Who Am I?


Ver Pangonilo

We provide safe, reliable and sustainable Energy Solutions

Summary of Qualifications

Professional Registrations
Philippines: Professional Electrical Engineer (First Placer – April 1991)
Australia: Registered Professional Engineer of Queensland (RPEQ)
Professional Memberships
— Institute of Integrated Electrical Engineers (Philippines) – Life Member No. 23633
— IEEE Member No. 90438137 - IEEE Power & Energy Society
B.Sc (Eng) Electrical, 1983 - Saint Louis University
Baguio City, Philippines
Specialist Courses
— Hazardous Area Classification Certificate No. CT04248 (Australia)
UEENEEM015B Classify hazardous areas
UEENEEM016B Design electrical installations in hazardous areas
UEENEEM017B Design explosion-protected electrical system
In partial completion of UEE61207 - Advanced Diploma of Engineering - Explosion protection
Training and Seminnars
— ISO 9001:2015 - Understanding and Requirements Implementation
— Effective Risk Management
— Task Risk Assessment


Core Competencies

Concept definition, front-end engineering (FEED) and detail design engineering
— Equipment specification, selection, procurement, installation and commissioning
— Power distribution, earthing, lighting and lightning protection design
Procurement, project management and construction management
— Purchase requisitions and technical bid evaluations
Power System Design
— Power system modelling(ETAP, SKM Power Tools, PowerCad)
— Electric Power Distribution for Industrial and Commercial Facilities
— Short-ciruit Calculation and Protection Coordination
— Calculations for equipment selection
— Earthing (grounding) and lightning protection
— Lighting design
Commissioning, maintenance, estimating and construction
— Capital Expenditure (CAPEX) estimating
Hazardous area design and installation
— Upstream and downstream oil & gas facilities, refineries and process plants
— Offshore platforms, floating production storage and offloading (FPSO)
— LNG pipelines, bulk water transmission pipeline
— Tunnel/underground facilities installations
Water pumping stations, water treatment & sewage plants

Latest Blog


Time-Current Curve

Calculating Flash Protection Boundary Distances

In NFPA 70E, the short-circuit symmetrical ampacity from a bolted 3-phase fault at the transformer terminals is calculated with the following formula: [pmath]I_{sc} = {{MVA_{Base} * 10^6} / {sqrt{3}*V}} * {100 / %Z}[/pmath] where Isc = Amperes, V = Volts, %Z = transformer MVA. A typical value for the maximum power (in MW) in a 3-phase arc can be calculated using the...

Effects of harmonics on Electrical Equipment

Harmonic distort the fundamental frequency of the mains voltage waveform which affects the performance of other electrical equipment and creates additional losses and heating. A total harmonic voltage distortion of 2.5% can cause an additional temperature rise of 4 deg.C in induction motors. In cases where resonance can occur between the system capacitance and reactance at harmonic frequencies, voltage distortion...

Resistance of a Single Earth Electrode

earth_rod The resistance of a single earth can be calculated if the soil resistivity is known. An earth rod driven vertically, the electrode resistance can be calculated using the following formula. image001 where: R = electrode resistance, Ω ρ = Soil resistivity, Ω-m L = Length of electrode buried...

Greenfield and Brownfield Projects

People who have been involved in project implementation may know what "Greenfield" and "Brownfield" projects mean. Prior to being employed by EPCM companies, I never knew what these terms mean. Being a farm kid, the greenfield I knew was totally different from the greenfield I currently know. In project terms, the meaning of these terms are
Greenfield Project - A project...
Learn the basics


MVA Method

At this times where supercomputers could fit into a mobile phone and utility softwares are always available to do particular tasks, most Electrical Engineers tend to forget how to implement …


Short Circuit Study
What is a Short Circuit Study? A short circuit study calculates the short circuit capacity at designated locations within a...
MVA Method Short Circuit Calculation
A Short Circuit Study is an important tool in determining the ratings of electrical equipment to be installed...
MVA Method Load Flow Calculation
In previous tutorials for the MVA method, we have discussed the importance of Short Circuit Study, combining KVAs and...
MVA Method for 3-Winding Transformer
In previous tutorials, the examples provided were mostly for 2-winding transformers. In this tutorial, fault calculations for a 3-winding...
Complex MVA Method – Part 3
In Part 2, we have seen how to combine MVAs connected...
Complex MVA Method – Part 1
The normal MVA method, despite its simplicity, provides only an approximate solution to determine the fault levels in a...
Complex MVA Method – Part 2
After presenting the equations that we will be using for the Complex MVA Method in Complex MVA Method – Part 4
In Part 1, Part 2, and Part...
Short-circuit apparent power of the system
When doing power systems study, it always the predicament of Electrical Engineers where to get the values of the...
Combining KVAs
KVAs in series. The total KVAs in series (KVAtotal) is the reciprocal sum or inverse sum of all series...

Cable Selection

Cable Selection – Single Phase Earth Conductor Sizes Fault Loop Impedance High Voltage Cable Selection – Underground


Cable Selection – Single Phase
Note: This will be the first of a series of tutorials for the selection of cables. The objective of this...
Fault Loop Impedance
Note: This is the second part of a series of tutorials for cable selection. We have done cable selection based...
Cables Selection for Motors
When selecting a suitable cable size for a motor, there are more parameters to consider than when selecting cables...
High Voltage Underground Cable Selection
Unlike the other Cable Selection tutorials which deals with low voltage (LV) cables,...
Earthing Conductor Sizes
The following table lists the recommended minimum sizes of earthing conductors. Note: This serves only as a guide, calculations are...
Arc Flash Hazards
It's not too long ago that arc flash hazards has become an important part of electrical design. More clients...
IEEE 1584 Arc Flash Calculations
IEEE 1584 provides empirical formulas for determining arcing fault current, flash protection boundaries, and incident energy. The formulas are...
Time-Current Curves Using Excel – Part 1
In these articles, I have discussed the methodology on how to create time-current curves using excel.
  1. Creating Coordination Curves...
Time-Current Curves
Discrimination & coordination using Time-Current Curves
  1. TC Curves Part 1 - Introduction
  2. TC Curves...
Time-Current Curve Part 2 – Discrimination
In Part 1, I have discussed the basics of using excel in plotting time-current curves. In this tutorial,...
Voltage Drop Calculation
This article provides a guideline on the selection of electrical cables. Cable selection is an important part of electrical installation...
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