Dear forum folks,
We're doing a project where 15 kV EPR with a 5-mil tape shield was specified. A vendor has submitted that cable with a 3-mil tape shield.
Does anyone have any experience with the 3-mil wrap cable to suggest we stay away from it? Any opinions and recommendations are...
I'm working on a system that was originally installed in the late 60s or early 70s that has two 208V, 4000-amp Square D Power-Style switchboards with fused bolt-loc pressure switches (FBPS) as the service entrance devices. The gear is labeled: SUPPLY BUS BRACING 100kA on one piece of gear, and...
We are developing a design for the upgrade of a 40 year-old, 13.8 kV Emergency Power System.
The existing system consists of two (2) 3.25 MW, 13.8 kV diesel gensets. These sets energize fourteen (14) 13.8:0.48 kV substations throughout a campus-wide system. Genset operation is initiated by...
I'm coordinating an electrical system where a 1600 amp breaker controls six (6) K-rated dry-type transformers.
To simplify the problem, I'll say they are all 150 kVA.
The full-load amperage on a 150 kVA xf at 480 Volts ~ 180 amps. The inrush for a K-13 transformer can be as much as 15X.
Using a...
