variable

variable

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  1. _q12x_

    Variable Wattage Box

    Hi everyone, I want to make a variable Wattage box. Mainly for testing purposes. I want some small scale, medium and if possible, some big scale variable wattage ranges. Lets start with something easy, the small scale. From the back of my mind, I would use a small npn tr like BC548 or BD681 to...
  2. P

    Bizarre variable IR problem at 250V

    Recently changed a CU for a friend and today when visiting one of the RFC's RCBOs tripped. It was due attention anyway as open ring and no time to solve it last week, but due to the trip I checked the IR again and found it was different. Last time around a stable 15M on 250V with stuff attached...
  3. Poolworx

    Is this how a variable speed motor works

    Just wondering if my drawing is correct for speed control of a variable speed motor and what the actual switch is card thanks
  4. T

    installing/testing variable speed draft fan control switch

    hello there, i have Jensen 24a wood furnace and it needs a new switch. the manual calls it the "rheostat", but it's like any other variable speed controller with two wires. I bought two inexpensive ones off ebay only to find they are labeled as dimmer switches though they were advertised for...
  5. D

    How does variable electricity tariff work

    This might sound like a stupid question but if someone was on a variable electricity tariff and they didn't have a smart meter, and let's say the electricity was cheaper at night between 6pm to 11pm. How would the electricity provider know how much electricity you used at night so they could...
  6. R

    Variable fan speed controller

    Evening all, I have recently fitted a 12” air vent fan which is reversible. This was fitted with the recommended 2 speed controller air vent 401961. All works fine but I was wondering if it is possible to fit a variable speed controller. The customer wants To have more control over the speed...
  7. M

    Variable voltage 220v Appliance (Type I) to 110v (Type B) socket,

    Hello everybody, I am not an electrician or anything of the sort, but figured that this would be the best place to ask my question. I have a 220v heating appliance with a Chinese Type I plug. The appliance has a volatge regulator knob that allows voltage to be varied anywhere between 0v and...
  8. B

    RCD with variable ms an mA settings

    Hi, been looking at variable RCDs as came across one at a job, settings range from 30mA to 3 Amps and ms from no delay to 3 second delay can someone explain please? As if I come to test my tester only goes up to 1000mA also some I’ve seen are set on like 0.5 seconds which isn’t an RCD meant to...
  9. E

    Variable Power Heater Coil

    Hello all, I'm new here but have looked around first. I'm hoping for some help on a project I'm trying to create. I want to create a heated element which I can then use a small fan (either PC or small radial, 12/24V) to blow the air around a chamber. I'll be using partly polycarbonate and...
  10. Mike Johnson

    Variable speed Pool pumps, France

    A lot of guys around my area of France have spent over €1500.00 on variable speed pumps for their pools, the saving on electrical consumption can be quite considerable over a year, but the cost of the pumps against a standard pump at €400.00 seems to beg the question can't a controller be used...
  11. joel89

    Fuji Variable Frequency Drives

    Hi all I have been told these are good drives for crane control? not used them yet but the prices seem a lot cheaper than the telemecanique alternative wondered if anyone had used them and or programmed them?
  12. Big Man

    IR variable results new install.

    Any ideas gratefully received. I'm testing a new ground floor extension. Brand new lighting circuit. Live switches. Only feeding jcc fgled6. Continuity is fine. 0.33 at furthest point. Circuit disconnected from the cu I've had readings from 88MOhms to >299MOhms line/cpc. The others are fine...
  13. J

    Variable Frequency Drives

    We intend to install VFDs for the motors installed at our facility. Can anyone tell/share the IEC/NEC/IEEE code/standard showing upto what kilowatt rating of the motor we can use the DOL starter type and after what kilowatt rating we have to install VFD. For example, I seen a Electrical...
  14. L

    Lenze smd variable frequency drives 0.37Kw. 3/PE 400-480v BEST PRICE

    Up for seel VFD were used between 0 and 7 months. Many of them were used only were installed and then removed. All VFD will be delivered in original boxes. Each VFD is tested before shipment. VFD CONDITION IS LIKE NEW. 100% QUALITY GUARANTEE OR MONEY BACK ! DO NOT MISS THE BEST PRICE IN THE...
  15. D

    Hager DB Fixed or Variable? Domestic

    Not sure which is best fixed or variable split on the Hager DB? Would love to hear from anyone who's fitted them and which your prefer...cheers!
  16. N

    Variable T-attenuator design

    First of all.. i don't know whether this is a correct section to post my question. Seems that none of the section suit my question, so i will ask here first. Recently i given a question that asked to design a variable T-attenuator. Question as below: The aim of the project is to design and...
  17. V

    Simple compensated, variable heating control

    Hi guys, I've got the following question: On a simple compensated, variable heating control, what temperature measurements are required? I hope to receive the answer. Thank you in advance to all of you!
  18. B

    Help!! What variable resistor do i need?

    Hi, I need a little bit of help, i am going to wire a battery pack to a small electric motor, but i need to be able to control the speed of the motor. I know i need a variable resistor, but which one? I am really confused and need someone who has the knowledge to explain to me, what resistor i...
  19. andyb

    Variable Drive Motors

    Has anyone been involved with variable drive motors? I've been asked to run a feed for one and although the supply cable is only 2.5mm, I've been asked to install a 16mm earth. Can anyone explain?

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