✅ FULL INFORMATION ABOUT THIS PANEL
A VFD (Variable Frequency Drive) panel is used to start, stop, protect, and control the speed of an electric motor. It adjusts the power supply frequency and voltage to regulate the motor’s speed as needed for different operations. This makes it safer, more efficient, and easier to control than traditional systems.
1. Main Supply Section
This part of the panel brings electrical power into the system and distributes it to other sections.
It includes Miniature Circuit Breakers (MCBs) made by Schneider, rated at 10A, C63, and similar values. One MCB supplies power to the VFD, while another powers the control circuit.
Purpose
Provides protection from short circuits and overloads.
Allows safe isolation of circuits during maintenance.
Ensures overall system safety and reliability.
2. Motor Control Section (Middle Left)
This section controls how the motor operates and protects it against faults. It has Schneider TeSys contactors for turning the motor ON and OFF, and for allowing safe interlocking and remote or manual control options.
The Thermal Overload Relay (OLR) protects the motor from overheating, overload, and excessive current. It automatically disconnects the motor if unsafe conditions occur.
Purpose:
Ensures safe and reliable operation.
Protects the motor from damage.
Provides smooth switching and control.
3. Output Supply Terminals (Bottom Left)
Here, the outgoing wires connect the panel to the motor. The terminal block keeps wiring organized and easy to maintain.
Purpose:
Provides neat and secure wiring connections.
Simplifies troubleshooting and expansion.
4. VFD / Drive (Right Side)
A Control Techniques Variable Frequency Drive (VFD) is installed on the panel’s right side. This device controls the motor’s speed and direction by adjusting the frequency and voltage of the supplied power.
Functions:
Enables smooth motor starting and stopping without jerks.
Provides energy savings by matching motor speed to load demand.
Allows forward and reverse motor rotation.
Offers built-in protection against overcurrent, overvoltage, under-voltage, phase loss, and motor overload.
The VFD front panel includes:
RUN and STOP buttons,
Direction keys (FWD/REV),
Program (PRG) button for parameter settings, and
A display showing frequency (Hz), RPM, and fault codes.
5. Earthing and Safety (Bottom Portion – Green Wires)
The earthing system connects all metal parts properly to ground.
This helps prevent electrical shock, reduces electrical noise in the VFD, and protects the system from voltage surges or lightning strikes.
Purpose:
Improves safety for users and equipment.
Ensures stable operation of the drive system.
Reduces risk of accidental electric shock.
How It Works (Simplified)
Electrical power enters through the main MCB.
The supply is divided between the VFD and the control circuit.
The VFD converts the fixed supply into variable frequency power for the motor.
Contactors and overload relays ensure extra safety and control.
The terminal block sends controlled power to the motor for operation.
Common Applications
VFD panels are widely used in:
Water pumps and blowers
Conveyor systems
Mixers and agitators
HVAC fans
Industrial machinery
