cabinet-type inverter integrating main power module, main control board, cooling fan unit and built-in operation keypad, manufactured for three-phase asynchronous motor speed regulation. The whole unit adopts full conformal coated internal circuit and reinforced cabinet shell to adapt to dusty, vibration-prone industrial production environments, widely used as original replacement spare drive for field equipment overhaul and failure replacement.
2. Model Definition Explanation
75 stands for rated matching motor power 75 horsepower; V represents GV3000 standard AC inverter product line code; 4051 is factory internal serial specification code corresponding to 460V three-phase input voltage grade and fixed internal power hardware configuration of this unit, marking standardized component layout and control software version of the drive.
3. Technical Specifications
Rated three-phase input voltage: 360~460VAC, 50/60Hz; matched motor rated power:75HP; output frequency range:0~400Hz. Operating ambient temperature:-10℃~+50℃, continuous full-load running over 40℃ requires good cabinet ventilation. Allowable ambient humidity ≤90% without condensation. Equipped with dual built-in cooling fans for forced air cooling; onboard multi-channel LED status indicators and 4-digit seven-segment parameter display screen with integrated 9-key local operation panel. Built-in hardware overcurrent, overvoltage, overload, overheat, phase loss and short-circuit protection functions.
4. Interface and Communication Configuration
Terminals include three-phase main power input terminals, motor output terminals, external analog speed reference terminals (0-10VDC/4-20mA), digital DI/DO dry contact terminals, fault relay output terminals. Factory default reserved expansion slot for optional fieldbus communication card (Modbus, DeviceNet). Local parameter setting via front panel keypad; remote speed adjustment realized by analog signal or optional bus communication wiring.
5. Core Functions
Realizes variable frequency closed-loop speed regulation for three-phase AC induction motor via SPWM inverter control. Supports multi-speed fixed operation, ramp acceleration/deceleration setting, PID closed-loop constant pressure/constant flow control. Automatically monitors input power and internal power module working status, triggers shutdown protection and external fault contact output once abnormal parameters exceed threshold value, stores fault code for maintenance inquiry. Compatible with constant torque and variable torque load application modes.
6. Application Scenarios
Mainly configured for heavy-duty AC drive equipment including metallurgical auxiliary transmission, large industrial fan, water pump, conveyor belt, printing machinery and textile main drive systems. Widely used in chemical, building material, machinery manufacturing industry for old equipment drive upgrading and faulty inverter replacement maintenance.
7. Operation and Maintenance Instructions
Cut off main incoming power completely before disassembly, wiring and maintenance to prevent high-voltage electric shock. Clean internal radiator fin and fan dust every 3~6 months according to site environment dust level. Regularly check fan rotation status, power terminal fastening tightness and electrolytic capacitor bulging/leakage. Stop running immediately upon frequent overheat or overload alarm, eliminate load abnormality or internal component damage before restarting; prohibit long-time over-rated load running of the inverter unit.
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