# Branch

```{toctree}
:maxdepth: 2
:titlesonly:
:hidden:

branch-lumped-constant/index
```

_Source: `GridKit/Model/EMT/Component/Branch/README.md`_

## Branch Model

### Introduction

EMT branch models represent three-phase network connections between buses in instantaneous abc coordinates.

### Types

#### Lumped Parameter

Lumped transmission line models approximate the branch with finite network elements (sometimes referred to as the $\pi$-model). GridKit currently only implements constant parameter.

- `BranchLumpedConstant` (See [BranchLumpedConstant](branch-lumped-constant/index.md))
- `BranchLumpedFrequencyDependent`

#### Distributed Parameter

Distributed transmission line models preserve traveling-wave propagation and delay. GridKit cannot implement these until model internal signal delays are supported.

- `BranchDistributedConstant`
- `BranchDistributedFrequencyDependent`