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electau

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Posts posted by electau

  1. They are expensive per tube (36W) (18W) and they cannot be substituted for an existing tube. The ballast and starter have to be removed and the wiring reconnected to one end of the tube.

    Currently too expensive for the normal domestic type installation. Exit and evacuation lights are well suited to LEDs as current maintainance costs are high for normal light fittings. So are small downlights, LEDs can replace these.

  2. One has to be very careful with the misinformation concerning LED fittings and lamps when comparing them with conventional lamps.

    As with heat, lumens is lumens, there is no substitute so if you see a product with excessive savings in power consumption without creating an equivalent lumen output the only thing you are saving is the education process when you realise that the product does not perform to your expectations.

    There seems to be no minimum performance standards as yet. One should be wary of any performance guarantees, eg 50000hrs, from an unbranded product from a company that was created last year. Operating conditions. Many fittings are designed to operate in ambient temperatures of 25C, when 40C would be closer to the mark.

    So your lighting checklist, light=heat, heat =losses, lumens =lumens.

    ( Ref. Extract is part of an article from Pierlite Australia).

  3. Thai passports can be renewed/replaced at selected consulates and embassies.

    Eg: Sydney, Australia.(consulate) Now the Thai ID card may be replaced as well. One has to apply in person with the required documentation ( and fees). Passports are sent to your address by registered mail or equivilent service, the same would most likely apply to ID cards.

    Not a real problem except for the costs of travelling (and accomodation) from where you normally reside.

    One would be far better off renewing a passport and ID card when in Thailand.

    You can obtain further information from the consulate/embassy by telephone if you live in one of the designated countries.

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  4. A brownout is a prolonged period of low voltage (sag). A blown HV fuse on a 3 phase transformer will cause two phases on the LV to neutral to be normal (220V) and the third phase to fall to 155V. This phase is the one with low voltage. This is a fault condition.

    Earth faults and short circuits on the distribution network must clear in less than 5 secs in fact in a short number of cycles, but auto reclosers on the HV may re-energise after the fault is cleared, generally twice then lock out.

    Switching failures and errors cause load shedding and re-energiseation is brought on gradually in increments so as to maintain system stability. Transient faults are often seen as a short dip in voltage,

    Long HV spur lines in rural areas have auto tap changing transformers which regulate the 3 phase voltage, they may be situated 20 to 30 km apart.

    Most LV problems are within the customers electrical installation, excessive voltabe drop in mains, sub mains and final subcircuits.

    When checking for low voltage it should be carried out at the main switchboard on no- load and then on load in increments.

    The PEA has a voltage regulation requirement under TIS for +/-10% of nominal 220V. For the MEA it is +/- 7% in Bangkok.

     

  5. Generally the circuit is run from the switchboard to a switch adjacent to the compressor unit and a multi core cable is run from the compressor ( terminal block) to the fan coil unit.

    The switch should be IP56 rated ( weatherproof). For a 3.0kW input power unit, cable size 2.5sq mm, 20A MCB or RCBO.

  6. Cable rating of a cable depends on the method of installation, individual single circuit, bunched( over 50% of the route length), in free air, in conduit, underground, unenclosed and enclosed in conduit ot duct.

    It is required to derate cables under certain circumstances, eg when enclosed in thermal insulation( over 50% of route length).

    Derating may apply to very long circuit runs to comply with impedance requirements under fault conditions.

    For domestic installations, single circuit rating to IEC/AS/BS requirements is all that is required.

  7. If you have an average 8.5km/sec wind speed over a 12 month period, an axial wind generator should be considered.

    One problem is they have to be mounted somewhere around 30meters from ground level, and this can be a practical problem.

    However it is possible to obtain power providing there is enough wind velocity 24/7. Again they are expensive.

  8. Austereo, the owner and operator of station appear to have breached the code of conduct and the law.

    First, they prerecorded the transmission which was an impersonation of HM. It was done for the purpose of illegally obtaining imformation on a particular patient, who are entitled to privacy.

    They did not obtain permission to play the tape publicly after recording the nurses reply (which is required under Australian law).

    This is the third time Austereo has breached ACMA code of conduct.

    Practical jokes, and so called pranks should only be played on persons you know personally and you must be reponsible for your actions. They should never be carried out on persons in a foreign country.

    In Austereos case the result may have indirectly caused the death of an innocent person, in this case a nurse.

  9. When my wife applied for a 309 visa in 2007 it was done with the minimal documentation but it met the criteria for the visa, letter from sponsor and applicant, IMTs, telephone accounts, no emails and 24 photographs and I had been married for 6 months and had known my wife for one year before marrying. Supplied evidence of 3 trips to Thailand up to the time of application.

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