contactor

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  1. S

    Contactor Query

    Hi guys came across this today and it puzzled me slightly, it's a contactor for an extraction fan in the roof of a factory bay. The white cable on your right goes up to a thermostat which appears to control the relay on the right which appears to control the contactor, just wondering why you'd...
  2. uksparks

    12v Relay

    Hi, I think I asked this before, but have a 12v alarm output that I want to switch a 230v load. Can you get a din rail mounted relay or Contactor?
  3. D

    problems with lighting contactor

    Hello guys. This is my first post on any forum so please go easy on me. Thanks in advance for any help. I'm a domestic electrician and so never have to deal with contactors but I'm doing a job for a friend of a friend and the lighting contactor ( Ac...
  4. S

    Indicators in parallel with contactor coils

    Am I right in thinking it is bad practice to wire indicators in parallel with contactor coils? If so, why? Thanks
  5. S

    Contactor advice

    Hi all, First of all i haven't much experience with contactors, I need to install a timer to switch 3 discharge lamps. I vaguely remember from my training that contactors should be used when using a timer unit to switch discharge lighting, as timer contacts will burn out when switching the...
  6. A

    LED Lighting through 20a single module contactor

    Hi All. Does anyone here have experience with the following. Contactor is buzzing loudly when energised. The contactor is feeding banks of LED light banks. Do you know if LED lights have to be de-rated for use with contactors? Thanks
  7. R

    Help with wiring up a contactor and stop switch to a VFD

    Morning, I'm building a small control panel for a VFD, The VFD has 24v lines for motor run and stop, these use a momentary switch. The stop button provides a braking function for the motor through the VFD. I want to connect a contactor between the VFD and motor to safely isolate the motor. I...
  8. londonfire

    Replacing an obsolete contactor.

    Good evening gentlemen. I went out yesterday to look at a lighting circuit in an underground garage that is not working. Turns out the contactor is shot. Its a brook Crompton hr1710 that is listed as an obsolete part. I was looking for opinions on looking for a like for like replacement...
  9. S

    RCD trip out

    I've been called to a job for a friend as his swimming pool pump keep tripping the RCD, it took me a while to work out how the other electrician had wired it but of what I see, it's a bit of a mess. I'll do my best to explain for the pool I can see 3 MCB's used 1st is a 6A type b in to a time...
    • Simon Hall
    • Thread
    • contactor course out rcd swimming trip trips while
    • Replies: 54
    • Forum: UK Electrical Forum
  10. C

    3 phase motor star delta staring controls

    Hi guys with the star delta motor starting controls I know you have 3 contractors, the main, the star & then delta. The star contractor is looped out as star configuration at the top but I cannot see how the delta contractor is configured in delta, it just looks like a standard contractor to me...
  11. G

    4 Pole Contactor

    I need to wire up 7 water heaters in an office building and the client wants the water heaters to switch off at 5pm when the office closes and switch back on at 7am just before the office opens in the morning.... Can I use a electromechanical timeswitch to operate 2 x 4 pole contactors mounted...
  12. P

    40A single phase contactor + timer motor control

    need some advice really bee asked to wire in a timer to a swimming pool heater as it is on constant run, which I explained is how they are supposed to run. does anyone know of a single phase 230v contactor of AV-3 type I can use with a simple manual clock timer switch, or suggest any other...
  13. D

    contactor

    what size contactor (delta) do i need to run a 15kw 3 phase motor 24 v coil pls
  14. uksparks

    Time clock stopped working

    Hi, any ideas chaps? Got the time clock below, was working fine 12 months ago before works started, just gone to power up and am getting no voltage on the output, wound it up etc...
    • uksparks
    • Thread
    • attach clock contactor electrical work neutral switch time working wylex
    • Replies: 48
    • Forum: UK Electrical Forum
  15. S

    No Volts Protection

    Hi guys I've got a customer that's changing a centrifugal exhaust fan from a single phase version to a 2.2kw three phase version. This is currently run through a rotary isolator into a contactor with the control run through a timer no DOL present. My question is does something like an exhaust...
  16. M

    contactor burning out

    I recently fitted a new contactor three phase 10amp with 230volt coil, now it was working fine for about two weeks and now seems to have burnt out. I can not manually push the contactor in even using a screwdriver as it is solid. The overload is set to 4 amps so shouldn't be a problem with that...
  17. G

    communal lighting , contactor

    got a 240v ac set up for communal lighting in a small block of flats , call out was that outside lights not working , the contactor has 25mm incomer from db1 and 25mm outgoing to db2 incoming side also has 1.5mm t&e. i cant seem to find the operating device for the contactor any...
    • glasgospark
    • Thread
    • communal contactor lighting
    • Replies: 56
    • Forum: UK Electrical Forum
  18. S

    led and photocell.

    recentlly fitted 4x23w,1x50w flood,and 2x80w floods via a photocell outside. the photocell keeps failing after about 4 weeks and ive changed it twice already. does anyone know why as im confused. the cell is capable of switching 1000w so is easily suitable(so i thought).. thanks simon
    • simon07904
    • Thread
    • contactor electronic led photocell start
    • Replies: 4
    • Forum: UK Electrical Forum
  19. B

    schneider multi 9 contactor

    I feel like a dope for asking but can someone tell me if a 25 amp 4 pole schneider multi 9 contactor is rated at 25 amps per pole or 25 amps in total? Ive been having a look at the schneider characteristics page and still wasnt sure
    • barneybhoy
    • Thread
    • contactor multi schneider
    • Replies: 15
    • Forum: UK Electrical Forum
  20. B

    Noisy contactor

    Hello I have installed a 100amp contactor in a generator control system I have designed tested and installed its a simple basic design two 230v ac contactors controlled individually by 12v 250v contact relays (12v relay used to get away with a cat5 between shed and house) and to change it all...

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