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Rittal Pano Isıtıcıları



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Rittal Pano Isıtıcıları Rittal Pano Isıtıcıları Document Transcript

  • 162
  • Heaters Particularly with fluctuating ambient temperatures, such as those that occur with outdoor enclosure siting or in unheated rooms, enclosure heaters must be used to prevent condensation. All Rittal enclosure heaters operate on the basis of state-of-the-art PTC technology. Heaters Benefits, technical details 164 Continuous thermal output 10 – 300 W 166 Heaters Practical example of heaters dew point – hot air is capable of absorbing more humidity – thus helping to counteract Extreme temperature fluctuations provide condensation on electronic components. the ideal conditions for the formation of In particular, heaters with an integral or 2 condensation. Particularly when enclosures additional fan offer even greater efficiency. are sited outdoors, it is essential for the built-in electronics to function reliably. Enclosure heaters may be easily snap- 1 mounted onto the 35 mm DIN EN 50 022 In order to maintain operational reliability, support rail, for example, or screw-fas- enclosure heaters are used. tened onto the mounting plate. Where there is a risk of frost, the heater The heaters are easily controlled using a keeps the temperature level inside the thermostat and/or hygrostat. 1 Heater enclosure at the operating temperature of 2 Electronic the built-in electronic components. If there components is a risk of condensation, the enclosure internal temperature is raised to above the 163
  • Heaters Benefits, technical details Especially with outdoor siting, but also indoors, condensation poses a particular risk for control electronics. 7 different output categories ensure that the correct thermal output is always available. In this way, the total thermal output required can be distributed precisely within an enclosure, thereby effectively avoiding the overheating of individual components. Output and application diversity The output range of the three different Rittal enclosure heater systems, from 10 to 1,000 watts, ensures a high level of heating effectiveness in a confined space. The designs without fan and with fan (thermal output from 50 to 160 m3/h) provide a solu- tion for every specific applica- tion. Particularly in outdoor use, condensation poses a high risk. This may be counteracted by a regulated heater coordi- nated to the enclosure size and temperature difference. Simple assembly and reliable control Fast assembly No condensation, and always This is achieved with a screw the right temperature or snap fastening on the The heater is activated as mounting plate or 35 mm required via the hygrostat or DIN EN 50 022 support rails. enclosure internal thermostat. 164 Rittal system climate control
  • The benefits of modern thermistor technology (PTC) The prerequisite for optimum Rittal heaters with ● A constant thermal output conversion of electrical energy PTC technology throughout a broad voltage into thermal energy is perfect Unlike conventional resistance range (e.g. 110 to 240 V interaction between the thermal heaters, in thermistors (PTCs), AC/DC). output, surface temperature power consumption automati- ● Special voltages are pos- and ambient temperature. cally decreases as the intrinsic sible in the low voltage range temperature rises. The advan- (e.g. 12 V, 24 V) Benefits: Conventional resistor heaters tages of this dynamic output ● Long service life The surface temperature is limi- ● Useful cooling output behaviour are as follows: ● Compact, vibration-free ted via an additional safety from 10 to 1000 watts mechanical structure thermostat. As a result, the ● Surface temperature is limi- ● In the event of a malfunc- ● Self-regulating PTC tech- heater is forever cutting in and ted without the need for tion, there is no risk of fire nology out, which means that the con- additional temperature pro- Heaters from incandescent elements tinuous thermal output actually tection devices ● Quick-assembly system produced is low. ● Self-regulation achieves direct adaptation to the ambient temperature. In Important other words, as the enclo- sure internal temperature ● For the correct tempera- falls, the thermal output ture and to avoid conden- increases (cf. performance sation, use a thermostat diagrams). or hygrostat – cf. page 175 ● Heaters should always be installed in an upright position. Leave a dis- 170°C tance of 50 mm at the top 160°C and bottom to allow con- 150°C vection 140°C 1 ● The thermal output is 130°C increased with fans 120°C 110°C ● Heat is distributed evenly 100°C in large enclosures by using several low-output 90°C heaters 80°C 70°C For general comments, 60°C 2 see page 186 50°C Calculation formulae, see page 187 40°C or refer to the Internet at 30°C www.rittal.de Temperature variation through the aluminium section (Tu = 20°C) using the example of the heater SK 3102.000 1 = Temperature variation without fan 2 = Temperature variation with fan Rittal system climate control 165
  • Technical specifications: SK 3105.000 SK 3106.000 SK 3107.000 ● Limitation of surface temperature via a 35 45 100 80 8 PTC thermal element. 11 ● If an axial fan (SK 3108.000) is attached to the heater SK 3107.000, its effective- 35 45 8.25 ness may be enhanced. 125 ● All heaters are quickly and easily 130 140 75 5.2 mounted using the supplied screw and 25 80 162 snap fastenings. ● Snap fastening for 35 mm support rail DIN EN 50 022. ● Maximum effectiveness is achieved by installing the enclosure heaters vertically, with the cable routing pointing down- wards. ● In order to create the necessary convec- SK 3115.000 SK 3116.000 SK 3102.000 tion, 50 mm spacing from the top and 64 including fan bottom is required. The distance from 45 neighbouring components must be at 0 12 least 50 mm. □ ● The unit housings are made from robust, 64 45 black anodised aluminium. 185 Supply includes: Unit ready to install with permanently 110 attached connection cable (0.3 m). 168 SK 3102.000 with fitted fan including terminal strip. Note: ● Thermostat SK 3110.000 (see accesso- ries) is recommended for precise tem- perature control in the enclosure. ● In order to prevent condensation on assemblies, hygrostat SK 3118.000 (see accessories) is recommended to regulate heating. ● In larger enclosures, even heat distribu- tion is best achieved by installing sev- eral low-output heaters. ● Internal installation is generally advis- able, even when using heat exchangers and cooling units, in order to prevent condensation. 3107.000 + 3102.000 Model No. SK 3105.000 3106.000 3115.000 3116.000 3107.000 3108.000 (incl. fan) 110 – 240 V Rated operating voltage V, Hz 110 – 240 V AC/DC 230 V, 50/60 AC/DC Continuous thermal output at Tu = 20°C 10 W 20 W 30 W 50 W 130 W 200 W1) 300 W1) Pre-fuse T 2A 4A Special voltages available on request. We reserve the right to make technical modifications. 1) Output with fan. Accessories Packs of Page Thermostat 1 3110.000 175 Hygrostat 1 3118.000 175 Temperature indicator 1 3114.100 174 Axial fan Model No. SK 3108.000 for heater SK 3107.000 Ball bearing 79.5 38 Temperature range: –40°C/+85°C 71.5 3 3 Rated operating voltage: 230 V, 50/60 Hz Power consumption: 18 W Noise level: 33 dB (A) 71.5 79.5 Speed: 2800/3300 rpm Air throughput: 50 m3/h 310 4.3 Earthing lug 6 for M4 or 8 – 32 UNC 166 Rittal system climate control
  • Enclosure heaters Continuous thermal output 10 – 300 W Enclosure heaters Performance diagrams Model No. SK 3105.000 / 3106.000 / 3115.000 / 3116.000 3102.000 / 3107.000 65 SK 3 60 116.0 00 350 55 1 50 S K3 Approvals, 300 45 40 SK 115 .00 see page 23. 0 W 31 W 250 35 06 2 .00 30 0 25 200 3 20 15 SK 3105.000 150 4 10 5 100 – 20 – 10 0 + 10 + 20 + 30 – 30 – 20 – 10 0 + 10 + 20 + 30 °C °C 1 = SK 3102.000 (with fan SK 3108.000) 2 = SK 3107.000 (with fan) 3 = SK 3102.000 (without fan) 4 = SK 3107.000 (without fan) Functional diagram With this heater, an axial fan supports heat distribution inside the enclosure. Rittal system climate control 167