WEG MVW3000 A0040 V023, User Manual

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4-6 | MVW3000
4
Technical Data
4.2.2 Power Cell Boards and Connections
The electrical connection inside the cell is done by means of laminated busbars, insulated between each other
by means of insulating material compatible with the applied voltage level.
Gate driver
RX/TX fiber optic
Supply
Gate driver
Local controll
NE
R
S
T
FA
Figure 4.6: Standard power cell boards and connections of the MVW3000 (frame B)
The local control and power supply electronic boards are in the upper part of the cell, above the laminated
busbars, insulated and fastened to a metal base. The serial communication between the cell and the main control
module occurs by means of the local control board via the fiber optic interface.
The modulation signals leave the local control and go to the gate driver boards by via multiway flat cables. The
power supply provides the voltages of: 5 V, 15 V, -15 V, 24 V that feed all the cell control part (local control, gate
drivers and bypass system).
The celll connection to the link is carried out by means of clamps, located in the back part of the cell. There are
five connections per cell, connecting it to the transformer three-phase secondary winding (terminals R, S and T)
and to the serial circuit of the phase applied by terminals FA and NE (phase and neutral).
ATTENTION!
Electronic boards have components sensitive to electrostatic discharges. Do not touch directly
on components or connectors. If necessary, touch the grounded metallic frame before or use an
adequate grounded wrist strap.
4.3 CONTROL RACK
For the control power supply, the auxiliary voltage (220 Vac - 480 Vac) must have available and connected to the
specific terminal strip, located in the control panel. The provided transformer has taps for different voltages in the
primary winding and supplies 220 Vac in the secondary winding to feed all the low voltage circuits and exhaust
fans present in the product.
The MVW3000 control rack has four electronic boards, grouped in a mechanical assembly that enables better
visualization and access to the analog, digital and fiber optic interfaces. For this assembly, MVC3, MVC4, FOI3
and PIC2 boards are represented.