Technical notes:
| Technical information relating to the chassis mounting toroidal transformers. |
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Colour code:0-230v Blue Brown 0-120v White-Black 1st Secondary Black-Red 2nd Secondary Orange-Yellow |
Other notes & termsPower ratingVA = WattsTo calculate VA is Volts x amps = VA Current = amps VA / Volts=Amps HP to Watts Horsepower to Watts 746 watts equals 1 horsepower. DC AC to DC multiply ac voltage by 1.41 and current by 1.7 Dc volts to ac volts dcv x .71 T.P.V Turns per volt The number of turns required giving one volt. Turns / volts = tpv Temperature All our transformers are designed to run at a max of 60degC above ambient. Frequency The mains frequency in the ECC is 50hertz and in the USA 60hertz all our transformers are designed for 50/60hertz. We can design for higher frequency up to 400htz (this will make the transformer small. With higher frequency transformers wire remains unchanged but core and turns may be significantly smaller (150hz will be one third the size and number of turns) We cannot step the frequency up or down. This requires a signal generator and amplifier. Almost all-electronic equipment is suitable for 47 to 63htz Regulation This is the power lost (heat) in the normal operation of the transformer. A regulation of 6% means the transformer is 94% efficient *Manufactured to Class B 130degC *RoHS Compliant Class Max Temperature Max Temp Rise A 105°C 65°C E 120°C 80°C B 130°C 90°C F 155°C 115°C Losses Transformer losses do not exceed 2.5watts per kilo (core weight X 2.4) / input voltage Inrush current Generally toroidal transformers have a higher switch on surge current which could trip a miniature circuit breaker (MCB), in normal operation. Type 4 or motor rated MCB’s should be used in such situations Inrush current could be more than 50amp for a few micro seconds. A surge limiter could be provided these are about a £1 each Copper Wire Enameled copper wire Enameled copper wire Polyester/Imides Grade 2 180degC thermal Class H BS6811: 3.3 & Sold able Grade 2 155degC Class F BS6811: 3.9 Testing All our transformers are 100% tested. Airlink record stands for itself with a 0% in-field failure rate and a 0.02% in-house failure at final 100% test. Airlink transformers are reliable, safe and manufactured to the highest of standards. HI_POT 3000VRMS between primary and secondary Notes relating to transformersStandardsThis transformer box will be manufactured to BS EN 61558 which is entitled 'Safety of power transformers, power supply units and similar” It is the specification most commonly called for these days and the intention seems to be that it replaces older specifications such as BS EN 60742 BS3535 and UL1411 We can however issue a certificate of conformity to all these standards Airlink holds UL certification for UL6500 UL60065 file number E250241 & UL1411 file number E188896-1 UL6500 is the latest update and will replace UL1411 the main difference being the humidity test with UL6500 requires a 3850vdc flash test for 60seconds after being in a humidity chamber at 30degC 95% for 48hours This category covers audio amplifier assemblies, audio equipment chassis, cable-converter and microwave communication equipment chassis, card-cage assemblies, mixer assemblies, power-supply chassis, preamplifier assemblies, radio chassis, television chassis, video recorder chassis, and similar components intended for use in Audio/Video Apparatus BS EN 61046 is entitled ' Specification for DC or AC supplied electronic step-down converters for filament lamps”. This specification may be applicable to the complete equipment but I don’t think it can be applied to just the transformer. The testing of the transformer should be determined by reference to BS EN 61558. Transformers are regarded as a component and as such are considered to be EMC benign. There will be a requirement for RFI testing of the complete dimmer rack and the complete equipment should carry the CE mark. I think it is misleading to CE mark the individual components. Flammability The lowest spec is UL94HB. HB stands for horizontal burn this allows for some burning and is the lowest possible rating. UL94V-0 requires some level of self-extinguishing properties (V stands for Vertical burn) The potting compound PC5449 is rated at UL94V-0 The Nylon66 pillars is rated at UL94V-2 |
| Crimping Molex KK Range 3.96mm(.156") Pitch 2way to 5way available from stock Amp Mate-N-Lok Universal power coupling and power to board connectors 6.35mm (o.25") pitch. Push to reset Circuit Breakers Available from 6amp to 45amps (connected through Brown live). |
| Toroidal transformer color code 0-240v Blue-Brown 0-120v white-black 0-115v blue-Grey 0-115v brown-violet |
