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Rabert T

As an electrical engineer with 5 years of experience, I focus on transformer and circuit breaker reliability in 110/33-11kV and 33/11kV substations. I am a professional electrical engineer with experience in transformer service and maintenance. I understand electrical principles and have expertise troubleshooting, repairing, and maintaining transformers, circuit breakers, and testing them.
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Electrical How to

HT Transformer & DG Works BOQ with Checklist

A Bill of Quantities (BOQ) defines, quantifies & prices every component of work for an HT electrical installation.  This BOQ covers the 11 kV power intake, distribution transformers and diesel generator (DG) sets which is the core of any substation.  It serves as the binding technical...
Electrical Calculators

Earth Fault Loop Impedance Calculator

The Earth Fault Loop Impedance (EFLI) calculator is utilized to determine the maximum permissible earth fault loop impedance (Zs) of an electrical circuit.  Calculator Earth Fault Loop Impedance Calculator Uo, Nominal Phase Voltage (V) Circuit Breaker Size (A) Select Circuit Breaker Type Type B Type C Type D Breaker Characteristics: Type B → Ia...
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Protection

Restricted Earth Fault (REF) Relay – Working Principle, Diagram & Transformer Protection Guide

Restricted Earth Fault (REF) protection is a highly sensitive unit protection scheme that is...
Electrical Calculators

Transformer Fault Current Calculator

Calculator Understanding transformer fault current is one of the most important calculations in the field...
Electrical Notes & Articles

Difference between FAT and SAT

What is Factory Acceptance Testing (FAT)? Factory Acceptance Test (FAT) is conducted at the manufacturers...
Switchgear

Electrical Testing of Gas Insulated Switchgear (GIS) in High Voltage (HV) Substations

GIS Testing Electrical testing of (GIS) Gas Insulated Switchgear is essential for ensuring operational safety,...
Electrical How to

PLC-VFD-Motor Control System: Working Principle, Wiring, Procedure and Checklist

A Variable Frequency Drive (VFD) control system integrated with the Programmable Logic Controller (PLC)...
Electrical Interview

Electrical Maintenance Engineer Interview Questions and Answers

1). What is Preventive Maintenance? Preventive maintenance is the process of inspecting, testing and servicing...
Electrical Procedures

Dielectric Frequency Response Analysis (DFR / FRA) Testing of Power Transformers

What is DFR analysis in Dielectric Frequency Response? Dielectric Frequency Response Analysis (DFR) which is...
Electrical Calculators

Transmission Line Loss Calculator

Calculator 132kV Transmission Line Loss Calculator *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0;...
Electrical Calculators

AS/NZS 3008 Cable Size Calculator

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Transformers

Power Transformer Inspection at Site: Step-by-Step Procedure and Checklist

When a power transformer is set to arrive at site it is essential to...
Electrical Calculators

Electrical Parameter Calculator

Calculator Electrical Parameter...
Electric Motors

High Voltage (HV) Motor Megger Test Procedure

Insulation resistance (IR) testing commonly called a Megger test is an essential preventive maintenance...
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Electrical How to

HT Transformer & DG Works BOQ with Checklist

A Bill of Quantities (BOQ) defines, quantifies & prices every component of work for...
Electrical Calculators

Earth Fault Loop Impedance Calculator

The Earth Fault Loop Impedance (EFLI) calculator is utilized to determine the maximum permissible...
Electrical Calculators

Battery Sizing Calculator

A Battery Size Calculator is an important electrical engineering online calculator tool that assist...
Electrical Calculators

Electrostatic Capacitance Calculator

The Electrostatic Capacitance Calculator is an online calculator tool that enables instant conversion between...