FRENIC4800VM6 — water-cooled three-level 3.3 kV IGBT converter, 6.6–26.4 MVA
FRENIC4800VM6 is a regenerative medium-voltage frequency converter on a three-level IGBT circuit with a 3.3 kV output voltage and water cooling. A single unit is rated 6.6 MVA, and in a multiplex arrangement up to 26.4 MVA. It is used on reversing rolling mills and in wind tunnels.
- Output voltage
- 3 phases, 3.3 kV
- Rating
- 6.6 MVA per unit; 13.2 / 19.8 / 26.4 MVA with 2–4 units (multi-winding motor)
- Output frequency
- up to 100 Hz
- Overload
- 150% for 1 min
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The drive is built for machines with large motors and heavy dynamic duty, above all for reversing rolling mills. It also suits wind tunnels and other installations that need precise speed and torque control. A single unit is rated 6.6 MVA. Up to four units are combined in a multiplex arrangement to supply a multi-winding motor, giving 13.2, 19.8 or 26.4 MVA with two, three or four units.
The converter is regenerative and works in four quadrants. This means operation in both directions with energy returned to the grid during braking. The three-level PWM inverter reduces higher harmonics of the output voltage and motor torque ripple, so the load on the motor and the mill mechanics is lower. The three-level PWM rectifier minimizes grid harmonics and keeps the power factor close to unity, which reduces the required capacity of the supply network. Large general-purpose IGBT modules are used, hence fast response, low losses and a simple control circuit. The drive suits machines that need fast response and accurate torque in all four quadrants.
Vector control supports induction and synchronous motors. The speed control range is 1:1000, speed accuracy is ±0.01% of maximum speed, and torque accuracy is ±5% of rated. Output frequency reaches 100 Hz, and overload capacity is 150% for 1 min.
The IGBT modules are water-cooled, so the dimensions are smaller and the electrical room needs less air conditioning capacity. This system makes it possible to build a high-power converter more compactly. The cooling medium is industrial water with an inlet temperature of 5–35 °C. The flow rate is 280 l/min per 6.6 MVA with a 4 K temperature rise.
Control, setup and diagnostics are carried out from an 8.4-inch programmable panel. Available features include process line control functions accumulated at many metallurgical sites, communication via T-link, SX-bus and PROFIBUS-DP (option), and extended tracing and data collection tools. FRENIC4800 develops the FRENIC4000 series by adding three-level control. The range also includes FRENIC4400 for medium and large ratings and FRENIC4600 with a direct output without an output transformer.
Technical specifications
| Output voltage | 3 phases, 3.3 kV |
|---|---|
| Rating | 6.6 MVA per unit; 13.2 / 19.8 / 26.4 MVA with 2–4 units (multi-winding motor) |
| Output frequency | up to 100 Hz |
| Overload | 150% for 1 min |
| Control | vector control for induction and synchronous motors; range 1:1000, accuracy ±0.01%, torque ±5% |
| Mode | four-quadrant, regeneration; three-level PWM rectifier, cos φ ≈ 1 |
| Cooling | water (industrial water 5–35 °C, 280 l/min per 6.6 MVA, 4 K rise) |
| Communication | T-link, SX-bus, PROFIBUS-DP (option) |
Request a price and lead time
FRENIC4800VM6 — water-cooled three-level 3.3 kV IGBT converter, 6.6–26.4 MVA. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What is the rating of the FRENIC4800VM6 converter?
A single unit is rated 6.6 MVA. In a multiplex arrangement of two, three or four units it gives 13.2, 19.8 or 26.4 MVA for a multi-winding motor.
What are the speed and torque control accuracies?
The speed control range is 1:1000 with an accuracy of ±0.01% of maximum speed. Torque accuracy is ±5% of rated, and overload is 150% for 1 min.
What are the requirements for the cooling water?
Industrial water with an inlet temperature of 5–35 °C and a flow rate of 280 l/min per 6.6 MVA with a 4 K temperature rise.
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