I am due to design a full Circadian Rhythms Illumination System within a Human Behaviour and Sleep Disorders Researching Center in UK, and I have been tasked the duty to investigate the market for a full spectrum Driver / LED / Luminaire that would offer a continuous tuning of the spectrum from...
Hi to all.
I have a question that maybe simple for some of you guys.
I have to supply a transformer with a cable (primary) sized for three loads (secondary) of 150KVA two-phases resistances @ 400Vac phase-to-phase.
What will be the resulting, effective load on the Primary, as to size the...
Hi to all.
I have a simple question that may have a complicated answer: when testing a three phase Circuit Breaker with a single phase Current Injector, what will happen if the test is carried out only on one pole (line-in/line-out). I am presently far away from a laboratory and I cannot carry...
Hi to all.
I am presently involved in a project where lot of RTD's (Resistance Thermal Devices) are installed on field equipment, particularly on transformers and electrical motors windings.
As I am preparing the Cable List for the whole field, is there any specific requirement for the cables...
Hi to all.
I have an issue on the earthing (or grounding) at the secondary of Current transformers.
Generally speaking, the Primary of a Current Transformer is marked P1 and P2, with P1 normally being positioned where the Current enter the Transformer and P2 at the exit. Accordingly, S1 (or...
Hello there.
Is anybody aware of the latest Graphic Symbols for Schematic Diagrams and drawings from the British Standards?
I looked in several Standards Libraries but I cannot find the relevant Standard Number.
I would just need the Standard Number (current one) or the proper denomination...
Hi to all.
I wonder if anyone there has a "rule of thumb" to calculate the Heat generated by a Panelboard.
I can't remember the formulas and I am presently out of books reach...!
Thanks to whomever wishes to help.
Giuseppe
