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---
- GuiCommand:
Name:FEM ConstraintElectrostaticPotential
MenuLocation: Model → Electrostatic Constraints → Constraint Electrostatic Potential
Workbenches:[FEM](FEM_Workbench.md)
SeeAlso:[FEM capacitance example](FEM_Example_Capacitance_Two_Balls.md), [FEM tutorial](FEM_tutorial.md)
---
Creates a FEM constraint for the electrostatic potential. To be used together with the Electrostatic or Electricforce equation.
#* Either press the 
FEM ConstraintElectrostaticPotential button
#* Or use the menu Model → Electrostatic Constraints → Constraint electrostatic potential.
- In the 3D view select the object the constraint should be applied to.
- Press the Add button.
The dialog offers the following settings:
- Potential: The electric potential in V.
- Potential Constant: Option to set a constant potential.
- Farfield / Electric infinity: Option to make spherical approximation that the volume above the face extends to infinity.
- Calculate Electric Force: Option to trigger the calculation of the electric for using the Electricforce equation.
- Capacity Body:: Counter of the body (or face) with a capacitance.
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