Hannah

Hannah is the Administrator and Technical Content Coordinator at XBRELE. She oversees website structure, product documentation, and blog content across MV/HV switchgear, vacuum breakers, contactors, interrupters, and transformers. Her focus is delivering clear, reliable, and engineer-friendly information to support global customers in making confident technical and procurement decisions.

MV switchgear safety interlocks showing five-prevention logic with DSN lock and DXN voltage indicator

Safety Interlocks & Five-Prevention Logic (DSN/DXN) in MV Switchgear

What “Safety Interlocks” and “Five-Prevention” mean in MV switchgear A safety interlock in medium-voltage (MV) switchgear is an engineered permission…

Wall bushing vs through-wall insulator diagram for MV switchgear partitions

Wall Bushing vs Through-Wall Insulator (MV)

A wall bushing is an insulated primary-conductor feedthrough that carries a conductor through a grounded barrier (panel, partition, or tank…

XBRELE-style infographic cover explaining vacuum circuit breaker ratings kV A kA BIL TRV and Icw

VCB Ratings Explained: kV, A, kA, BIL, TRV & Icw (Vacuum Circuit Breaker Nameplate Guide)

Quick Takeaway (60 seconds) A safe VCB selection is not “kV + A”. You must validate insulation (kV class…

Feature illustration of an epoxy contact box showing insulated terminals, sealing, and key components

Epoxy Contact Box Basics: The Complete Practical Guide for Beginners (2025)

Hannah
December 21, 2025
switchgear parts knowledge, Vacuum circuit breaker knowledge

Last updated: 2026-12-21Reading time: ~10–12 minutesAudience: maintenance technicians, panel builders, electrical students, procurement engineersScope: LV–MV “fundamentals + selection + installation + inspection + troubleshooting”Safety…

How to read a transformer nameplate guide cover image showing a sample nameplate and key parameters like kVA, voltage, taps, impedance and BIL

How to Read a Transformer Nameplate: A Field-First Beginner’s Guide

Hannah
December 20, 2025
Power distribution transformer knowledge

⚡ Quick Takeaway (Field Reading Order) Read a transformer nameplate in the same order you make decisions on site: kVA…

A detailed XBRELE 3-phase power transformer in a modern substation, with subtle overlays illustrating vector group diagrams and winding connections, emphasizing its crucial role in grid integration and renewable energy systems for electrical engineering applications.

The Ultimate Technical Guide to 3-Phase Transformers: Connections, Vector Groups, and Grid Integration

Hannah
December 20, 2025
Power distribution transformer knowledge

Technical Level: Intermediate to Advanced Applicable Standards: IEC 60076, IEEE C57.12.00 1. Introduction: The Strategic Role of Transformers in Modern…