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Thanks you very much. According to the calcualtion of EDSA, starting time is about 3.47s, voltage drop 6%. The motor is 60kgm2, the load is 6kgm2. Aanother question regarding the starting time, In my mind, it is related with starting torque, the bigger the quicker. But I met a problem about...

System 11KV 50KA 3Sec; 60MVA 132/11KV transformer; Exsiting 11KV load 7.9MW, Motor 11KV,2950MW,2990rmn, LFA=6.2In, power factor 20%, locked torque =0.47TN, whether and how long the motor could be started?

CLient requires us to design the CP system with deepwell groundbed for one 24'' underground pipeline with 39km long and 3PE coating. The project location is in African desert with very high gound level soil resistivity of aroud 500 ohm(7.5m deep). As my understanding, we have to drill a test...

CLient requires us to design the CP system with deepwell groundbed for one 24'' underground pipeline with 39km long and 3PE coating. The project location is in African desert with very high gound level soil resistivity of aroud 500 ohm(7.5m deep). As my understanding, we have to drill a test...

Could anybody tell me what is the exact meaning of load moment of inertia? And what is the weighting factor?

If there is expert on the ACSR , the code ACSR standard BS EN 50189, I want to know the grade of steel code "GIA" , what the exactly meaning of it?

Hi BigInch, Thanks for your reply. My point is that is it a normal practice for manufacturer that applied the coating? Thanks

The Client Specification requires that laboratory test of Resistance to Abrasion (the loss of weight that shall not exceed 10 mg/1000 turns) be applied to 3PE coating for 24'' pipline. Is the above test a regular practice because it sounds strange to me? The pipeline is normal underground ...

Could anyone help me know what International or Industy Standard should be applied for FBE coating in terms of shop application and testing? 400um FBE coating is specified for underground bends in our Libya project. Thanks. David

Hi Steve Jones, Sorry for the mistake. It is not 3pe coated. It is only normal painting for above ground pipe, such as FBE. The pipeline is for water transfer. So the design temp is 75 rather than 95. Thanks. David

Water Injection pipeline about 8 km Design Pressure 139 Bar, above ground. Solar radiation temp 95 c.degree, design temp 75 c.degree. Peoject Spec for Line pipe, APL 5L X52 PSL 2, WT 17.5mm. 3PE coating. However, only APL 5L X52 PSL 1 is market available. Could PSL 1 be alternative to PLS 2...