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.
We offer essential VFDs to help reduce energy consumption and ease maintenance costs for the 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.
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Performs with low distortion which lowers harmonics for the local grid, exceeding IEEE 519 and most utility codes.
Cascaded H-Bridge is a proven state-of-the-art topology featuring:
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An IGBT based multi-level voltage source inverter delivering low distortion output.
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This design eliminates the need for filters and can control legacy as well as modern motors.
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It is superior to 2 or 3 level inverters and far superior to current source inverter designs.
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High system reliability with neutral rebalancing. The drive will continue to run if a power module fails so an operator can plan a controlled shutdown.
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Maintenance is easy with a modular design, allowing fast swap out of power modules. The design also allows front access to all components.
Industry-leading power density for an optimal footprint
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This high power dense system optimizes floor space, and the modular/drawer structure is easy to maintain.
Fast lead times
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Contact Us to learn more.
Features
Technical Scope
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4160 V
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1000 - 5500 HP
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130 - 635 Amps
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Input Voltage - 4160V ±10%, optionally 3.3 - 13.8kV
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Input Voltage Frequency - 50/60 Hz, ±5%
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 |
Features | Technical Specifications |
|---|---|
Application | Fans, pumps, compressors, blowers, conveyors |
Power semiconductors | IGBT’s; Diodes |
Input voltage | 4160V ±10%, optionally 3.3 - 13.8kV |
Input overvoltage (swell) | 20% |
Input undervoltage (dip or sag) | -34%, continues operation with reduced torque |
Input voltage frequency | 50/60Hz, ±5% |
Line-side rectifier | 18 pulse diode rectifiers |
Input power factor | ≥0.95, load >10% |
Input current harmonics | Meet IEEE519 |
Motor-side inverter | Multi-level inverter (PWM) with IGBT power modules |
Output cable length | No filter needed if less than 2.2km |
Output voltage | 4/4.16kV |
Output frequency and drift | 0.5 ... 330 ± 0.5 % (sensor-less or open loop vector control), or ± 0.1 % with encoder (encoder or closed loop vector control) |
Drive quadrants | 2 |
Drive control methods | Sensor-less vector control, encoder vector control, VF control, open loop control, close loop control |