VärmeKabelTeknik Switchpoint heating VELOX Switchpoint heating is designed for connection to 230V ac. The heating elements are of the self‐limiting type which means they are energy efficient as they decrease the heat output when the temperature rises. The elements are double‐insulated and lack protective earthing in order to avoid causing signalling faults if damaged. The elements are flexible and are mounted using clips and protective stainless steel channels 1m long.
Switchpoint heating 2 VärmeKabelTeknik Index GENERAL ...................................................................................................................... PAGE General about installation of VELOX Switchpoint heating ...........................................................2 Compontents ........................................................................................................................... 3‐4 Assembly instructions ......................................................
VärmeKabelTeknik Components Velox Switchpoint heating element Heating elements are delivered in customized lengths with fitted quick‐connect devices. The elements are tested, insulation measured with high voltage applied and marked with type. Velox installation channels Stainless‐steel channels are supplied in lengths of 1m or 0.5m and as standard channels or slotted channels, for example for clearing the point rod fastening device.
Switchpoint heating 4 VärmeKabelTeknik Components Velox protective cover To protect the 4‐way block from mechanical damage for example when power brushing rail. Cable joint Is used to connect two cables without use of shrinking tube or filling compound. The cable joint is a dry joint and very easy to use. The cable joint is provided with 2 glands PG29, IP65. max. cable diameter: depending on gland used. This joint can be used for any cable up to a max. diameter of the size a 40mm gland can take.
VärmeKabelTeknik Switchpoint heating 5 Assembly instructions Measure the length of the part of the switch which is to be heated. Find out the rail type in question. Decide if an existing control system can be used (230V to the element) or if a new one has to be bought. If a new control system must be bought, find out which functions are required, (type of control, log‐ging, remote control by telephone wire or mobile modem, etc).
Switchpoint heating 6 VärmeKabelTeknik Assembly instructions Fit the next channel tightly against the first one, and it is a good idea to make a clip cover the joint. Continue until the whole element including the connection cable joint is covered. For narrow passages flexible channels are used which can be bent to fit. Here it may also be necessary to use both types of clips to achieve the best possible contact. Repeat the procedure for the other stock‐rail and for the two moving rails.
VärmeKabelTeknik Assembly instruction The control cabinet should be mounted as close to the switch as possible to avoid high costs for supplies to the switchpoint heating elements and unnecessarily long sensor cables causing deviations in the values read off. Connections to the elements are made using 8/4 conductors in rubber with separate conductors for each element. Since the control cabinet is fed by a normal Ekki 4 / 5 x 6mm² it is more economical to choose a longer distance for the incoming supply.
Switchpoint heating 8 Communication/Supervising Control The elements are controlled by thyristors allowing both routine start and soft start. These functions help minimize the number of fuses on the feeding side. Each card contains eight channels and the card channels can be linked together. Sensors Each sensor card contains eight input ports, and each system can accommodate 30 sensor cards. They can measure current, temperature, voltage, moisture etc.
VärmeKabelTeknik Communication/Supervising/Accessories Velox Megapoint Velox MegaPoint are available in two basic types: 8‐channel Triac‐based electronical control for alternating voltage up to 400 Volt. A system for control for direct current voltage, DC, up to 650‐900 VDC. Velox Communication system – Leonardo PCBox Leonardo PC BOX is a compact PC for build‐in applications. Are fixed onto DIN‐rail. Weather system Measures temperature, wind, wind‐speed, dew point etc.
Switchpoint heating 10 VärmeKabelTeknik Communication/Supervising/Accessories GSM Antenna AU-3S-GSM High performance GPS patch antenna with state‐of‐the‐ art low noise amplifier. Low profile, waterproof, magnetic base quick mounting. WMO2 Modem Series GSM 900 / 1800 / 1900 The Wavecom WMO2 modem is a terminal for fax and data transmission, short message service mobile originated, short mes‐sage service mobile terminated and voice calls.
VärmeKabelTeknik Function tests and fault detection Checking the function of the switchpoint heating elements The switchpoint heating elements are made out of double‐insulated self‐limiting heating cable with an output power of 100W/m at +10°C ‐ 230V ac ≈ 160 – 170 W/m at –15°C. This type f heating element has a core of dipped fluorethene plastic which has the effect that its resistance increases when the temperature rises.
Switchpoint heating 12 VärmeKabelTeknik
VärmeKabelTeknik Switchpoint heating 13 Notes .................................................................................................................................................................................................... .................................................................................................................................................................................................... .....................................................................
Switchpoint heating 14 VärmeKabelTeknik Telephone: +46‐301‐418 40 – Email: info@vkts.se – Homepage: www.vkts.