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Gen Transformer voltage is 13.8KV Delta so are you suggesting use 13.8KV /120V PTs connect them Y/Y-G? or Delta/Y-G?

Thank you waross for your response, but the Generator is quite far from the switchgear, voltage drop will be an issue.

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...

1) jghrist - Neutral and ground are bonded only 1 place at transformer not at BESS 2) che12345 - Thanks for detail response! 2) a) The 1600A frame breaker has 800A Sensor plug and Ground fault pick up setting is 160A verfied. Upon trip breaker indicates reason for trip is Ground...

We already discussed this with BESS system manufacturer the quality of output from inverter supply is tightly monitors before the inverter is connected to Power system.

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...

Thank you all for your attention to my quesries and attempts for your best responses I think Milkshakelake's response works the best in my situation.

To all my learned colleague uninamously rejected Bolt-down bollards on asphalt surface. What is your opinion of using Pour in Place Bollard would that give better protection for pole mounted equipment as described...

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...

Thanks colleagues for your aanswers - The size of cable is 3#1/0 + GND in 4 "C I thought using LBs would solve the issue of bending radius. Once we use LBs The cable is 15KV, M105, Unshilded. Any comments?

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...

Che - so are you saying Schneider Elec solution to mitigate VFD SCCR rating of adding line reactors or current limiting fuses is not correct?

Dave thanks for the suggestions. I saw Schneider Electric specifies Current limiting fuses or line reactors specific to each of their drives - I am not sure Rockwell international or other US drive manufacturers provide such recommendations...

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...

Thermionics - Thanks for your response. These are definitely 13.2KV manual disconnect switchgear line up. The inverters are IEEE 1547 certified - stops if Utility power is lost.