Bolts for Bus bar Connections 5 - Eng-Tips
2006年5月24日 · We are having several different opinions regarding Bolts used for Busbar connections of MV Cables as well as motor terminations in drawer compartments. Since we are working in Europe. Client maintains we should use 8.8 which is a metric medium carbon steel type bolts 120000psi along with...
Bus Bar Current Ratings 3 - Eng-Tips
2008年11月9日 · UL508A specifies that bus bar should be copper and at most carry 1000A/square inch. Also, insulators/supports must be 90C rated. Now, you can build a minimum buss to support whatever current you want and use it if you do temperature rise testing.
Performing "retorque" of bolted electrical bus connections - Eng …
2001年12月27日 · The values your connections are to be torqued to ussually are found in the mfgs manuals. Over torquing can also smash the connection deforming the copper, worsening the condition as well. Before thermal imaging annual torquing of the bus connections was a common practice. Just make sure they use a torque wrench.
Alloy 110 Copper bus bar corrosion - Corrosion engineering - Eng …
2004年5月11日 · We have been using alloy 110 copper for a ground bus bar in some of our equipment. In this case, the bus bar is drilled and tapped, and all the ground wiring in the cabinet lands at the bus bar. We currently have 24 wires, each with a separate AMP ring lug. This ties all the assorted ground circuitry to a single point.
Space heaters in low voltage motor conduit box - Eng-Tips
2011年1月3日 · For LV motors, both items sound excessive to me (bus bar connections and term box space heaters). I'm not sure what is the connection between bus bar connections that would increase necessity for space heaters.. 1 - Insulator which may become damp? I wouldn't think at 480vac that would be a big problem. 2 - Larger term box?
USE OF SPRING WASHERS ON ELECTRICAL CONNECTIONS 4
2009年8月27日 · Manufacturers and field installations seem to differ on the this. When using a a current carrying electrical connection such as bolting a commpression lug to a busbar or busbar to busbar, what is best connection method?
Wind Turbine Aluminum Bus Bar Bonding - Eng-Tips
2014年1月27日 · We had a turbine in one of our wind farms whose aluminum hollow conductor running down the main shaft to the converter burn at the point of bonding. Since this aluminum bus bar is identical to those found in substations, I wanted to know if there is a standard and common practice/methodology on how aluminum bus bars are to be bonded.
Bus bar protection commissioning - Electric power & transmission ...
2006年5月23日 · If you have a ring set up and isolators between the coupler and the bus then you could isolate the bus coupler under test from the isolator. We used to do breaker testing before connecting the flexible busbars to the busbar and then use the busbar outage to …
MV Switchgear Ground Bus Connections to Ground Grid
2004年6月21日 · The Canadian Electrical Code specifies a Minimum of 250 MCM for grounding equipment fed by 2000 Amp bus bars. (The Canadian Electrical Code specifies a Minimum of 1/0 for grounding equipment fed by 2000 Amp cables.) I hope that each generator is also grounded, the size of grounding conductor determined by the Ampacity of the generator feeder.
Performing "retorque" of bolted electrical bus connections
2006年7月28日 · Every 2-6 years retorque all bus duct terminations, bus duct taps (usually fused disconnects), and assembly hardware according to manufacturer specifications. This must be performed only by a competent electrical contractor working under …