Question: I am wondering why the bases of the large wind turbines I toured recently had something like 64 large, "left hand" thread bolts in the base. The tour guide did not know, but he did say they were torqued to something like 2000 lbs. Why the '"left hand threads?
Thanks,
George
Hi,
I spent a week recently at an industrial facility in a desert climate, and dust penetration into rotating equipment was stated by staff to have been a bit of a challenge. Multistage filters are used, but with frequent dust storms become reduced/plugged relatively rapidly. (There is a...
I am wondering if any forum members can share their knowledge on this subject? There was a lot of discussion on VFD spikes/mitigation recently in thread titled "Terminator networks for VFD" Can these spikes create enough electric stress to generate ozone in a low voltage induction motor?
I have a 2 pole T network, as a high pass. The network feeds a Dc biased Schottky diode that is acting as the RF burst detector. These RF bursts are generated as transients due to sparking activity, generated by high voltage spikes.
For detection purposes, It is working very well, but sometimes...
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...
Briefly: How common are 6 and 8 pole DC machines? The rail transit propulsion motors I have worked with are 4 poles, and I have heard of 6 pole DC (never actually seen), but before a conversation with a client today - I had never even heard of 8 pole.
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I have a situation with a brand new 1/2HP 3Phase 230/460Vac TEFC motor. (Baldor M3538 frame 56 1725RPM class B etc.)
I installed the motor, wired up the terminals for 460VAC - double and triple checked them in fact.
This little motor is running hot, in fact it is getting so hot that it prompted...
