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Hmm. General statement is that the "off-the shelf" machine is mechanically designed to handle either 20 or 25% above top nameplate speed without coming apart and injuring someone. The limit is dependent on the governing design standards (IEC = 20%, NEMA = 25%). What this means is that there is...

Just noticed something else from the OP's post. ... if harmonic currents flowing into the cables are 7%, this will be 107% total current (60 HZ + non-linear currents) and the cable sized to maintain 125% with de-rating should be able to withstand it... Yes - and no. It depends on the frequency...

As a minimum - yes, you should have a good grasp on all those topics. You should also think about details on what electrical or mechanical processes or equipment the control and automation is supposed to handle - like electrical protection devices, compressors, fans, motion circuits (cranes...

Consensus standards (IEEE, IEC, etc.) and national standards (NEC, CSA, BS, etc.) do not identify minimum OR maximum longevity requirements. If such a measurement/requirement exists, it is set by an end user for a specific application. That being said - as an OEM for rotating machines, I have...

@OP Most of the (large) machine manufacturers - which means anything that fall into the electro-magnetic category - is expecting harmonic content equivalent to that allowed on a utility. That means - at worst - the IEEE 519 values. This is INDPENDENT of where the equipment is located on the...

What the formula is telling you is that the square of the PER UNIT CURRENT (I) multiplied by the TIME IN SECONDS (t) is a constant. This is for determining relative thermal stress by indirectly calculating the amount of heat introduced into the winding. For example: the nameplate reads some...

@Nick: If the system operates in "single pass" mode, exit temperature may still be constrained. For example, putting too much heat into a local environmental area such as a stream or lake (and thereby killing all the fish). Minimum allowed temperature rise (of the liquid coolant) corresponds to...

IP 66 is protection from (high pressure) water jet. IP 68 is protection from (continuous) immersion in depths above 1 m ... although typically limited to a max of 3 m. If you need to operate successfully at more than 3m depth - be sure to specify HOW DEEP and have the devices tested...

OP: The liquid coolant differential is dependent on a couple of things. First - how much differential can the overall system take? What I mean is - is the system recirculating, such that the "hot" liquid from this part of the process becomes the "cold" liquid for the next part? If so, chances...

Insufficient flow = higher temperature rise in coolant (more time exposed to heat) Insufficient pressure = higher temperature rise in coolant (more time exposed to heat) External factors which may limit allowable coolant differential between "in" and "out": 1) whether the system recirculates...

Putting the search string into a favorite search engine yields About 1,610,000 results. The very first one is the primary manufacturer of the specific cable. Converting energy to motion for more than half a century

One form of a "self-locking" nut is to use a heat-stretched stud and nut assembly. In that case, the stud DOES NOT protrude through the nut. Applied torque is determined by the elongation of the stud itself. Converting energy to motion for more than half a century

As someone who is an "experiential" learner and who uses a number of analytical tools (not HydroCAD, as I'm not a Civil engineer), I can understand where you're coming from, Megan. However, the best way to get experience is by doing - so read the paperwork, follow along through the case study...

In my opinion: The production of electric power (by traditional generation or other means) is a service. The delivery of electric power (to a load) considers that the delivered material (electric power) is a product. If something is sold (such as power from a rotating machine, piezoelectric...

A filter is used to "clean up" harmonic content. The fact that it is between the upstream transformer secondary and the "point of common coupling" (PCC) might indicate it it there to prevent downstream harmonics from back-feeding to the transformer primary side - or it might be to keep the...

@OP: It all comes down to where you want to find any problems. NONE of the testing is a requirement - unless your bid document makes it so. That being said, there are certain test criteria that are strongly recommended to enhance both safety and performance. Personally - 1) do the factory...

First - I think the specification should read "There should be provisions for continuous monitoring of the brushless exciter stator and exciter rotor winding insulation resistance...". Note that the way the specification is worded (or at least the excerpt supplied by the OP), it is unclear...

All the steps: 1) Check that all the necessary "required to run" auxiliaries are powered up and doing what they should (i.e. fans moving air, pumps pumping fluid, etc.). 2) If the excitation circuit requires an external power source (e.g. the nameplate reads excitation requirements as something...

Did you actually try contacting Basler directly? https://www.basler.com/ Since we don't know where you are in the world, click on the "Contact" pulldown menu in the upper right of the webpage and enter the appropriate data. Converting energy to motion for more than half a century

There is a big difference between "rotating" and "static" equipment. See following link. https://www.petrosync.com/blog/what-is-static-equipment/ In short, the "static" engineer requires knowledge of: a) materials science/properties, b) design principles (of static equipment), c) inspection...