COFI Transformer type TC2

ELECTRONIC IGNITION TRANSFORMERS Types TC....A. TC….S. TD….A. TD….S. DESCRIPTION This range of electronic ignition transformers is characterized by extremely limited overall dimensions and is particularly suitable to equip forced draught burners for gas and light or heavy oil, for civil and industrial applications. The TC..S. and TD..S. models are particularly suitable to equip water cleaners. The TD… models have reduced overall dimensions and therefore they are useful to equip applications with little room available. The working principle is due to the generation of high frequency voltage by means of an electronic oscillator; the resulting voltage is then increased by using a winding with ferrite nucleus. In this way it is possible to reach output voltage values up to 15 KV. All types can be supplied with filter to minimize the emission of electromagnetic interference. In this way this series of electronic transformers is in compliance with the directive 89/336/EEC without the use of external filters. The transformers of this series are suitable for intermittent operation, i.e. 50% duty cycle (TC..A. and TD..A.), or for permanent operation (TC..S. and TD..S.). FEATURES Followings are the main features of this range of transformers: − available with inbuilt anti-emission filter; − limited weight and overall dimensions; − high efficiency and ignition power; − low consumption; − single pole or dual pole high voltage output; − different fixing and connecting systems. TECHNICAL DATA TC1...A - TD1…A TC1..AF – TD1..AF TC2...A – TD2…A TC2..AF – TD2..AF Number of poles 1 1 2 2 Output peak voltage KV (1) 15 15 2x10 2x10 Output effective voltage KV (1) 9 9 2x5 2x5 Output peak current mA (2) 45 45 55 55 Output effective current mA (2) 25 25 30 30 Output voltage frequency kHz (1) 6 6 6 6 Output voltage frequency kHz (2) 10 10 10 10 Inbuilt filter • • Consumption VA (3) 45 45 55 55 TC1...S - TD1…S TC1..SF – TD1..SF TC2...S – TD2…S TC2..SF – TD2..SF Number of poles 1 1 2 2 Output peak voltage KV (1) 15 15 2x10 2x10 Output effective voltage KV (1) 9 9 2x5 2x5 Output peak current mA (2) 45 45 55 55 Output effective current mA (2) 15 15 18 18 Output voltage frequency kHz (1) 6 6 8,5 8,5 Output voltage frequency kHz (2) 10 10 12 12 Inbuilt filter • • Consumption VA (3) 25 25 30 30 (1) Open-circuit secondary with 30pF charge. (2) Short-circuit secondary. (3) 10mm discharge distance. - Supply voltage: 220/240V-50/60Hz Versions with inbuilt anti-emission filter: on request: 110/120V-50/60Hz - Operating cycle: (TC..A. – TD..A.) 50% in 2 minutes TX X X X X X F (TC..S. – TD..S.) 100%       - Operating temperature range: -10°C +60°C      → A: 50% duty cycle - Recommended distance between      S: 100% duty cycle the electrodes: 3÷5 mm      - Max. ignition cable length: 1.5 m     → C: output with cable (Fig.1-2-4) - Standard supply cable length: 560 mm     P: output with outlet (Fig.3-5) - Weight: about 370 g        → V: screw fixing system (Fig.7) CONSTRUCTION    T: fixing system with terminal ∅ 4 (Fig.7) The working principle based on the use of a high frequency    electronic oscillator has allowed to realize a device with limited dimensions and weight, but with high ignition power.   → L: lateral isolators The electronic circuit and the transformer with ferrite nucleus   S: bottom isolators are bathed in a special kind of resin with good thermal  ↓ conductivity and a specific coefficient of expansion, which  1: single pole grants high resistance to temperature variations and to the  2: dual pole overload due to protracted working. ↓ An inbuilt varistor protects the appliance from possible voltage C, D: box type (Fig.1÷5) transients in the electric network. The transformers of this series are available in different For instance, the denomination TC2LVPAF indicates that this executions as regards the number of poles, the position of the type of transformer is provided with two lateral isolators, isolators, the type of connection and output and the presence screw fixing system, output with outlet and anti-emission filter. of anti-emission filter; on this subject, see the following schemes: OVERALL DIMENSIONS Fig.1-2-3-4-5 show the main overall dimensions of these standard versions: transformers. To fix the TC.. models transformers (Fig.1-2) screws type T X X X X X X → A: 50% duty cycle M4x40 or M5x40 must be used; the oval fixing holes permit a      S: 100% duty cycle variation of the wheel base between 57 mm and 64 mm. To      fix the TD.. models transformers (Fig.3-4-5) screws type     → C: output with cable (Fig.1-2-4) M3x40 or M4x40 must be used.     P: output with outlet (Fig.3-5)        → V: screw fixing system (Fig.7)    T: fixing system with terminal ∅ 4 (Fig.7)      → L: lateral isolators   S: bottom isolators  ↓  1: single pole  2: dual pole ↓ C, D: box type (Fig.1÷5)  TD2L Fig. 3 Fig. 1 TD1L Fig.4 TD2S Fig. 5 CONNECTION This range of ignition transformers has been designed in order to be used with control boxes of our own production, which can be mounted on the ignition devices by means of fixing screws type M4x45, as shown in Fig.6. Fig.2  ANTI-EMISSION FILTER With particular reference to the use of ignition transformers on oil or gas burners, you will find here below some remarks about the application of these devices, resulting from the research carried out by the Brahma Testing Laboratory. This Laboratory, in compliance with EN55014 and with CISPR 16- 1, is adequately equipped for the measuring of electromagnetic interference on boilers, burners, warm air generators and heating systems in general. According to the directive 89/336/EEC, the above mentioned products are subjected to the measuring of conducted electromagnetic interference in the power network, irradiated by the supply cable; the measuring is carried out on the basis of a frequency range from 150KHz to 30MHz in case of conducted interference, and from 30 to 300MHz in case of irradiated interference. Fig. 6 Electromagnetic interference is mainly due to power variations in the electric circuits (i.e. current peaks); the greater and The connection of high voltage cables can be of two types, faster these variations, the higher the interference. In this according to the terminals used inside the isolators: case, the main source of interference is the…