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A power supply is an electrical device that supplies electric power to an electrical load. The main purpose of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load. As a result, power supplies are sometimes referred to as electric power converters. Some power supplies are separate standalone pieces of equipment, while others are built into the load appliances that they power. Examples of the latter include power supplies found in desktop computers and consumer electronics devices. Other functions that power supplies may perform include limiting the current drawn by the load to safe levels, shutting off the current in the event of an electrical fault, power conditioning to prevent electronic noise or voltage surges on the input from reaching the load, power-factor correction, and storing energy so it can continue to power the load in the event of a temporary interruption in the source power (uninterruptible power supply).
All power supplies have a power input connection, which receives energy in the form of electric current from a source, and one or more power output or rail connections that deliver current to the load. The source power may come from the electric power grid, such as an electrical outlet, energy storage devices such as batteries or fuel cells, generators or alternators, solar power converters, or another power supply. The input and output are usually hardwired circuit connections, though some power supplies employ wireless energy transfer to power their loads without wired connections. Some power supplies have other types of inputs and outputs as well, for functions such as external monitoring and control.

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  1. G

    Recommended power flush company in the Southend on sea area

    Hi all Can some kind soul recommend a decent power flush person in the Essex area Thanks Gary
  2. U

    Y plan motorised valve

    If a y plan system shuts down when the last function was central heating power remains on to the motorised valve and maintains the motor in a stalled condition. This means that It can remain in this state overnight . Has anyone found a solution to this situation?
    • Unregistered
    • Thread
    • condition motor motorised motorised valve power register system valve y plan
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  3. Inverness

    honey well motorised valve without a manual lever

    As anyone came across a motorised valve without the manual lever? I had one with was a honey well 28 mm the merchant said it's for back boilers and they open up when a power cut has occurred. They are hard wired in. Can someone explain there purpose and where there location is on a heating...
  4. P

    Hilti SDS drill or Bosch?

    My old 850W Bosch SDS seems to have lost some of its punch after 8 years of abuse (mainly mixing plaster!) I want to buy another drill with my scrap money (will be around £200). Drill will be a stand by and will continue to use the old one until it dies...
  5. A

    power flush on a oil fired combi

    Hi fellas, have a power flush lined up for later this week - use a Fernox machine and have done quite a few in the past but never on a combi boiler. This boiler is a Warmflow Kabin Pak system boiler with the twin head pump. I would normally attach the power flush machine to the pump valves but...
  6. L

    Power flushing

    Hi all, when you want to power flush a combi boiler and you turn the mains power of to the boiler, how do you know if the diverter valve is in central heating and not hot water? I.e. the water is being pumped through the main heat exchanger? :drool5:
  7. hammers4spanner

    System clean

    Been asked to clean a heavily sludged system out how good is the magna cleanse for cleaning out a heavy sludge system . I know power flush is the best way however its an oldie system and bit concerned if i power flush another issue may arise .
  8. D

    Salus IT500 killing pump power after hot water cycle is complete

    Hi, I have a Salus IT500 controlling my vaillant ecotec 418 open vented boiler. The hot water is heated for 2 hours and when the time is up the Salus stops the water heating cycle and leaves the boiler to cool down. The boiler shows the pump symbol for the external pump running, but the salus...
  9. AlexGas

    Power Flush...

    I use Power Flush FX2 and the crystals to clean the CH pipe work. I find that it takes ages to get the dump water clear. It took me less than 20 min to do the job by using mains cold water pushing all the dirty water out. 2-3 min per rad, job’s done. OK, it’s a bit of waste of water… What are...
  10. B

    Myson Power Extra MPE322 Problem or not?

    Hi guys I have a Potterton Boiler this heats up the radiators and the hot water. There is also an immersion heater in the airing cupboard too that we leave switched off. Our water was cold the other day and we noticed when the heating and water lights come on on the timer panel the pilot...
  11. B

    Myson Power Extra

    Hi guys, I am new here so would like to say hello All! Is there anyone that could help? At Christmas last year our boiler started playing up its a Potterton that isn't a combi. McAllen the insurance they sent a guy out who replaced the pump in the airing cupboard and then realised that the...
  12. T

    Which power shower would best replace an Osprey 11?

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  13. J

    Four CH pump failures within 10 weeks - help!

    I had a new Worcester Bosch boiler installed by British Gas at the beginning of May. All was going ok until the pump failed within two weeks (it had always behaved pretty well until then). BG replaced it. Then the replacement packed up within another two weeks and so I started wondering if there...
  14. spanner

    power flush

    I'm looking for a decent power flushing unit at a good price.. any offers??? Kamco preferred, and the decent CF90 I'm able to get brand new for £500
  15. M

    Can Power flow flux go off

    Can power flow flux go off? if so are we talking years?
  16. J

    Filling solar pipe work

    Could a power flusher for central heating be used for filling solar pipe - work??
  17. H

    Vaillant Boiler Power Boost

    Many years ago I worked for a floppy disk manufacturer and was surprised to learn that for economy of manufacturing all the magnetic disks inside the case were 1.44MB. The cheaper to buy 720KB disks had their storage capacity limited by a notch in the outer case. Both disks costs the same to...
  18. P

    Mira Power Shower Pump squeek - anyting to be done?

    Hi everyone, I have a Mira Enduro "Universal" 1.5 bar double ended pump. the wife turned on the shower this morning and nothing happened (she had a shower with no power). I am tasked with troubleshooting and have read the appropriate guide. When I tried the shower it worked fine a...
  19. hammers4spanner

    magnaclease

    Any of you guys invested in this bit of kit ? If so any good?
  20. N

    Vokera syntesi 35 small leak and now no power

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