---
title: "XMU - Power collection - Roof disconnectors"
canonical: "/xmu-power-collection-roof-disconnectors"
published: 2026-10-09
---

# XMU - Power collection - Roof disconnectors

## Frame

## Frame

**Rail**

**XMU**

**Power collection**

**Pantographs and Strips**

**GRU**

**Roof Disconnectors**

**Switches**

**Safety Sequence**

## Frame

### Roof disconnector OSAD44

##### Outside Roof Disconnector OSAD44

##### Roof disconnectors are needed to connect the pantograph to the circuit as well as earthing current in the case of low voltage. In case of short-circuit, the roof disconnector will disconnect the pantograph from the line to make sure the circuit is earthed.

##### Our innovative line of roof disconnectors are unique in their vertical design, allowing to take as little place as possible around the pantograph on the roof. OSAD44 is meant to be mounted outside of the vehicle.

###### POWER COLLECTION

##### Roof disconnector OSAD44

**Customer benefits**

### Roof disconnector OSAD27

###### POWER COLLECTION

##### Roof disconnector OSAD27

##### Roof Disconnector OSAD27

##### This roof disconnector is suitable for application where earthing is not needed and only disconnection must be done. It is used to disconnect pantograph or to disconnect the roof line. This is a horizontal switch.

**Customer benefits**

**OSAD44**

**OSAD27**

## Frame