Recent content by honglien

Thank you very much!deserfox, turbingen and also kiribanda. I agree with you, Kiribanda, they are not used in SC cal. They are specified through some type test of LVCB.

Could any one tell me the different between the terms using in shortcircuit calculation: 1. Breaking capacity (Icu) (or Ultimate breaking capacity) vs 2. Making capacity (Icm) (or Service breaking capacity (Ics)) Thank all of you very much!

thank all of you! could you show me which standard for this issue?

Hi everybody! You know we could use UPS system or Diesel Gen.Set with ATS for emergency standby. But I wonder when and which system we choose? Hope you help me this issue. Thanks a bundle!

There are some terms Red book, White book, green book... I dont know how to classify the books.. Who can give me a detail explaination? Thanks and best regards!

Hi everyone! I am seeking for "IEEE 1547 Std for Interconnecting Distributed Resources with Electric Power Systems" and need your help. Could you give me a copy file (pdf for example, of this standard or link to download it? I'm looking for your reply. Thanks and Best Regards!

Hi everyone! I am having a privated project on evaluating the impacts of DG on Distribution Network, especially voltage profile and voltage stability of the network. I am seeking for the papers, books... on DG and hope to get your help. Thanks alot

Dear turkoman. You have an 1000kVA and cosf = 0.8 (Pg=800kW, Qg=600kVAr), ofcourse, and you want to get more power than 800kW output energy because of your loads were over, I think. Is that correct? If that, your generator will be heated as you know ('cause U R electrical engineer :-)). To...

Thanks for your suggests.

Hi every! I have a duty to design lighting for a football stadium but I almost have no experience in this fields. Electrical code for stadium lighting.. Could you help me about materials, links or tools..? I need your help! Thanks!

Thank jghrist! 1. I agree with you for the first reason. But as I mentioned, I wonder why transformer was not damaged? 2. The second is not very satisfactory because the was not any problem with the DIS' insulator. We had the Disconnector checked before installing and every parameters are ok. I...

Thanks for all and sorry for not deccribing the problems clearly. the more clearly problem shown in the file attached. Thanks! http://files.engineering.com/getfile.aspx?folder=7135a649-53b0-402b-8a29-0e24d48724a5&file=HY.doc

Thank Pis & Rag! The fuse blown and the support insulator of disconnector was broken. Ofcourse, the fuse is part of 35kV DIS assembly. The equipments are quite new equiped secondly after the first similar problem 2 months ago. And the specifications for the purpose are okey, I've checked.

Hi! Our factory is supplied by using a transformer_1000kVA-35/0.4kV, through an overhead line. At the connection point of the cable, supplied the transformer, we use an arrester to protect all equipments behide. Before the transformer, we use a disconnector with fuse. One day, after a shortage...

hi everybody! I need your help for my issue, that is cable connection in paralell. I have to supply for a load through an MCCB-3P-400V-500A. I used a Cu/XLPE/PVC/DSTA/PVC-3x240mm2-1x150mm2, but it was not cable to carry whole load. so I used one more Cu/XLPE/PVC/DSTA/PVC-3x70mm2-1x50mm2. 1. Is...