contacts | Page 3

contacts

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  1. D

    switching ballasts

    can someone clear this up for me? is switching electronic ballasts more severe on contacts than switching magnetic? and also according to this spec Steinel it can switch 8 electronic ballasts max or 500watt of standard(low-frequency with cap) fluorescent lighting do i have that right ?for...
  2. S

    Finding work

    Does anybody know how you can find out where contracts are up for tender? I know there are swebsites which claim to help you do this but they seem very expensive for doing something I can do myself if I knew where to look!
  3. S

    Heating wiring problem.

    Does anyone know how I can resolve the following problem . -Two rooms are fitted with plumbed underfloor heating. -Room one has own thermstat wired to call 4 wire Actuator on manifold. -Room two also has own themostat wired to call seperate 4 wire actuator on manifold. -Second switch wire on...
  4. J

    Stainless steel contacts?

    I was given some audio plugs purchased by a friend from maplin with which to repair an audio system here at sea. No matter what temperature I achieved on the plug the solder wouldn't take (yes I burnt out the nylon in the wire). I had a closer look. It's stainless steel. How would standard...
  5. D

    hold on contacts

    Just wondering if anyone could explain how hold on contacts work
  6. Jay Sparks

    Relay

    Does anyone know how to check a solid state relay to see if it is working?
  7. E

    Contacts

    I have a contactor and time clock for lighting and i need to switch this using a relay for 24v to a control panel. As it stands i have a 4 core to the timeclock. How do i wire a relay to the contactor so that i can switch the lighting on or off using this new control ?
  8. M

    No Volt contacts ??

    Forgive me for being clueless here but I am hearing a lot at the moment at work about no volt contacts and wiring them ! mainly for air con equipment, such as chillers pcb's and sometimes contacts for shutting down air conditioning in the event of a fire for obvious reasons from the fire panel...
  9. A

    Faulty Freezer

    Hi, I was just wondering if any expert can offer me advice on the following. After a manual defrost of an integrated freezer (CDA CW783) I put the freezer onto fast-freeze, which appeared to working normally. A few hours later the "Sockets" RCD tripped and wouldn't reset. I traced the fault to...
  10. S

    auxilliary contacts in relays and in vcb's

    what function does the auxilliary contacts in vcb and relays serve? what's the need for auxilliary relays??
  11. L

    Contactors : and how they work

    Let me rattle your brains and if you can you give us a brief desciption on how they actually work with the windings n that? why we use them? drawing would be nice :)

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