A couple of questions to be sure we understand what you're asking:
1) Is the filter acting on the drive output (between drive and motor, for example) or on the drive input (between drive and utility, for example)?
2) How much load (current) is being applied - both in actual amperes and in per...
Subtransient reactance impacts the ability of a generator to work as much like a utility as possible so system loads can work normally when running on a generator set. The objective of an alternator selection process is to get as close to a utility capability as possible. From a generator...
The value of the correction is dependent on load. If your caps are on (with welder and/or grinder operating), the utility sees a "corrected" power factor close to unity (but still lagging). If the caps are disconnected and the machines are operating, the utility sees the actual lagging power...
To program Alstom relays, you typically use Alstom's Micom software, which allows you to configure the relay's settings, protection functions, and communication parameters.
In other words, unless you have the (more or less) proprietary Micom software, you cannot directly configure the default...
As part of the tailoring process, you might want to quantify how good your solutions were for a given issue. As an example - the very first "task" in the most recent job states that you were involved in coordinating internal material specifications with current industry standards and that you...
All your listed equipment manufacturers in the original post are Japanese or Chinese. I would start by seeing what the Japanese national standard (JIS) documents have to say about naming conventions for rotating electric machines.
Just took a peek at the Ningo Bo website. It would appear that...
In my experience, it is not time in service that equates to a specific title - with the exception of EIT (engineer in training). If applied for, an engineering student can become an EIT by first passing the FE (Fundamentals of Engineering) exam, then entering the workforce in an engineering...
Most non-North American manufacturers use the IEC standards as their basis, with some national exceptions/additions. The Japanese have their own national standards (JIS) that are more-or-less based on the IEC standard now in effect.
The "280" designation referred to by the OP is a dimension...
Not sure - but the AHJ might be a bit sticky on remote lockout because the requirement is for BOTH lock out AND tag out. That typically means a tag co-located with the lock - regardless of whether there is another tag at the "user" end of the line (near the equipment, or in this case the...
The air pressure requirement is going to depend (a LOT) on the kind of snow and the amount of snow. Think about how hard it is to move wet leaves vs dry leaves - or small branches, instead of dry twigs. Snow can be fairly deep, and wet, and sometimes covered in ice (either from melt or from...
From what I have encountered, the biggest difference between being an engineer with this type of background while engaged in EPC activities vs as a "site" engineer is that the EPC is focused on getting bits and pieces to show up on time and - hopefully - work together long enough to get off the...
I have to assume you did not order the machines yesterday, based on your expected delivery time frame.
What should have happened is that you receive at least TWO items of documentation well before the machines are expected to show up (usually no more than 4 weeks after the order was received by...
Chocolatecat:
Synchronous speed is found using the following relationship (for AC machines ONLY):
(synch speed in RPM) = 120 x (input frequency of current waveform, in hertz) / (number of poles)
Asynchronous machines - which means both squirrel cage and wound rotor induction designs - tend to...
Depends on the voltage rating.
For machines over 1000 V, typical connection is to have bus bar drilled for each phase (or polarity, if it's DC).
For connections to lower-voltage devices/equipment, it varies widely. Most reputable manufacturers use terminal blocks for sensors, etc. but perhaps...
Hmm. OP indicates some vibration during acceleration, but more during deceleration. Is the interval the same - or does deceleration take a lot longer (i.e. a coast-down approach)? Might be as simple as sitting on (or at least near) the system resonant frequency longer during the deceleration...
IEC requires separate runs for certain voltage breakpoints. However, everything I've been able to track down (which isn't all; there is, by a long shot) has no real hard stance on anything below 1000 V. However, knowing what we do *now, vs back in the early 1970s) about how harmonic content and...
There is a difference between "new construction" and "refurbishing / replacing existing equipment". Yes, new construction requires ALL those things, because modern homes have a high proportion of electrical load compared to homes built before 1980. As it happens, even an "old" (e.g. 1980s...
I take it you've already researched the "basic" properties of the material.
https://www.specialmetals.com/documents/technical-bulletins/waspoloy.pdf
Maybe graph the known data and see where the curve falls at the desired temperature condition?
Resistivity of copper (and copper alloys) and aluminum are all different. The resistivity of the circuit has an effect on the development of torque and therefore the ability to accelerate a mechanical load. More resistance means more (starting) torque - but a flatter torque capability curve...
In my experience, unless you have a VERY narrow field of application you aren't going to be effective with just the knowledge imparted by one branch of engineering. For example: most of my career has been spent designing, manufacturing, testing, and troubleshooting rotating electrical machines...
