contactors | Page 4

contactors

Recent contents View information Top users
  1. G

    Lighting with contactors and Emergency lighting wiring

    Hi, As part of my college project I have to design the electrical system for a supermarket. The florescent lights are switched using contactors. These contactors will be switched by a bank of switches at the entrance to the premises and the contactors will switch on the lights when switched...
  2. S

    Fitting dol contactor for 415 v3 phase fans

    I have to fit dol contactor for 415v 3phase fans where the contactor must switch at 110volt how is this done please.
  3. V

    Contactors

    Is it normal for Hager contactors to humm when switched on? Any comments gratefully received Thanks in advance Victor
  4. D

    Contactors

    hi doing some lights in a commercial unit and want to switch them on contacters question is need to obviously have overcurrent protection how do you people get around this. I was thinking supply the contactors in a seperate unit from mcbs in the 3 phase board. please help
  5. P

    Timers & N/O Contactors

    Been installing energy saving equipment in M&S recently and weve had to strip out loads of kit and the boss said i could have it to try and make a few extra quid. So I have: 7No. Theben din rail time clocks, 4 in really good condition, other 3 just have a crack on the plastic face protector...
  6. T

    just found contactors on a domestic cooker circuit.

    Hi all. New to this site. Just been to check out the electrics for a friend that has moved house. Consumer unit is part RCD / part not i.e 16th. BUT he has a totally odd wiring set up for the cooker circuits. Consumer unit has a breaker 32amp for hob and another breaker 32amp, for the cooker BUT...
  7. R

    Lost trying to wire contactors and timers

    Ive got a 20amp 2 pole proteus din rail contactor Proteus - Products and proteus 16amp 1 mod din rail timer.... Proteus - Products Hoping to use for night day switching of a selection of flurorescent (7 x 70w )and downlights (12 x 50w)with a total load of about 6 amps/1482w. Thing is not...
  8. D

    Relays , Contactors and Electronics...

    Im bit empty headed when it comes to them things but i just applied for a job that pays silly money and well i need to brush up on my skills and knowledge about them...! any good books or courses you know about! sorry for sounding ignorant about them but they never really floated my boat so...
  9. S

    Question about non-automatic transfer switch

    hi, i want to design non-automatic transfer switch by 2 contactors and push buttons. my question is do i need mechanical between the 2 contactors? or it is enough to work with NO-NC for both contactors. please help me
  10. K

    Contactors

    Hi all. I have 5 brand new unused contactors sat doing nothing. 2 25A 4pole Merlin Gerin 2 40 A 4pole Merlin Gerin 1 7.5kW 3pole Moeller All 240V coils. any offers?
  11. I

    Anyone much experience with Relays?

    I'm embarrassed to say I know very little about Relays. Never really had much dealings with them. I have a job next week and from the email I got from the company I will have to do the following: 1: Install new speed drives in new enclosure with MCBs ( Either 1 or 2 Drives ) 2: Mount new...
  12. E

    How to 'size' contactors for star delta circuit ?

    Hi All , How do i size the main , star and delta contactors for a motor control circuit using a 50Kw motor ? Do i just rate all contactors at 50 kW ? Any help appreciated. Thanks :)
  13. E

    Contactors

    Afternoon all, I need to switch a reasonably high load (higher than 13 amps) on an several electric underfloor heating circuits. I'm assuming I can use a contactor for this. Having never wired one before, I thought I'd just double check the connections: A1/A2 - Wire the normal feed to...
  14. J

    contactors and emergency stop buttons.

    bit of advice plz guys... im working in a hospital decontamination room. there will be four big sterilising machines to clean endoscopy instruments. they are single phase, on 32amp rotary isolators. (each on their own 32amp rcbos) have to put in a push button emergency stop, that knocks a 32amp...
  15. S

    600 watt discharge lighting and contactors

    HELLO This is my first post on here and i have a daft question .I have a125amp 3 phase 4 wire 415v/50hz supply from a diesel gennerator 105kva.the customer wants 12- 600watt discharge lights installing with a timer to do the switching,i've done all the cable, powerfactor and discrimination calcs...
  16. C

    Underfloor Heating Using Contactor(s)

    how do I wire a single phase contactor to underfloor heating? Do I take the load / ie the electrical mat to 2 and 4 and do i take a switch wire to A1 to switch the contactor? and should I locate the contactor(s) next to the consumer unit in a separate box with its own DIN rail? The house is a...
  17. B

    Am2

    hi there i have got my am2 on tue and am fairly confident with the installation but when it comes to the fault finding do you just use the test procedures out of the on site guide or do you have to use any other methods???? thank you
  18. P

    storage heaters via time clock and contactors help?

    i have installed a time clock and 2 contactors from it 2 control the heaters becoz the guy doesnt want the heaters coming on at the wknds (coz the shop is closed) anyway ever since i did this a couple days ago the heaters never heat up fully? so i connected them bypassin the contactors and timer...
  19. O

    contactors

    Evening all i hope there mite be some one about who can shead a bit of light on contactors. What are they about and what is its main job, whit in a commerical installation. All replyes welcome thanks very much (iam a bit unclear about them)
  20. B

    Contactors with MCBs?

    Hello All, I'm doing an installation in a nightclub soon, and am asking for your opinion on the best way to wire the following. The club has many lighting fixtures, each requiring a seperate supply from a 16A MCB. I am looking at about 30 circuits worth. However they would also like the...

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top