is a coordination study required at 120V?
I never seen a coordination study done on a 120V lighting panel or 120V control panel.
My Reviewing Engineer is asking for one on my control panel which is all 120V, and all the same 1489 circuit breaker type just with different amperage.
I believe the...
I have never been asked to do a coordination study on my PLC Control panel.
I'm using various amperage of the same Allen Bradley Breakers
1489-A1D020 - 2 Amp
1489-A1D030 - 3 Amp
1489-A1D050 - 5 Amp
1489-A1D200 - 20 Amp
These breakers feed power to I/O module,Power Supplies, and various...
I'm trying to find the formula for the inflow rate or outflow rate of a cylinder tank knowing the Volume.
Look online and did not find much literature. Flowrate units should be Gal/Min.
One of my clients want me to Hi-POT my PLC Control Panel per their specification.
I have never been requested this before on a PLC Panel. I'm pretty sure a Hi-POT
will damage Electronic Equipment in the panel.
Has Anyone done this before? Do you have to unterminate every wire end to end
to do...
Is there a boundary that Arc Flash Labeling is exempt, like anything under 240V. In NFPA 70E 2012 it stated anything under 240 V was exempt from labeling, but this was removed in the 2015 edition. Is there another document/standard that can shed any light?
When you print Arc Flash Labels it's typically in the Normal/Utility configuration?
In my project I also have Standby Generator as well. I don't think they would want
two Arc Flash labels.
Ronne
I have designed a simple control panel that has an internal heat load of 199 Watts.
Its a 72x36x24 Hoffman Enclosure. This control panel is in a temperature controlled
building. None the less the specification is requiring me to do a heat load calculation
with an environment temp of 50°C. All...
I have conducted an arc flash analysis in Etap 14.1.
I'm getting a warning message that states "Exceeds Max. PPE Arc Rating"
I believe this is due to my bolted fault current or Ia (Arc Current) of 2.9KA.
I have a LV (480VAC) Main CB Cutler and Hammer KD Series Breaker, with a Trip Device Part #...
