contactors

contactors

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  1. bugraekuklu

    Switching between phases depending on live health

    Hello, I'm pretty new to the forum. Hopefully, this is the best place to post it somehow. Currently, I have a setup of a distribution box, which is able to supply 63A three-phase load to an EV charger, running two-phase load of 16A. It demands 3.7kW from each phase, making it a 7.4kW charger...
  2. UKMeterman

    Quiet contactors needed for some 20KW fan heaters

    Hi, I am looking for some quiet contactors to control a pair of 3 phase 20KW fan heaters in an art gallery. Are there any favourite suppliers?
  3. u2v2w2

    Contactors lost continuity

    What could be the reason for all of the three Siemens contactors on a 37kW star delta starter to lose continuity on auxiliary contacts and main contacts all at once? Probably the best thing to do is to replace them since cleaning would be too fiddly. There are no signs of water intrusion only...
  4. A

    Can multiple motors share 1 mcb.

    Hi, I am installing 24 No 2.2Kw 3Ph motors that will drive cooling fans. The plant room for the install is not what you would call spacious so trying to keep everything as tight as possible within reason. The motors are all controlled through an automated system which feeds back to an...
  5. B

    Removing a relay

    I'm trying to learn more about relays. Can someone link to a resource that describes how they work? I mean like a wiring diagram of 1L1 3L2 5L3 2T1 4T2 6T3... Here is a LC1K09 that is connected to a lighting circuit. What are the alternative ways to remove/disconnect it and instead have the...
  6. J

    What is the purpose of the multi9 contactors

    Hi, Last week I went to a property where the owners had just moved in. They wanted advice about various electrical things including a large DB filled with these multi9 TL contactors. Does anyone know what they are for and is it easy to remove them to change the board for a more conventional system?
  7. Y

    Changing original 32Amp contactors for solid state relays?

    Hi Guys, My underfloor heating has 3 x 32amp contactors. They make a hell of a thump when opening and closing. Bit of a hum also. I'm looking at the idea of changing them for solid state relays like this one Solid State Relay - 40A (3-32V DC Input) - COM-13015 - SparkFun Electronics -...
  8. K

    Chattering Contactors

    I am working on a chiller system that runs a hydraulic pump as well as a cooling fan. I was sent out to replace the control board for the system as well as a contactor. I have a transformer running 24VAC to A1 on both the pump contactor and fan contactor as well as a port on my control board...
  9. H

    Problem with contactors wired in parallel

    OK I've got 2 contactors where the coils are wired in parallel. They are sitting right next to each other, One pulls in and holds perfectly well. The other pulls in and drops out. Pulls in again drops out. Ect. Ect. For as long as you are trying to keep the contacts closed. I've tried...
  10. B

    Solar Where to purchase 2 pole DC Contactors suitable for switching 20-25amp 600volt DC PV array preferably with 230volt AC coil.

    I am trying, with little success, to purchase 2 pole DC Contactors suitable for switching 20-25amp 600volt DC preferably with 230volt AC coil. I require these for switching the supply from PV array. If you are able to supply or suggest where I might be able to get them I would be most grateful...
  11. C

    Why are the contactors always closed/energized?

    I just installed a brand new 36 kw electric boiler. 240v, 3 ph, works good, more expensive to operate than I had hoped...regardless when the power/circuit breakers are on, the contactors energize/close always. Why? That makes no sense to me. What’s their purpose if always energized. Why not...
  12. L

    Energize a contactor/relay from multiple toggle (not momentary) switches?

    Is it possible to energize a contactor/relay from multiple toggle (not momentary) switches in a way similar to 3-way switches? If so, what components and setup would do that? The purpose is to control lighting from several sources and the reason for not using simple 3-way switches is that the...
  13. D

    230/250 V Contactors Buzzing/Hot

    Hi. I've got some lighting & cooker contactors buzzing & overheating.. There are a few old ones in situ with visual thermal damage. coil rated at 250V I have new ones that are quiet but still warm to touch the sides. coil rated at 230V I've read that the 230/250 AC coil contactors dont cope...
  14. James

    OLD Contactors available

    not quite sure how to tag someone in, @Lucien Nunes hope that worked? I have 3 contactors and original timer unit. circa. 1975 free to good home. just about to replace them with modern alternatives because the line contactor has developed a short on L2 to L3 when energised. I will remove...
  15. I

    Acb,s mccb,s mcb,s contactors enclosures

    In the middle of stripping out a large mains panel and have loads of stuff for sale if anyone interested all merlin gerin and ellison all in exellent condition too much to list
  16. I

    Digital control of contactors

    We are trying to control a bunch of 3 phase contactors using an HMI. The contactors' coils are activated by two lines of the 240V 3 phase source (L1 and L2). We are trying to figure out if the relays needed for activating the coils should be rated at 120V or 240V, or if we need another type of...
  17. Mark Whitehouse

    Which Starter Contactor

    Hi all I have a 3 hp single phase motor that only runs when you hold the button and stops when you release it. I am struggling to get my head around which contactor to get for it. Any help would be great.
  18. D

    Anyone use the Hylec DOC contactors and overload relays?

    Type: Hylec-APL | Motor Control Gear | Contactors - https://www.hylec-apl.com/contactors & Hylec-APL | Motor Control Gear | Thermal Overload Relays - https://www.hylec-apl.com/thermal-overload-relays Got a project coming up where I need to remotely start about 20 pumps so looking at Hylec as...
  19. joel89

    Schneider 115a 3 pole contactors

    brand new without the boxes 115a contactors with 110v coils. 3 for sale I am asking for offers around £150 per contactor these cost £300 when I bought them.
  20. A

    Understanding lighting contactor

    Hi guys, I'm new on here, I'm a level 3 apprentice, most of my experience is commercial and domestic, my boss has just taken on a large industrial job, in which we are testing and rewiring everything, first we are doing the lights, we will be fitting some lighting contacters, which will run...

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