Ver Pangonilo, PEE RPEQ

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Arc Flash – Calculating Arcing Current

Arcing current is used to calculate the incident energy from an arc flash. The predicted three-phase arcing current, which is lower than the bolt fault current, must be determined so that operating time for protective…

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Philippine Electrical Code – Accessibility and emergency exit facilities

The provisions of the Philippine Electrical Code do not clearly state the requirements for accessibility and emergency exits around switchboards or switchboard doors. The PEC have two (2) clauses that provide the minimum requirements of…

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Philippine Electrical Code – Scope

The Philippine Electrical Code has two (2) parts. The scope of PEC 1 is defined in Section 1.0.1.2(a) while Philippine Electrical Code 2 (PEC 2), Section 1.1.2(b) states The PEC 2 covers utility facilities and…

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Philippine Electrical Code – Low Voltage

Low Voltage is mentioned many times in the Philippine Electrical Code (PEC). However, the PEC failed to explicitly include Low Voltage in the definition of terms. The purpose of the PEC, being a statutory document,…

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Philippine Electrical Code

Spaces About Electrical Equipment – Working Spaces

One of the most taken for granted provision of the Philippine Electrical Code is Section 1.10.2.1 Spaces About Electrical Equipment. It may have been that Electrical Design Engineers and Electrical Inspectors are not aware of…

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Tutorials

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 hand calculations, have already forgotten…

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Short Circuit Study
What is a Short Circuit Study? A short circuit...
MVA Method Short Circuit Calculation
A Short Circuit Study is an important tool in...
MVA Method Load Flow Calculation
In previous tutorials for the MVA method, we have...
MVA Method for 3-Winding Transformer
In previous tutorials, the examples provided were mostly for...
Complex MVA Method – Part 3
In Part 2, we have seen how to combine...
Complex MVA Method – Part 1
The normal MVA method, despite its simplicity, provides only...
Complex MVA Method – Part 2
After presenting the equations that we will be using...
Complex MVA Method – Part 4
In Part 1, Part 2, and Part 3 of...
Short-circuit apparent power of the system
When doing power systems study, it always the predicament...
Combining KVAs
KVAs in series. The total KVAs in series (KVAtotal)...

Cable Selection

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

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Cable Selection – Single Phase
Note: This will be the first of a series...
Fault Loop Impedance
Note: This is the second part of a series...
Cables Selection for Motors
When selecting a suitable cable size for a motor,...
High Voltage Underground Cable Selection
Unlike the other Cable Selection tutorials which deals with...
Earthing Conductor Sizes
The following table lists the recommended minimum sizes of...
Arc Flash Hazards
It's not too long ago that arc flash hazards...
IEEE 1584 Arc Flash Calculations
IEEE 1584 provides empirical formulas for determining arcing fault...
Time-Current Curves Using Excel – Part 1
In these articles, I have discussed the methodology on...
Time-Current Curves
Discrimination & coordination using Time-Current Curves TC Curves Part...
Time-Current Curve Part 2 – Discrimination
In Part 1, I have discussed the basics of...
Voltage Drop Calculation
This article provides a guideline on the selection of...

Profile

Ver Pangonilo

Ver Pangonilo, PEE RPEQ

A Registered Professional Engineer of Queensland (RPEQ), Professional Electrical Engineer (PEE – Philippines) and certified hazardous areas electrical designer with more than 20 years experience in concept definition, front-end engineering (FEED), HV & LV detail design, 3D model reviews, work share, construction and commissioning of Hazardous and Non-Hazardous Area electrical installations in water pipeline and pumping facilities, offshore platforms, FPSO, oil & gas process plants and pipelines including related facilities; experience in instrumentation and control, hazardous area classification for explosive gas and combustible dust atmospheres including intrinsically safe calculations and Computerised Maintenance Management Systems (CMMS).
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