@evgeniikonkin

The Busbar Sizing Mistake That Starts With “It Can Carry the Amps”

5d ago · 5 min read · Busbar sizing often gets treated like a simple ampacity question. Can the copper carry 800 A?Can it fit in the panel?Does the bar look large enough compared with what we used last time? That kind of t

The Inductor Energy Mistake That Makes Power Designs Look Safer Than They Are

May 26 · 5 min read · Inductor energy storage looks like a small detail until a converter switches, a fault occurs, or current is interrupted faster than expected. That is when the stored magnetic energy has to go somewher

The Harmonic Filter Mistake That Can Turn a Fix Into a Resonance Problem

May 25 · 5 min read · Harmonic filters are usually installed to solve a power quality problem. But if the filter is tuned to the wrong frequency, it can become part of the problem instead of the solution. That is why passi

Relay Coordination Fails When You Check Only One Fault Current

May 23 · 7 min read · Relay coordination is supposed to make a fault trip the closest protective device first. That sounds simple. A downstream relay should clear the fault. The upstream relay should wait long enough to ac

The PT Ratio Mistake That Can Break Metering Before Commissioning Starts

May 22 · 6 min read · PT and VT selection looks like a simple ratio problem. That is why it gets underestimated. Someone sees a 13.8 kV system, assumes a 120 V secondary, divides one number by the other, and moves on. The