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Hi every one, In our substation, the route of the HV power cable is through trench and pipe ducts. Pipe ducts consititute 25% of the route. For Cable calculations, how should we consider the laying method of the cable. Trench, Pipe duct or the worst of both. Or we do the calculation...

Hi every one. I am getting confused with the current division factor Sf for system design and the split factor for buried mesh. Can anyone shed some light on it with some references. Many thanks for your time.

Hi guys, Melting point of Tin = 203 Melting point of Cu = 1083 For earthing calculation purpose, when considering tinned-copper wire, can we take 203 degree as the maximum allowable temperature, being on safe side as the MP of Cu is high enough to sustain this temperature. Thanks for helpful...

Apart from the standard NGR sizing calculation, do we need to take account the effeect of temperature on NGR sizing as well. Thanks if someone can guide me to calculate this factor.

Hi everyone, We are doing the earthing calculation for 33/6.3kV SS. There are 2 nos. 33/6.3kV , 30MVA transformer Dyn11. For calculating the maximum grid current, should we consider - Maximum switchgear fault current 0r - Transformer 3 phase fault current at Y side thanks for helpful replies.

Hi guys, We are providing control system for one station in Qatar. In our system we have one HMI computer with two screens. The desktop is extended to both screen. I have installed a snapshot tool (MV Snap) to capture the whole desktop, however, while capturing the complete desktop, it...

Can anybody tell me, how to calculate the magnetising current for Class 'PS' or 'X' CTs. Required formulae are available for calculating the knee point voltage in the Relay catalogue. But none of the catalogue describes about the magnetising current requirement. I feel the magnetising current...

hi, Can anybody tell me that is it possible to configure KVGC relay to block RAISE & LOWER commands BOTH for overvoltage conditions? For undervoltage, there is highset element for blocking both commands but can we have the same blocking option for overvoltage? thanks in advance.