2026-09-21

Ask two engineers what a current transformer is and you will hear two answers that sound different but mean the same thing. One describes the meter t...

2026-09-18

Stand outside the fence of a medium or high voltage substation and you will see a collection of steel, porcelain and copper that looks complicated at...

2026-09-11

A circuit breaker does only half of its job if nobody knows which position it is in. The primary contacts carry the load current and interrupt faults...

2026-09-04

When a 2500 kVA transformer's main breaker trips during start-up of a 400 kW motor, the usual response is to call for a bigger breaker. The breaker, ...

2026-08-28

Pull a tripped molded-case breaker out of a panel and you will often find soot or discoloration around the contacts. That alone does not mean the bre...

2026-08-19

Air insulated switchgear (AIS) is the backbone of many medium-voltage distribution systems because it does not rely on special gases or complicated e...

2026-08-14

Stand in front of a 33 kV switchgear panel, and the voltage display tells you the busbar is at 33,000 V. The meter never touches that busbar. A compac...

2026-08-07

Ask five electrical engineers why a plant paid a low-power-factor penalty, and you will get five slightly different explanations. The common cause is ...

2026-07-29

What Does VCB Mean? A Multi-Context Breakdown A substation engineer asks for a "VCB retrofit," a bank compliance officer investigates a "VCB fee," an...