Jump to content


power supply trip

  • Please log in to reply
2 replies to this topic

#1 mali


    Junior Member

  • Members
  • PipPip
  • 4 posts

Posted 27 April 2006 - 05:25 PM

We have 400A breaker in Substation which feeds supply to canteen ,supply recived with 630A breaker then transformer(power250KVA,415v,348A) then 400A breaker feeds busbar which feeds many loads with individual breaker including 6Hot plat oven through 60A breaker.We have got trip many time due to some fault some time with plat oven,every time both main breaker (400A) at substation and transformer sec. breaker (400A) triped at the same time and that cause trip to all the canteen supply. my quation is ,what is the best solution to avoid all supply trip in case we got problem with that oven(but without replacing the oven itself).

#2 mariomaggi


    Senior Member

  • Full Member
  • PipPipPipPipPip
  • 234 posts
  • Gender:Male
  • Location:Milan, Italy
  • Interests:electric vehicles http://www.evlist.it , 3-phase AC sources to test PV inverters, high-power AC/DC power supplies up to 1500 VDC to test photovoltaic inverters, bidirectional AC/DC power supplies to test and simulate big batteries, infrared windows for thermography, renewable energies, special electric motors, special inverters, energy savings, power quality

Posted 29 April 2006 - 01:58 PM

Dear mali,
sometimes electric energy used for ovens is wrongly dissipated by bad thermal insulation or by a wrong infra-red emissivity of hot resistors.
Improving both arguments could give you 2 benefits:
- reduced energy consumption
- reduced possibility to have damages
I hope that this is your case.


Mario Maggi - Italy - http://www.evlist.ithttps://www.axu.it

#3 Rzn


    Intermediate Member

  • Full Member
  • PipPipPip
  • 39 posts

Posted 16 October 2006 - 08:53 AM

Dear mali
Mario is right. You should reduced your energy consumption. Your load is toutching with MCCB thermal tripping curves.

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users