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Hi All, I am trying to locate some clear literature on designing cables(for the I2t) component where the motor cables are protected by cascaded LV cricuit breakers or CB with current limiting fuse upstream protection. Thanks in Advance Romm

Hi All, Does anyone know who does recruiting for Oil/Gas from Australia? Thanks in Advance

Hi All, I am programming up a system using telemechanique advantys PLCs. I have a couple of questions that I would like help with? 1. Does anyone have a good summary of how to program these PLCs? 2. Specifically, how do you address in the PLC code the digital outputs on the STB DRA 3290...

Thanks for your interest, I am looking to design the whole MCC.

Hi All, I have been working as an operations engineer in australia for the last ten years and am currently designing an MCC with 1 11kw and 5 2kw Motors. I need assisstance in a correct design methodolgy for designing the MCC using type 2 protection and S&S components. Your assistance is...

Hi All, I work in the mining industry in Australia. Just wondered if anyone had some information regarding lighnting protection for above ground explosive magazine storage containers? Thanks in Advance

Hi All, Anyone know a good website that outylines recent safety incidents in Electrical Substations both indoor and outdoor

Hi all, anyone know how to cordinate a 500A HRC fuse protecting a cable for short circuit with a 400A MCCB downstream protecting the cable from overload?

Hi all, anyone know of a good reference to australian standards with worked examples of sizing cables,switchboards,circuit breakers, fuses and calculating earth loop impedance for 415V distribution systems? Thanks in advance.

Hi Cuky2000, thanks for your reply, but I cant access the website link you provided. Also when calculating the allowable step and touch potentials do you have to consisder the layer of dry road base in between the asphalt and the 20 ohm meter soil and then calculate an average surface layer...

Hi I am trying to calculate the allowable step and touch voltages outside a substation given that the soils resistivity is 20 ohm meter and using a surface layer of both dry road base and asphalt. Does anyone have any experience with these calculations and what values of resistivity to use for...

Hello All, Anyone have a philosophy for earthing of ventilation ducts in high voltage indoor substations. Thanks

Hi ALL, Anyone have experience in using PVC insulated green/yellow annealed copper conductor as lightning downconductor on outside of multilevel indoor substation for lightning protection? Any issues that should be considered? Thanks

Hello All, Anyone know of specific requirments for installation of lightning protection downconductors(viz 120sqmm bare copper conductor) in concrete on their way to the buried earthgrid. Any feedback greatly appreciated.

HI, Currently designing a 110/11kV indoor GIS substation and the main earthgrid conductor has been calculated at 240sqmm. I am trying to find standards or information on how to size the earthing cables for earthing of gates, steel beams, columns, louvres etc located both inside and outside of...

Thanks Aleham, Can you help me i am in australia, where can I see nfpa780 and im not sure of the #2/0 awg? what does this mean. I am used to 37/2.03(120 sq mm) conductor size notation. Your assistance is greatly appreciated.

Hi All, Anyone have a good reference for designing cable ladder and cable support systems using unistrut components. Regards

Hi All, Anybody know of how to size lightning downconductors from lightning masted air terminals. Regards

Hi, Anyone know a good website that has good basic explaination of foxboro c50 rtu concepts, comms, programming etc. Thanks

Hi, Have a couple of questions regarding earthing materials: 1. Am CAD welding 120sqmm insulated earth conductor riser to 38x3mm Tinned Copper Strip. The ground where the earthgrid is being installed is close to river and wet. Anyone have any knowledge of the best way to seal the exposed...