Nitrogen Flow Calculation - CR4 Discussion Thread - GlobalSpec
2017年5月10日 · Nitrogen flowing out of the end of a piece of pipe isn't doing anything useful. Depending on the length of pipe, the velocity out of the end could approach the speed of sound at [pressure, temperature], though it certainly cannot exceed it.
Flash in Dry Type Transformer - CR4 Discussion Thread
2011年10月21日 · 04) You are after a wild goose chase. 05) Again you are after a wild goose chase. Bottom line is that the protection relay is there to isolate the T/F in case of fault, if the relays are accurately set, battery power sourcing is healthy to activate the relay and trip coil circuit of CB is functional the unit should not have melted.
Busbar Colour Turn to Black - CR4 Discussion Thread - GlobalSpec
2011年9月7日 · since the rat is dead shall we start a wild goose chase now? or look for the black cat in the dark room after it has gone away? now lets get in the question mode . . . the problem was first observed after you changed from ship supply to shore supply? ie was the problem there already earlier on? or did it really happen during or after the ...
Out of Roundness After Cut-Off Using Lathe Machine
2012年3月12日 · The out of roundness is caused by the stock removal to create the shape removing the straightening stresses imparted when the product was straightened as a bar. Your description of this as s tube was incorrect, leading all of us on a …
Shape of Electrolytic Capacitors - CR4 Discussion Thread
2020年9月25日 · I am pretty sure this is a wild goose chase. Many people much smarter than me are constantly searching for better ways to increase contact area and capacity/vs board space. I will just pursue other ventures. Thanks for all the feedback from everyone.! Exit(0) _____
Wind Load Calculation Formula for a Communications Cabinet?
2007年10月8日 · Greetings, I need to place a communications cabinet on the roof of our office and need a wind load calculation.
Axial Flow Fan - CR4 Discussion Thread - GlobalSpec
2010年12月19日 · i used the following formula for the air flow rate: Flow Rate = Q = Vd*Nb*Nr*60. Q = flow rate in (m3/hr) where Vd = volume of air displaced by single blade during one rotation. this is the volume i have taken as the volume equal to the volume of cylinder constructed by rotating that blade in 360 degree.
Overheating Power Cables - CR4 Discussion Thread
2008年4月1日 · that's not due to the vertical or horizontal position of the cables. first of all whether all the thimbles are properly crimped and whether all the nuts and bolts fixing the thimbles to the breaker are tightened properly. then check whether the load of all the phases is equally distributed. on of the probable reason for the cable getting overheated can be exessive load …
230V as grid voltage - CR4 Discussion Thread - GlobalSpec
2008年2月3日 · Many times in the past I have been led on a wild goose chase by overly sensitive DMM's only to have the problem solved with a simple wiggy. I am leery of toolbelt true RMS meters for reading voltage other than output voltage from a VFD or similar device (or at least when other equipment generating non-sinusoidal waveforms is on the same panel).
Diesel Generators and Synchronization Problems
2009年6月10日 · Check the AVR, exciter system, PTs, CTs and protection relays. Loss of excitation and metering problems can also cause reverse power trips. The problem could be and probably is intermittent. Been there chased that goose! Got pinched and wing whipped a few times too! TT3 _____