Is there a 2400 volt transformer?

Answer 1

Relays which operate on 220 to 240 Volts are available. There are many different types, from miniature ones made for use in electronic equipment and printed circuit boards, to large ones made for use in electrical appliances and industrial equipment.

When you describe a relay you must define several things: its operating voltage; the number of switch-poles that it has; the current-carrying capacity of its contacts when switching either direct or alternating current; the method of connecting it into a circuit - solder posts for wiring or for printed circuits; spade terminals or a "relay plug base" - and finally the type of working environment in which it is to be used.

Relays made for use in dry "instrument case" conditions are built differently from relays which are made for use in damp conditions such as household washing machines or dishwashers. Relays are also specially made to withstand the wet and dirty conditions found in factories, coal mines or on board ship.

Relays having contacts capable of carrying and switching currents in excess of 25 Amps are called "contactors".

Answer 2

What exactly is this question asking? If it is asking if 220 - 240 volt relays are available, the answer is yes.

If this question is asking if flasher relays for use on 220 - 240 volt supplies are available, the answer is also yes. There are several makes available from stores selling disco equipment or specialist electronics gadgets and parts. Some of them use microprocessors to give a full range of time settings.

If this question is asking how to use such a relay to make a 220 - 240 volt light bulb flash as a D-I-Y job, please read the following note very carefully: What follows below is written in good faith on the assumption that the work involved will be done only by someone who, when working on or with household electric power circuits, fully understands the necessary care and safety precautions which must be taken to avoid anyone being put at risk of electrocution either when building or testing the equipment or by anyone who subsequently uses it.

It may seem logical to ask how to connect a 220 - 240 volt supply to the relay in such a way that one pair of contacts makes and breaks the supply to the light and the other pair of contacts makes and breaks the supply to the relay's operating coil. But this is not a safe thing to do - so don't even think of doing it that way - because it makes the relay work like an electric buzzer. That is VERY BAD PRACTICE for at least three reasons:

i) the contact's sparking will send out very serious "radio interference", both into the neighborhood's electric power wiring and into the surrounding air;

ii) the relay's contacts will spark so badly it will cause them to burn out very quickly;

iii) the bulb will never look like a normal flashing light, going on and off like a car's flashers. It will just look like a half-lit bulb.

Unless you are already a person who has been trained and has practical experience of how to design and build electronic circuits from scratch - in which case you would surely not be asking this question here - the only safe way to make a safe and effective "flasher unit for a 220 - 240 volt light bulb" is to use a low voltage flasher unit, such as a 12 volt blinker/flasher unit for a car, to power a relay which has a 12 Volt operating coil and contacts "rated" to carry 220 - 240 volts at an appropriate current.

If it is a 100 watt bulb then its running current will be about half an amp, but, because a conventional incandescent filament light bulb takes much more current to start up, the contacts should be rated to carry at least 5 amps at 220 - 240 volts.

The flasher unit could include a 12 volt power supply, of the type used to power-up a portable television, plugged into a normal household power outlet to feed the 12 volt car blinker/flasher unit instead of having to use a 12 volt battery. If the light bulb was the same voltage as the power outlet, that same outlet could also be used to feed power to the relay's contacts to feed the light.

<><><>

As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.