EARTHING SWITCH “Innovation for sustainable railway”

LOGÍSTICA Y TELECOMUNICACIÓN S.L.

C/Varsovia, 6 Alcalá de Henares, 28805 Madrid (Spain)

Tel.: +34 918 87 12 60 Fax: +34 918 83 10 11

www.logytel.com

This equipment enable the remote earthing, allowing to improve the MTBF

(Mean Time Between Failures) with the guarantee of the earthing provided

and supervision.

Based on a request realize from Remote Control Center of Energy or CCO,

the equipment verifies whether the conditions for carrying out the earthing

and if the self-monitoring that is carried out is correct.

The earthing switch performs the connection of rail to the catenary and

thereafter to ground or to guard wire by means of an auxiliary contact.

Proper connection can be monitored with measurement of insulation from

the power substation. This system is specially designed for areas most

critical to security such as workshops, tunnels washing , etc.

The reestablishment can be effected in the same way, ensuring its position

although the replenishment of energy is monitored.

The main functions are:

• Monitoring of the union between the rail and the earthing

switch by means double connection.

• Communications with the Control Center for monitoring and

control.

• Measuring the voltage of catenary by means double

connection

• Monitoring switch position through an angular optical fiber

sensor.

The system as such is NOT a substitute to existing operating procedures

regarding grounding of power lines, is only intended as a support system

for the purpose of implementing this function, in order to minimize the

time for action, not constituting therefore sufficient reason to think about

the cancellation of the above procedures, but on the contrary, the support

in the same is needed to ensure the same safety in operations.

The system consists of the following elements:

Motor Drive System

It is the responsible of maneuver

the earthing switch, transmitting

the movement through the

rigging, also delivered through

the limit switch their position to

the controller.

It incorporates mechanical

locking articulated arm.

Motor controller and voltage comparator

CPU

Performs the control of the

entire system, obtains all the

information from the equipment

delivering it to the local

operating equipment for

monitoring, both manages and

evaluates the manoeuvres from

the local operating equipment.

It incorporates all the logic of

protection, self-monitoring and

blocking.

Analog inputs.

Angle gauge connection.

Recording data

Standard protocol for

communication

Simple addressing and unique

identification by means of serial

number unique.

EARTHING SWITCH “Innovation for sustainable railway”

LOGÍSTICA Y TELECOMUNICACIÓN S.L.

C/Varsovia, 6 Alcalá de Henares, 28805 Madrid (Spain)

Tel.: +34 918 87 12 60 Fax: +34 918 83 10 11

www.logytel.com

Transceiver power and Entrances

Provides the power to the

Transceiver of the angular

sensor and to the digital inputs

of the controller.

Voltage sensor

Realize the measure of the

catenary voltage and sends it via

4-20 mA current loop to the

controller-comparator voltage

for evaluation.

Earthing switch

SAC disconnector normalized standard of 3,150 A at 3.3 kVDC.

Additionally provides:

• Kit blade for grounding.

• Optical sensor angle in the blade (Isolator break monitoring).

Angular Sensor by F.O.

This sensor detects the position

of the mobile paddle of the

disconnector, is based on optical

fiber technology to give a level

of reflected power as a function

of angular movement of the

disconnector.