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  • FIRST POST
    • gilbutre
    • By gilbutre 14th Jul 17, 10:09 AM
    • 355Posts
    • 61Thanks
    gilbutre
    Do I really need this enormous 110V transformer for a Makita SDS drill?
    • #1
    • 14th Jul 17, 10:09 AM
    Do I really need this enormous 110V transformer for a Makita SDS drill? 14th Jul 17 at 10:09 AM
    I have hired a medium corded Makita SDS (rotary hammer) drill and in order to plug it into wall power plug I was given this enormous and super heavy 110V transformer:



    To me it's almost like using a nuclear core to power an electric toothbrush. Why something so big for a simple drill?
Page 1
    • Kiran
    • By Kiran 14th Jul 17, 10:14 AM
    • 1,117 Posts
    • 494 Thanks
    Kiran
    • #2
    • 14th Jul 17, 10:14 AM
    • #2
    • 14th Jul 17, 10:14 AM
    Why have you hired a 110v if you need 240?


    They do come lightweight but it's down to whatever the hire company has.






    https://www.sitebox.ltd.uk/defender-power-pod-33kva-transformer-code-e205100-oBPT_E205100?paid=googlepaidproducts&gclid=CjwKCAj w16HLBRBFEiwAElREqDam25DKf-4hvtJZPv7Reu_XvIKOCxA9ojQ1vKKAm7lXhc6QS6iV4RoC_IMQ AvD_BwE
    Some people don't exaggerate........... They just remember big!
    • gilbutre
    • By gilbutre 14th Jul 17, 10:25 AM
    • 355 Posts
    • 61 Thanks
    gilbutre
    • #3
    • 14th Jul 17, 10:25 AM
    • #3
    • 14th Jul 17, 10:25 AM
    I'm completely useless in electricity stuff, I'm also not from the UK. This transformer won't do if I plug it in my house? But why did they provide that thing then?
    • EssexExile
    • By EssexExile 14th Jul 17, 10:31 AM
    • 2,327 Posts
    • 1,550 Thanks
    EssexExile
    • #4
    • 14th Jul 17, 10:31 AM
    • #4
    • 14th Jul 17, 10:31 AM
    If you have a 110v drill then yes you need the transformer. They are normally used on building sites where being big, heavy, tough & yellow are good things.
    Tall, dark & handsome. Well two out of three ain't bad.
    • Strider590
    • By Strider590 14th Jul 17, 10:33 AM
    • 11,523 Posts
    • 6,448 Thanks
    Strider590
    • #5
    • 14th Jul 17, 10:33 AM
    • #5
    • 14th Jul 17, 10:33 AM
    Why do people need a power station to charge an electric vehicle? Surely a USB power bank would do?
    “I may not agree with you, but I will defend to the death your right to make an a** of yourself.”

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    • Alex1983
    • By Alex1983 14th Jul 17, 10:33 AM
    • 433 Posts
    • 234 Thanks
    Alex1983
    • #6
    • 14th Jul 17, 10:33 AM
    • #6
    • 14th Jul 17, 10:33 AM
    The transformer converters the drills 110v to our 240v. Plug the transformer in to the wall and the drill into the transformer.

    They supply 110v because building sites don't allow 240v tools and that who they probably hire most of there kit out too.
    • baldelectrician
    • By baldelectrician 14th Jul 17, 10:38 AM
    • 2,112 Posts
    • 1,307 Thanks
    baldelectrician
    • #7
    • 14th Jul 17, 10:38 AM
    • #7
    • 14th Jul 17, 10:38 AM
    The power tools supply 110V for safety, which comprises of +55V and -55V on each wire.
    The 110V is between the L and N connections on the output but the voltage to earth is restricted at 55V, which makes it safer


    As it is a hire tool these are usually used on sites which require 110V power.
    baldly going on...
    • Risteard
    • By Risteard 14th Jul 17, 10:56 AM
    • 629 Posts
    • 204 Thanks
    Risteard
    • #8
    • 14th Jul 17, 10:56 AM
    • #8
    • 14th Jul 17, 10:56 AM
    Actually baldelectrician there is no neutral on the secondary in a reduced low voltage (RLV) system. The centre tap is earthed and there are two phases 180 degrees apart. The single phase variant thereby produces 55V to Earth on either phase and 110V between phases. The three-phase variant has 63.5V to Earth on each phase and 110V between any two phases.

    This should give a touch voltage in the event of a fault of only about 30V.

    And to whoever claimed that it converts the 110V from the tool to 240V that is wrong. The nominal voltage is 230V (not 240V) and this is transformed down to 110V and not the other way around. Also any extension leads should be on the secondary and never on the primary side.
    • gilbutre
    • By gilbutre 14th Jul 17, 2:04 PM
    • 355 Posts
    • 61 Thanks
    gilbutre
    • #9
    • 14th Jul 17, 2:04 PM
    • #9
    • 14th Jul 17, 2:04 PM
    Why do people need a power station to charge an electric vehicle? Surely a USB power bank would do?
    Originally posted by Strider590
    What a stupid comment...
    • onomatopoeia99
    • By onomatopoeia99 14th Jul 17, 4:00 PM
    • 3,325 Posts
    • 7,347 Thanks
    onomatopoeia99
    The nominal voltage is 230V (not 240V)
    Originally posted by Risteard
    The nominal voltage is a fudge for pointless EU harmonization (it is actually stated as 230V +10%/-6% so both 240V here and 220V on the continent are within the nominal range)

    In practice, UK mains voltage is usually 240V. We had a monitor running in a server room at an old workplace and it occasionally dropped to 236V for a while then came back, but we never saw lower than that over the course of about three months.
    INTP, nerd, libertarian and scifi geek.
    Home is where my books are.
    • Credit-Crunched
    • By Credit-Crunched 14th Jul 17, 4:19 PM
    • 2,072 Posts
    • 4,072 Thanks
    Credit-Crunched
    If it is for work around the domestic house I would take it back and ask for a 240 drill.

    Or if you can't be ars*ed just use what you have!
    • Gloomendoom
    • By Gloomendoom 14th Jul 17, 6:32 PM
    • 12,695 Posts
    • 16,889 Thanks
    Gloomendoom
    In practice, UK mains voltage is usually 240V. We had a monitor running in a server room at an old workplace and it occasionally dropped to 236V for a while then came back, but we never saw lower than that over the course of about three months.
    Originally posted by onomatopoeia99
    The sockets in my house range from 252V down to 240V at peak load times.

    I think things must be different in Ireland.
    Advice; it rhymes with mice. Advise; it rhymes with wise.
    • brightontraveller
    • By brightontraveller 14th Jul 17, 11:53 PM
    • 1,300 Posts
    • 498 Thanks
    brightontraveller
    I have hired a medium corded Makita SDS (rotary hammer) drill and in order to plug it into wall power plug I was given this enormous and super heavy 110V transformer:
    To me it's almost like using a nuclear core to power an electric toothbrush. Why something so big for a simple drill?
    Originally posted by gilbutre
    You'd whinge more using a lightweight alternative

    If your carrying it around then you're not using it properly ? To provide power, prolonged use cheaply etc means they are heavy the alternatives are not cost effective for business...
    Last edited by brightontraveller; 15-07-2017 at 1:00 AM.
    • Ectophile
    • By Ectophile 15th Jul 17, 9:46 PM
    • 2,700 Posts
    • 1,647 Thanks
    Ectophile
    To answer the original question, it's most likely that you've been given that massive great transformer because that's what they had in stock at the time.

    It's rated at 1600W continuous loading and 3300W for intermittent use. That's way over-sized for a single electric drill.

    A much smaller transformer would have done the job.
    If it sticks, force it.
    If it breaks, well it wasn't working right anyway.
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