SuperlecDirect - ElectriciansForums.net Electrical Suppliers
This official sponsor may provide discounts for members

pumps

  1. S

    Vacuum and compressor automation

    I've been asked to design a panel for 2x 3phase comressors and 2x 3phase vacuum pumps. Non of the motors can start at the same time and between the 2, they have to run alternately. The vacuum pumps need to be wired so that if more vacuum is needed the other will start. Keep in mind that when...
  2. 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...
  3. S

    Domestic Shower pump power work/alterations

    Afternoon to all! I have to replace my current shower pump as it's on the way out, it's loud at the best of times so I have taken the opportunity to replace with a quieter unit but my problem is it's a different make and as a result the power supply is also different, the new pump comes with a...
  4. S

    Power supply to 380V pumps from 460V panel

    Dear all, We have 460V MCC panel for existing pumps in our plant. We need to give supply to new 380V rated pumps in the same panel. There is space available in the panels(Out of 9, one panel almost free). So please suggest is it possible to make the arrangement for MCC feeders in the same...
  5. R

    Panel problem

    Hi guys, after your thoughts on a problem i have on a panel at a sand quarry feeding the main sand pumps and de-watering screens. The panels main isolator is tripping at random times, it can run for an hour with no problems then it will blow. There are 2 rcd's feeding the pumps and neither of...
  6. T

    EU's doing away with 3phase Pumps and motors

    This is starting to get right on my !! Now. Needed a few pumps in the last few months, which wasn't the easiest of jobs getting like for like. But now I can't get them or any for that. All the pump and motor manufacturers are only supplying single phase motors wdf. Some ass in the EU/ G12 or...
  7. G

    gajimafeet

    I would like to learn as much as i can. I have a background in Pumps and worked for KSB Pumps for 8 years in sales. I am now in sales and come across a lot of variable speed drives in Industry. I studied electronics and Electrical but could not get an apprenticeship in south Africa. I am always...
  8. Dan

    Who Are Our Resident Green Energy / Solar Experts?

    Just wondering who our resident solar experts are.
  9. L

    Domestic Sewage Pump!

    Evening All I have a domestic sewage pump to connect up later on this week. Its a 3 float system(stop, Start,Assist) and has two pumps. The pumps are only supposed to run one at a time in sequence to lengthen their lifespan. They will run together if the assist float comes in to play. Its a...
  10. astormatt

    Pumps and Relays

    Hi all I am working on a job and I am having trouble getting my head around it. Normal systems are fine but this is causing me a headache. It is an S plan with an additional pump so both the DHW and CH have a pump and a valve, I know that the pumps have to be split due to it back feeding but...
  11. P

    Multiple Pumps on Heating Systems

    Hi all, Up until now I have mainly been dealing with bog standard Y and S plan heating systems with single pumps albeit sometimes adding smart control systems etc but in the last week I have come across a couple of installations where there are multiple valves and pumps in the system and I am...
  12. andyb

    VFD Volt Drop Question

    I need a help from those on here with experience with 3 phase motors and VFDs. I have been asked to install the cable to supply a couple of pumps that will be controlled using a variable frequency drive. As they are submersible pumps they come pre wired with 12 core 2.5 rubber cable, 10 cores...
  13. E

    Heating system wiring

    Im just in the process of installing a large heating / hot water system in a restaurant / bar and need some advice on selection of gear for wiring it. I would really like to have everything going back to a main "din rail" enclosure. I need to install relays in the system as I have 6 motorised...
  14. S

    Demand of Solar Irrigation Pump is increasing in Bangladesh

    Irrigation is one of the major part of Bangladesh economy. In most of the area Farmers don’t have the access to grid electricity for well pump so demand of solar powered well pump is increasing. Currently, there are almost 1.61 million irrigation pumps running in the country, of which 1.34...
  15. K

    D curve breaker

    I have been asked by a customer to solve a problem, he has a 3 phase 20A D curve breaker supplying 3 single phase breakers 2 x 6A and 1 x 2A. The 6A breakers are supplying 2 pumps with a load of about 4A each. When 1 of the pumps are turned on, the 20A trips. Any ideas why? The earth loop...
  16. P

    Domestic Sequential or random switching

    I have a rainwater harvesting system with three tanks each with a separate pump. I will have a pressure vessel and pressure switch to automatically start pumping when water is required. However, I do not want to run all three pumps together but one at a time. I need a switch which will ensure...
  17. Mark.W

    Switching

    Evening Chaps I've got a switching conundrum that I was hoping one of you guys could help me with! I've been working on a heating system and the previous spark managed to run 2 pumps either together or independently with one boiler and a 2 channel programmer! I however cannot get pump 1 to...
  18. T

    Bubble Bursts on those installing Solar Thermodynamics

    We briefly looked at this technology and decided that there was no evidence to support claims being made for it. Got this letter from MCS about half an hour ago: "17th October 2012 Dear Solar Thermal Installer MCS has recently become aware of a number of products that are being sold into the...
  19. G

    solar pv in cyprus

    no i don't know why this forum doesn't support my shift key. however i'll persevere. i have a friend in cyprus who would like to run his swimming pool pumps off solar pv. does anyone on here know anything about cyprus eg is there the equivalent of a fit qestion mark. unlikely i think. what...
  20. G

    Whats the next big thing in Renewables

    HI all, What do you guys think the next thing will be with renewables, or what other areas are there thats worth it now, Heat Pumps,Biomass?? looking at something else other than PV now that seems dead, i assume that if you have the quality management system in place its pretty much the same...
  21. yellowvanman

    UFH and other heating

    Got to wire up the heating system in a house later this week and its not totally straightforward: UnderFloorHeating on ground floor - 6 zones, radiators on 1st and 2nd floor, hot water cylinder and a set of towel rails, all of which need to be on different timers (4). Problem is when joining...
  22. johnboy6083

    swimming at work.

    last night, i had a phonecall from an engineer at work. "John can you and your mate go and take a look at a pump thats failed?" off we go. The pumps are sat in an underground plant room, that has no roof yet. first thing i do (after isolating, and locking off) is disconnect the couplings from...
  23. S

    Heating System

    Hi there, I,ve just joined this site in the hope I can get some help with a job that I,m doing. Its a standard fully pumped heating system, three zones (one for hot water, one downstairs heating and one upstairs heating) All controlled by a three channel timeclock. The hot water is controlled by...
  24. V

    heating control pumps

    I have been trying all last week to try to get two pumps to work together as well as work indepently of each othe Ill explain. I have a three channel time clock HW,CH1 and CH2 I have a oil fired burner and two pumps.When I call for CH1 or CH2 I want the two pumps to run when I call for hot...
Top Bottom