contactors

  1. W

    How Is A Time Clock Wired In A Consumer Unit To Operate Contactors To Control Mcbs For The Heating

    Hi everyone, I'm very curious about economy 7 boards on electrical installations with time clock on din rail and the contactors. I have a photo to show exactly what I mean, now I want to know how does the time clock switch the contactor to allow the heaters to operate from economy 7 times, I do...
    • WestMidsElectrical
    • Thread
    • clock consumer consumer unit contactors control heating mcbs operate time unit wired
    • Replies: 4
    • Forum: Central Heating Systems
  2. S

    Ceramic bottle fuse holder, sudden short to DIN rail (earth)

    Hello... Anyone had any extended experience with ceramic bottle fuse holders. Shortly after turning on isolator switch there was phase to ground short between one of fuse terminal metallic parts and DIN rail (35A gL/gG fuses have been taken out to test the correct working order of contactors)...
    • sysrq
    • Thread
    • after ceramic contactors din rail earth fuse holder motor phase short
    • Replies: 2
    • Forum: UK Electrical Forum
  3. B

    Contactor Fault

    Hi just after a bit of help with a intermentant issue I have with some car park lighting that is controlled by a time clock and 3 contactors. The contactors are sticking in so the lighting is staying on, ive taken off the load for the lights and the CB for the time clock which resets the...
  4. R

    Newbie seeking help regarding contactors please :)

    Hello people, I'm Mark from Barnsley and I'm in need of some help, I am new here and not sure how this forum works yet so please bare with me and feel free to correct me if I am wrong! Anyway, What I'm actually here for.... I have a Murex Tradesmig 160 mig welder that I bought recently as...
    • robinson16v
    • Thread
    • contactors help newbie please regarding
    • Replies: 4
    • Forum: The Welcome Forum
  5. A

    question about contactors

    hi guys just a newbie question, i know that a contactor functions when it recieves a current from a switch wire then closing the contactor... however does the switch line current have to be constantly flowing in order to keep the contactors closed? also why use contactors? i mean a simple...
  6. P

    Switching 6kW load with 7 day programmer

    I need to switch 2No 3kW heaters on using a 7 day heating programmer. Presumably I'll need a contactor to switch that load rather than the heating programmer (?). Can anyone recommend a suitable one? Many thanks if anyone can help, Peter
    • peterhanson
    • Thread
    • contactor contactors heating load programmer rated single switch switching
    • Replies: 13
    • Forum: UK Electrical Forum
  7. M

    Places to sell a job lot of contactors

    I have a job lot of contactors I have no idea where to sell. Ebay has very little of the items i am trying to sell. Could do with some details of people who can take on job lots like this. They are mostly Matsu****a contactors used at injection molding plant
  8. joel89

    Contactors and Relays (anti vibration ?)

    I have a panel, on our large hammer forge which causes a hell of a lot of vibration hitting a 5tonne tube, anyway I am loosing my retain on 2 x small contactors LC1 18a which feed a servo and lubrication system and when the tube is nearly forged into a bottle neck shape it also causes a small 5a...
  9. S

    Contactors & Relays

    Hi We have recently installed a PV system that needs to be switched when a generator starts. The generator control panel has a VFC (240V/5A) we can use to signal the contactor. There is a 150m run to the PV supply I need to isolate. I was planning to use a 40A contactor to isolate, however...
  10. C

    parallel conductors and neutral switching of through contactors in lighting circuits

    Hi guys, I have come across two problems today well acutely three so I will list them first.. 1st Testing a 4mm radial circuit today or so I thought! I asked the young lad to go to the end of line and take an r1+r2 reading. When he opened up the last point he said that there were four 2.5...
  11. J

    LED ceiling tiles startup current

    I have been asked to quote a shop fit out that will have 52x 45w LED ceiling tiles overall. they would like 12 switched at a time if possible, but on a previous job I only had 6 on one switch and had to use a 10A C-type MCB just to sto pthem tripping out on startup. I was thinking of wiring...
  12. G

    Contactors

    Hello guys , can you point me in the right direction i have a lighting install I need to change from being controlled via light switch to contactor and photo cell my understanding feed in top of contactor load out bottom , feed to photocell with neutral switched back to contactor if I'm...
  13. R

    Lighting contactors physical wiring

    Say I have a load of lights that require a cable size of 10mm through a contactor fused accordingly, what is the technique for tapping each individual light off this 10mm radial, what methods are available to tee off the circuit to each fitting. I assume a fused spur is required at each and...
    • Richard3009
    • Thread
    • contactors lighting wiring
    • Replies: 29
    • Forum: UK Electrical Forum
  14. R

    Lighting contactors

    When installing loads of lights in a warehouse, is it common practice to use lighting contactors driven from a standard light switch, what would a typical installation on a large scale consist of.
  15. N

    Contactors

    hello… i am new here so hi to you all. I am in my 3rd year of my apprenticship. I have a question that i seem to be getting confused about (not collage related) we work in some industrial properties most of the time and the lighting is switch via a contactor.. i understand the coil pulls in...
  16. J

    Contactors

    Hello. I was was just thinking about contactors and wondered if it was possible to ..... 3x 10a mcb supplying 3 lighting circuits is it possible to switch all 3 circuits on and off via one switch?
  17. D

    Fault on BMS

    Hi Guys, I work for a maintenance company and just had a call out to attend tomorrow at a TK Maxx store. The info I have been given is that the store lights are not turning off when the alarm is set by the manager at closing. I know all these stores use building management systems and I just...
  18. C

    controlling heaters with contactors.

    Hi Everyone, I need some advice on heating control circuits please. I have 6 single phase 2kw infrared heaters which are fed from 6 individual 15A circuits on a 3 phase distribution board. Each circuit then goes to a local switch next to each heater and then on to the heater itself, and is...
  19. B

    Sizing Contactor to control Photovoltaic DC

    I know this is a U.K. site but I'm hoping someone will be able to answer a qn. Recently I saw a that a company was producing a remote disconnect safety system for PV panels mounted on a roof.This is to disconnect the arrays automatically if the mains is disconnected or manually after a storm or...
  20. M

    Car Ramp 3 Phase

    Hi i am currently installing a Vehicle ramp to my garage, i have discovered that the motor is a dual 3 phase motor and can run on 230 volts 3 phase i have rewired the motor to suit. I am using a Yaskawa Ac Drive V1000 inverter to take 240v single phase to 240v three phase, with the unit...
    • Mark777s
    • Thread
    • 3 phase car contactors electrician motor phase
    • Replies: 14
    • Forum: UK Electrical Forum
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