The Main switchboard is 13.KV S&C Fusible disconnect switch with Source Transfer controller for Manual OR Automatic Transfer scheme
I have 13.8 KV Grounded - WYE Utility incoming Power on main distribution switchgear.
On site Generator is 480V/277V WYE Stepped up to 13.8KV using 480/277V...
We have a 2.5 MVA 13.8KV (Y-G)/ 480V (Y-G) Utility power supplying power to Schneider Electric 4000A, 480V, 3 Ph, 4W QED6 Main Switchboard with MTZ breakers.
Building major loads Panels and other DG Sources are connected to this Main switchboard bus with their respective breakers.
One of the...
I work in solar industry with carport canopy structure with pole mounted electrical equipment such as Solar inverters, AC combiner Panels with underground conduit risers at the canopy structural columns. The surface of these Carport is finished with asphalt. Bolt down Bollards are the cheapest...
My question is 2 part - for field installation electrical switchgear equipment multiple cubicle line up (Each cubicle typically 30 - 36 or 42 Inches wide + 90 in H X 54 in Depth weighing 1500-2000 lbs each.
If the switch mounting foundation floor is not prefectly levelled does manufacturers...
What is the acceptable Electrical installation practice for Medium voltage 13.8 KV Switch enclosure feeder cables conduit entering from the Side of the enclosure instead of bottom.
Please see attached Photo. The contractor installed the UG conduits for 13.8 KV Feeder about 18 Inches outside the...
Does anybody have noticed the use of Current limiting Fuse (CLF) does not change available short circuit current results on the load side of the fuse performing ETAP short circuit study but then what is the explanation for the CLF does reduce the Peak let through current and short circuit duty...
Available fault current at input terminals of VFD is 40KA where as VFD is rated 10KA. What is the solution to limit the fault current to VFD so it does not get destroyed in case of internal fault?
Per attached sketch I have 2 code related questions
1) GEN 1 (800KW) Main breaker is more than 25 FT from Gen output Terminals is this acceptable ?
2) When MTS has selected LOAD to be supplied from GEN 2 (350KW) THE GEN 2 power...
Do I need to put Breakers for 2 Separate Panel board feeders supplied from load side of Automatic transfer switch with Utility and Stand by generator sources the 2 Panel boards are within 25 Ft from Service entrance ATS (with Stand by generator source) and has their own main breakers as well...
My question is relating to the details of installation of outdoor MV (13.2KV) Fusible disconnect switchgear line up in an industrial facility. The Switchgear ground bar, mounting pad re-bars should they all be tied to 4/0 direct buried ground loop with ground rods at each corner of the pad along...
I have a situation with 2 PV systems each roughly 250KW and BESS (Battery Energy storage system) at customer site we are trying to connect to Utility grid. Would an utility approve such connections with Multiple points of disconnections ? Simplified one line in...
What is the grounding requirement per NFPA-NEC for Solar PV Panel mounted Car-port structures?
SPECIFIC QUESTIONS:
1) Do the Carport structural columns should be individually grounded with grounding conductors running
to ground rods...
I have a question about ANSI C37.20 - Switchgear standard and C57.12.70 Terminal marking for Power Transformers.
My Project involves a Low Voltage (480V, 2500A, 3 Phase) circuit breaker switchgear close coupled with a Power Transformer rated 2500KVA, 13.2KV/480V on the Right hand...
thread238-262723
https://www.eng-tips.com/viewthread.cfm?qid=262723#:~:text=Grounding%20an%20ungrounded,thread238%2D2
I just ran into this NOT so desirable 3750KVA, 34.5KV/480V Delta-Delta transformer. I have attached the transformer Nameplate and 480V Main switchboard Photos.
The Main...
Can anybody provide me the self learning link besides the hundreds of EV charging EVSE hardware makers like EVGo, Blink, Cgarging point and many states and local government Public CHarging stations installation guidelien for i) Commercial and Fleet EV Charging installation ii) Solar assist...
Is Ground counterpoise term used for Ground loop OR Ground ring provided around the perimeter of a structure to be protected from lightning strikes Provided with Air Terminals connected together with bare lightning conductor through which minimum 2 down conductors are run individually to a 3/4"...
thread238-215783
I have recently joined a government (DoD) engineering consulting firm (as Elec engineering role) who is involved in designing new and upgrade of fuel facilities handling petroleum fuels with outdoor canopy roof structures Flat roof, Gable roof etc calling for Lightning...
I am looking for on line ground fault locator for electrolytic cell line powered by 300 VDC, 45000 Amp rectifier used for chloro-Alkali process for separating Salt (NaCl) in to sodium and chloride. There are several cells in series with the salt in them and current passing through them. ThanKs
