Thanks waross ....
Here is the answer from EasyPower...
Yes, the Schneider Electric Sag Fighter Power Logic DVR-225-22-0B75-40 seems to be for voltage sag regulation. The EasyPower software does not have a specific equipment type that particularly supports this device.
As for arc flash, I...
A customer is installing these SAG Fighters in front of panelboards. The question is how do we model this in EasyPower power software ?
From the literature it's a Dynamic Voltage Restorer...
Thanks for the replies....realize this a real life situation. I've heard that is the excuse of the offender... There's so much stuff changing all the time - that it is hardly a place not subject to physical damage and therefore a Code violation. I have some sympathy for him - operator's of the...
No replies... I'm disappointed. I'm going to say it's my opinion that on an existing Plant site there are always hazards that you have to look out for.
They are supposed to do Job Safety Analysis (JSA's) before doing any work. If there is any chance you could hit something with your equipment-...
A guy at an established site (not new construction) got up in a mechanical lift doing some retrofit work, that goes on continuously at this site.
Many of the tray cables coming out of the elevated cable trays have only strain relief at the tray then onto their conduit that extends up from the...
Thanks for the reply... it's not just a disconnect - it's a fused disconnect right below the meter. So it is the Service and that cable going into the panel would be a feeder and the inside panel is a sub-panel. Yes one connection between the neutral and the ground - that is the main bonding...
A 200 Amp overhead service feeds an outdoor 200A fused disconnect on the outside of the house. Circa about 1960.
3 - #3/0 wires in metal conduit go from that disconnect, through the crawlspace 50', to a 200 Amp panel board in the middle of the house.
The conduit is bonded with a short piece of...
Oops.... The Client had guestimated 200V of voltage drop to where this hot switchover is located in the Plant. There is no metering at that point to confirm it.
Thus why we are trying to model it. But I input the data wrong on the original above. He told me the transformer tap is set to 4R...
We are trying to do a hot switchover of this 15kV bus that is fed from two different sources. I've tried to model it with EasyPower software.
According to the software there is a 400V difference between the one system and the other. Is there a problem doing this?
We have a 150 kVA dry type transformer that is a part of a bigger packaged unit. That question came up.
The transformer case will be bonded, there will be equipment grounding conductors run between the panel feeding it and the transformer.
Looking at the NEC 250.4 ... it doesn't appear this is...
Good info. These are new Basler digital relays that are replacing older digital relays, GE MDP type, that are discontinued.
The new relays kept the same settings and the same curves you would think. Basler was to replace in kind.
Basler provided the Client settings in a printout form of...
Basler provided printouts of their relay settings for new relays that replaced old ones in some old switchgear.
They specified E2 - IAC Extremely Inverse. EasyPower does not have that pick. It has: E2 - Extremely Inverse and C1 - IEC Extremely Inverse.
Note they specified IAC ... which isn't...
oops dealing with Basler on another model. I edited it to Schweitzer. Maintenance mode is a good idea - if it comes with that.
That's a good idea... specify the transformers with higher impedance to limit the fault current.
This project was a part of a purchase of a large portion of an...
Thanks for the good answers. Sounds like the consensus is that he's not answering the question. Might be worth more investigation and contact Schweitzer to confirm.
Seems the brand new switchgear should have the quality of CTs installed for the application. The high arc flash occurs on the...
