overhead wire de-icing · 2019. 8. 1. · blue wire is an applicationdevelopedheating...

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Product Specification: PS‐BW‐BLUE_WIRE_2019‐04

OVERHEAD WIRE DE-ICING

Permanent solutionto increase traffic regularity during “icing” weather conditions

Secure early morning exitof trains and trams out of the depot – every morning – on time

Avoid heavy ice‐build‐upto break down the wire system

Secure pantograph electrical contact after stop on all stations

Reduce cost for “night teams”to remove ice on the OHL

Extend the lifetime of all pantographs

Chemical and workforce free solution

BLUEWIRE

PERMANENT HEATING DE‐ICE SOLUTIONBLUE WIRE is an application developed heating cable solution, powered by the overhead wire system itself. A solution to increase the traffic regularity and reduce cost for expensive ice‐remover‐vechicle and teams. The system works with all overhead wire systems from 600 to 1.500 V (special system for 15kV and 25kV).

Eliminate costly interruptions of revenue service due to the effect of ice/frost accumulation on the contact wire.

Ice on the contact wire causes tramlines and light rails to lose power and in extreme cases leads to the contact wire / catenary system being brought down.

Arcing caused by the presence of ice leads to excessive wear to the pantograph conductors, all leading to traffic delays and service disruption.

Mechanical removal of ice is manpower and time consuming and mechanically stresses the contact wire.

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APPLICATIONS

In and out of tunnelsThe air inside the tunnel maintains a constant temperature and humidity. Traffic in and out and the natural ventilation force the high humidity air to meet the cold environment outside the tunnel. Ice will be created as rime on the contact wire.Water from the ceiling dripping down on the contact wire will create glaze.

On bridges crossing riversThe air above the river is normally warmer and the moisture content higher. On the bridge the warmer humid air meets the cold contact wire. Both hoarfrost and rime will accumulate on the wire.

Passing under bridgesWater dripping down from the bridge ceiling hits the cold contact wire, resulting in glaze ice.

Lines along big lakes and riversSame problems as for bridges crossing rivers.

Up hill elevated linesThe temperature normally decreases at higher altitude. This means that along the elevated line we will see a big temperature difference. The risk of having rime/white frost conditions somewhere along the line is much bigger. Ice on the contact wire reduces the power when the vehicle needs it the most.

Yards / DepotsIce on the contact wire very often accumulates during the night. The vehicles cannot move due to ice accumulation causing revenue service interruptions.

Along the line there are typical places more exposed than others regarding ice problems on the contact wire. Here is a list of typical places.

Austria: Pöstlingbergbahn, up-hill

France: Nantes, near-river-station

Norway: Bergen Bybane, Depot

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Lead wires: The heating elements consist of multiple twisted metal alloy wires.

Heater strip Insulation: Consists of an electrical high isolation silicone based material.

Steel braid: Mechanical stabilizes and protects the cable. Helps the horizontal distribution of the heat to the contact wire.

Heat transfer aid: The outer material is a special UV resistant TPE compound to ease heat transfer and keep a very high electrical insulation value.

HEATING CABLE CONSTRUCTION

The heating system is a multi-layer design. Basically it consists of an electrical insulated constant wattage heater surrounded by a heat transfer material.

The heating cable is secured to the contact wire with phosphor-bronze attachment clips to avoid galvanic corrosion. The heating cable is in a triangular shape. This makes it very easy to mount on top of the contact wire and the shape provides excellent thermal contact to the contact wire. Finally it also makes the fastening clips easy to handle and very efficient to mount.

HEATING CABLE EFFICIENCY

Infrared picture of a heating cable on top of the contact wire. The series of pictures shows how fast the wire is heated. (at minimum power)

The 3 clips that keeps the circuit on the overhead wire are visible on all pictures.

This series of pictures was taken at-5°C, wind speed 2-3 m/sec, 78% RH, Power 28 W/m.

After just 5 minutes the contact wire is above freezing temperature and ready to avoid icing of the wire.

1: 1 minute

2: 5 minutes

3: 10 minutes

4: 15 minutes

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BLUE WIRE ‐ INSTALLATION

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Heating Circuit

Contact wire

ControllerSocket or pole mount

Current return rail(Negative)

SAN Electro Heat offers a complete solution for heating the contact wire to prevent ice from building up. The system consists of:

• Heating cable and mounting clips• Circuit breakers• Controller, basic or advanced• Weather station, basic or advanced• Complete SCADA software for monitoring the

installation. By wire or wireless. The monitoring software can be delivered as a cloud solution.

The heating cable is powered from the contact wire. To control the power and operate the system, a number of controllers are needed.

Each controller is capable of controlling 1 to 4 heating circuits. Standard heating circuit is in the range 75 to 300 meter long (at 750VDC)

The controller installation also includes a manual separator to disconnect the heating circuits. This separator is normally mounted some meters above the controller on the OHL pole.

The controller switches the heating power ON when predefined weather situations occur or by direct order.

Manual disconnectors.One per heating circuitand one for the power to the controllerPole mounted

weather station

WEATHER STATION

CAT‐500‐WS‐001Weather station for pole mounting• Air temperature• RH humidity• Dew point• Cold contact wire

temperature

BLUE WIRE ‐ CONTROL BASICS

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CABLE SPECIFICATIONS

Heating cable specification is shown for a typical 600, 750 or 1500 VDC installation.

Heating CableDimension: Triangle 6.5 x 6.5 x 6.5 mmWeight/m: 85-95 g/m including 9 clips Type: Serial constant wattage cable

Power output: Nominal 36 W/m

Max. sheath temp.: 80°C without deformation.

Design circuits length of +10% and -10% will be acceptable for the performance

CONTROLLER ‐ BASIC

As basic controller +

Communication interface: Ethernet TCP/IPGSM, 3G, 4GRS-485Modbus protocol

Monitoring: Weather station dataCurrent for each circuitheating error for each circuitSystem modeSystem settings.

Web server: Yes, for easy maintenanceUSB Wi-Fi dongle or direct

Options for advanced Controller:

Advanced weather station: Air temperatureRH humidityCold contact wire temp.

Extra sensors: HumidityPrecipitation / snow

Open board: Aluminium board for build into existing cabinets

Complete: Reinforced fibre glassPole or socket mounted

CONTROLLER ‐ ADVANCED

WEATHER STATION

Two different options for a weather station to control the heat. The basic controller do not have any analog input so only thermostat is an option:

Basic controllerAir temperature: Thermostat

Advanced controllerAir temperature -50°C to +50°CHumidity: 10 – 100% RHDew point 10-99 %Cold contact wire: -50°C to +50°C

Optional extra sensor: Precipitation / snow

750 V 600 V 1500 V

36W/m meter meter meter Volt Ω

CAT‐100‐100 75 60 150 10,0 2,8

CAT‐100‐075 100 80 200 7,5 1,6

CAT‐100‐050* 150 120 300 5,0 0,7

CAT‐100‐040 190 150 375 4,0 0,4

CAT‐100‐025* 300 240 600 2,5 0,17

* Standard cable

Circuit length @V/meter Ω/meterCable type

CABINET / ENCLOSURE

Power: Std. up to 900V DCHeating circuits: 2 circuits (max. 35A)

4 circuits (max. 2x 35A)Heat ON/OFF: Auto: Thermostat, Air temp.

Manual: ON/OFFHeating circuit alarm Yes, visual, one per circuit

Options to basic controller:Outside door LED White: ON/OFF

Blue: Sum alarmSystem in operation: Mechanical key

from outside Communication: Ethernet

RS485 - ModbusWireles communication: 3G / 4G

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Operational status:• Manual or Auto operation• Control mode• Locale weather conditions• Heating circuits ON or OFF• Energy counters• Total heating hours• Heating circuit power• Current measurement for each

heating circuit

Instant message on errors:• Communication error• Mains supply failure• Low or no current in heating

circuit• Too high current in heating circuit• Temperature sensor failure• Humidity sensor failure

Remote settings:• Turn individual circuits ON/OFF• Temperature & Humidity levels

for every control mode• Diagnostic tool

BLUE WIRE – SCADA SUPERVISION SOFTWARE

Errors and operational status is reported immediately to the right person, both at the user interface, in an SMS and/or in an e-mail. Call for repair could be done with no delays. No jeopardizing the regularity of the tramline traffic.The SCADA software can be customized in multiple ways e.g. language, graphical presentation and error handling.

BLUE WIRE SCADA is the scalable software package that extends the reliability and efficiency of the contact wire heating.On-line management and control software to bond all controllers on a traffic line or in a territory together. Valuable information at the fingertip for:

• Traffic Control Department.• Maintenance Department.• Technical Department.

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SCADA AS A CLOUD SOLUTION

Complete SCADA – Access via the Internet

SAN Electro Heat offers the easy to use BLUE WIRE SCADA as a cloud solution. The solution is based on wireless GSM, 3G/4G communication technology to each controller and internet access for all users.

Safety solution: The solution is provided with a point-to-point VPN communication.

Hosted BLUE WIRE SCADA benefits:

• No need for any IT hardware investments• No need for maintaining a server application and

the communication gateways• SAN Electro Heat maintains the IT solution• SAN Electro Heat can update, modify and

implement changes very quickly.• SAN Electro Heat has the experience from other

similar hosted installations• Easy to give an external maintenance partner

access to the system.

SAN Electro Heat offers the same easy to use SCADA solution to be installed on your own server in your own secure data network.

BLUE WIRE SCADA – SERVER SOLUTION

If a secure GPRS network is already in place and/or the communication is based on a wired network (ethernet or fibre optic cables) or GSM-R, it could make sence to host the solution In-house.

https://SCADA USERS

Traffic Control DepartmentMaintenance Department.Technical Department.

WEATHER FORECAST

CLOUD SCADA

INTERNET

BLUE WIRE INSTALLATION

Maintenance

On Location Direct Access

INTERNET

GPRS3G 4G

VPN

VPN

VPN

FIR

EWALL

SQL Data base

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SAN Electro Heat a/s (Member of the NIBE group)Danish located international company. More than 60 years of experience in development and manufacturing of advanced technical electric heating solutions and components. Focus on know‐how divided into four business areas: Railway, Wind Power, Industrial Heating and Comfort Heating.

SAN Electro Heat a/s ‐ RailwayGillelejevej 30b3230 Graested, Denmark

san@san‐as.comwww.san‐as.com

SAN Electro Heat ‐ Railway (Part of NIBE Element ‐ Railway Solutions)Rail Infrastructure: Focus on complete systems to secure optimum operation under any winter weather situations e.g. switch point heating, overhead wire de‐icing, third rail de‐icing and platform de‐icing. Rolling stock: Comfort heating, door step de‐icing, heating of hydraulic systems, toilet/waste water systems and test load resistors. We supply highly efficient systems that reduce energy consumption and total cost of ownership. Our design has proven its reliability through thousands of installations all over Europe, Canada and USA.

Information in this document is subject to change without notice.©2018, by SAN Electro Heat A/S.

All rights reserved.

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ACCESORIES

Power resistors CAT-400-DL-xIf the heating circuit is shorter than the specified standard length, a power resistor will be mounted at the end of the cable to substitute the missing cable (resistance value). The load resistor is weather resistant and could normally be mounted high on the pole.

Ice accregation can be categorized in 4 different main types of ice:

Hoarfrost Air humidity freezes on surfaces directly from the vapour phase if the contact wire is colder than the air temperature and below 0°C.

Rime Air humidity condensates on the contact wire when the air temperature is below the dew point temperature. The condensate will freeze if the contact wire is below freezing point.

Glaze / Ice rain Water droplets hits a contact wire colder than 0°C and freezes. Water droplets could be super cooled rain.

Snow Normally snow will not create ice on the contact wire, but wet snow (snow just around the freezing temperature) will react just like water droplets and will freeze to ice on a contact wire colder than 0°C.

ICE CONDITIONS

Protection shieldShield and a special rail bracket to protect the connection of the return (reference) current.

Power Termination KitsReliable termination to cold wire or hot/hot wire termination.

TURNKEY, INSTALLATION AND TRAINING

Turnkey project and/or training (certification) of local staff. SAN Electro Heat delivers from components to complete projects including design, installing, training, inspection and maintenance.

overhead wire de-icing · 2019. 8. 1. · blue wire is an applicationdevelopedheating...

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