PWM variable-speed drive WD4000 series

three-phasefor conveyorfan

Overview
WD4000 medium-voltage variable frequency drives (VFD). Wolong is a leading manufacturer of high-voltage drives with 25 years of experience and a global installed base for industrial pump, fan, blower, compressor, and conveyor applications. The WD4000 family offers VFDs to help reduce energy consumption and ease maintenance costs for Mining, Oil & Gas, Water & Wastewater, Power Generation, and general processing industries.

Advantages

• Best-in-class 18-pulse phase shift transformer as standard starting at 1000 HP.
• Performs with low distortion which lowers harmonics for the local grid, exceeding IEEE 519 and most utility codes.
• Cascaded H-Bridge topology: IGBT based multi-level voltage source inverter delivering low distortion output.
• Eliminates the need for filters and can control legacy as well as modern motors.
• Superior to 2- or 3-level inverters and far superior to current source inverter designs.
• High system reliability with neutral rebalancing; drive can continue to run if a power module fails, allowing planned controlled shutdowns.
• Modular design for easy maintenance and fast swap out of power modules; front access to components.
• Industry-leading power density for an optimal footprint.
• Fast lead times.

Features

• Application: Fans, pumps, compressors, blowers, conveyors.
• Power semiconductors: IGBT’s; Diodes.
• Input Voltage: 4160V ±10%, optionally 3.3 - 13.8 kV.
• Input Voltage Frequency: 50/60 Hz, ±5%.
• Input overvoltage (swell): 20%.
• Input undervoltage (dip or sag): -34%, continuous operation with reduced torque.
• Line-side rectifier: 18 pulse diode rectifiers.
• Input power factor: ≥0.95 (load > 10%).
• Input current harmonics: Meets IEEE519.
• Motor-side inverter: Multi-level inverter (PWM) with IGBT power modules.
• Output cable length: No filter needed if less than 2.2 km.
• Output voltage: 4 / 4.16 kV.

Model Ratings
Type | Rated Motor Voltage (kV) | Current (A) | Shaft Output (HP) | Shaft Output (kW)
WD4000-4-130 | 4.16 | 130 | 1000 | 746
WD4000-4-159 | 4.16 | 159 | 1250 | 933
WD4000-4-190 | 4.16 | 190 | 1500 | 1119
WD4000-4-222 | 4.16 | 222 | 1750 | 1306
WD4000-4-254 | 4.16 | 254 | 2000 | 1492

Technical specifications

• Series: WD4000
• Rated motor voltage: 4.16 kV (standard)
• Optional input voltage range: 3.3 - 13.8 kV
• Power range: 1000 - 5500 HP
• Current range shown on page examples: 130 - 635 A
• Line-side rectifier: 18-pulse diode rectifiers
• Motor inverter: Multi-level PWM inverter with IGBT power modules
• Meets IEEE 519 for input current harmonics
• Input power factor: ≥0.95 at load > 10%
• Output voltage examples: 4 / 4.16 kV
• No output filter required for cable runs < 2.2 km
• Design highlights: cascaded H-bridge topology, modular power modules, neutral rebalancing for high reliability