20-04-2015, 09:48 PM
I do not think that this is a good attempt.
You have described some of the very basic properties and have said in what sort of places you may find it but you have said very little about the characteristics that make it any different from the sort of relay that you can but for two pounds from Maplin or RS.
There is a clue in the question when it talks about and AC or DC railway, how has your chosen relay been made immune to traction noise?; why have you picked an operating voltage of 24v and not 2v or 500v?; what qualities do you demand from the relay contacts (current carrying, contact resistance, anti welding etc)?
You have described an ideal relay that operates exactly on 24v - what qualities do you want or can you tolerate for the pick up voltage and the hysteresis between that and the drop away?
Being really picky, you have said that your relay has 2 front and 2 back contacts. Strictly speaking your relay has 2 change over contacts (often called 2 Front/Back) since they are not independent from each other sharing the common armature.
You could also include elements like whether it is a plug in relay or fixed wiring, whether there is any coding for the plug in, issues around the security / sealing of the relay, visibility of contacts for inspection.
In the second section, you give some examples of limitation, but you have not given any appreciable explanation of the headings you have put.
Sorry to be blunt but I hope that this gives you some ideas for improvement.
Peter
You have described some of the very basic properties and have said in what sort of places you may find it but you have said very little about the characteristics that make it any different from the sort of relay that you can but for two pounds from Maplin or RS.
There is a clue in the question when it talks about and AC or DC railway, how has your chosen relay been made immune to traction noise?; why have you picked an operating voltage of 24v and not 2v or 500v?; what qualities do you demand from the relay contacts (current carrying, contact resistance, anti welding etc)?
You have described an ideal relay that operates exactly on 24v - what qualities do you want or can you tolerate for the pick up voltage and the hysteresis between that and the drop away?
Being really picky, you have said that your relay has 2 front and 2 back contacts. Strictly speaking your relay has 2 change over contacts (often called 2 Front/Back) since they are not independent from each other sharing the common armature.
You could also include elements like whether it is a plug in relay or fixed wiring, whether there is any coding for the plug in, issues around the security / sealing of the relay, visibility of contacts for inspection.
In the second section, you give some examples of limitation, but you have not given any appreciable explanation of the headings you have put.
Sorry to be blunt but I hope that this gives you some ideas for improvement.
Peter