relays | Page 2

relays

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  1. S

    Lighting relays overheating. Solution?

    Evening all, Been to a customers unit recently due to some high level lighting that had stopped working. The cause was a relay that had overheated causing the neutral pole to fail open (they are 2 pole relays). When opening the panel I noticed the relays had signs of thermal damage. Some...
  2. 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...
  3. rdsn

    Start second device when first device starts working

    I'd would like to know if/how to turn on a second device (220V fan) when another device starts working automatically (air compressor). The idea is to have both always plugged to the electricity, but the fan working only when the air compressor kicks in. Could someone guide me how to do it...
  4. A

    Overvoltage/undervoltage protection relays

    Hi guys just wondering if anyone of you have any example of overvoltage/undervoltage relays that can be purchase online. I will not be using them in this country off course as the supply is fine. 3 phase ones and single phase Iv had a look so far at these two but i feel like they are cheap...
  5. S

    Electrical help needed, DIY, dimmaer wicthes blowing relays on my solar setup.

    Hi All, I wonder if you can help me.... I've been designing my own solar solution recently and built a small example that worked really well. I've taken it into production and working with an electrician friend of mine, here is what we setup: I have a solar panel connected (through a DC...
  6. W

    Panel Mods + Drawings

    Hello, I do the occasional small mod in control panels to improve processes (I work in the water industry) So in doing so I leave some basic drawings, but I just wondered if the ones I`m leaving behind are actually useful to someone following me behind. Essentially I want to ask the question...
  7. P

    Problems about IDMT relay

    Today i found that there are two questions about IDMT relay which i dont know how to answer. 1. What will haggen if electrician forget to insert the "plug" in the IDMT protection relay? 2. Discrimination is important in electric circuit protection. Please tell me how to apply the plug settings...
  8. astormatt

    Pumps and Relays

    Hi all I am working on a job and I am having trouble getting my head around it. Normal systems are fine but this is causing me a headache. It is an S plan with an additional pump so both the DHW and CH have a pump and a valve, I know that the pumps have to be split due to it back feeding but...
  9. E

    Heating system wiring

    Im just in the process of installing a large heating / hot water system in a restaurant / bar and need some advice on selection of gear for wiring it. I would really like to have everything going back to a main "din rail" enclosure. I need to install relays in the system as I have 6 motorised...
  10. B

    In line relay required

    Good morning all. I'm looking for a suitable solution to this problem. I am installing a heating system in a property which is to be controlled zonally via the Honeywell evohome Problem is that the relays for the evohome can only handle 5a maximum and one of the heaters is 1400w - almost 6a...
  11. M

    Is there a danger with relays without diodes

    I came across this LINK on Wikipedia the other day, since then I’ve done some googling and found out this is a known fact that if relay hasn’t got a diode fitted, this might/will cause a spike and might damage something on the Elise S1 circuit. I copy~pasted this form google "Since an...
  12. K

    Fluorescent lights and relays

    Hi all, I've just been to test a number of faults and have found a number of classrooms have relays on fluorescent lights? Can anyone think of a logical reason why someone would have installed them like this? Thanks in advance.
  13. R

    Switching for Biomass

    Hi I am currently working on a Biomass installation on a farm which will be servicing two houses and a fan blower. I need to be able to run the main pump in the boiler room when demand is called for from any of these 3 systems. 1 house is over 150m away with the other 90m in the opposite...
  14. 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...
  15. A

    startreck the crafts relays

    captain kirk told the engineer( cant remember his name) to increace the load on the relays(full relay power in fact) is that a wize thing to do whilst in outer space AND in another time zone-->>>>CRAZY any captain shouldnt shout at the engineer especially about his relays its no wonder they...
  16. S

    relays

    Need some help with some relays I've been looking at , what function do the orange tabs have on the relays ? , are they to operate normally open and normally closed contacts on the relays ?
  17. 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...
  18. kenburgess

    Use of Multiple relays in lighting circuits and Dual fed Consumer units.

    I am About to alter the wiring to my detached garageto incorporate two security lights controlled by an existing 4 zone controller (GJDDygiZone Digital 4 Zone Lighting Controller & Enunciator ) sitedin the house. The PIR’s present no problem as they can bewired directly back to the...
  19. B

    Switching coil and relays

    Hi all a couple of questions will a 24volt dc supply switch in a coil rated for 48volts dc. If so would it be safe. Also how much voltage can a 24volt relay take could it take 48volts or will it blow the relay? Thanks trig
  20. C

    Relay advice please

    Hi, have this relay which needs replacing but cannot seem to find the right one any where in the uk i think i may have found one at maplins but it has 8 pins on the bottom infact all the ones i do come across have 8 pins as you can see mine only has 6. does anyone know of an alternative...

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