- protection coordination consulting services - in Indonesia - protection coordination consulting service - in Asia - protection coordination consulting services - in South East Asia - prominent protection coordination consulting service - effective protection coordination consultancy service - efficient - protection coordination consultancy services - inrush current - what is protection coordination according to IEC standard - and what is protection coordination according to IEEE standard - relay protection - industrial protection coordination evaluation - building - protection coordination studies - chemical industry protection coordination study - manufacturing industry - protection coordination analysis - petrochemical protection relay coordination studies - off shore - electrical protection relay coordination studies - utility electrical protection relay coordination study - distribution electrical protection relay coordination analysis studies - transmission electric protection coordination studies - utilization - electrical protection coordination studies - fuel - electrical protection coordination study - oil and gas - electrical protection coordination studies - Chevron - electric protection coordination study - Siemens electric protection coordination simulation - ABB electrical protection coordination studies using ETAP - Japan electrical protection coordination study using ETAP - international electrical protection coordination analysis using ETAP - local electrical protection system coordination study using ETAP - modern protection system coordination study using ETAP - overcurrent protection system coordination studies using ETAP - earth fault - electrical protection study - Indonesia - electrical protection studies - Australia - electrical protection study - Brunei - electrical protection studies - Thailand - electrical protection analysis - Bangkok - electrical protection analysis study - Jakarta - electrical protection analysis studies - IEEE - electrical protection coordination analysis study - Japan - electrical protection coordination analysis studies - Kyoto - protection coordination analysis study - Murba - protection coordination analysis studies - industrial - protection coordination study - manufacturing - protection coordination studies - chemical - protection coordination analysis - oil and gas - protection coordination studies - consulting services - protection coordination study - consultancy - protection coordination analysis - consultants - protection coordination study - company - protection coordination studies - firm - protection coordination evaluation study - theory - protection coordination analysis studies - report - protection coordination analysis study - IEC - protection coordination analysis studies - SNI - protection coordination evaluation - Myanmar - protection coordination analysis - newest IEEE standard - electric protection systems - ANSI - electric protection system - NEMA - electric protection systems consultant - NEC - electric protection system consultant - BS - electrical protection system consultants - VDC - electrical protection system consultant - short circuit - electric protection system consultant in Indonesia Raya - protection coordination studies in Jakarta Pusat - protection coordination study consultant in Indonesia - three - protection coordination studies consultant - equipment - protection coordination study consultants - devices - protection coordination study consultant - systems - last electric devices protection coordination evaluation - moderate protection coordination evaluation - protection coordination evaluation - new protection coordination evaluation - building - protection coordination evaluation consulting service - SKM - protection system coordination study with ETAP - in Indonesia Barat - protection coordination study with ETAP - Java - protection system coordination study using ETAP - Bali - protection coordination study using ETAP - NEC - protection system coordination studies using ETAP - protection coordination studies using ETAP - protection system coordination analysis using ETAP 20 - group - protection coordination evaluation using ETAP - modern devices - protection system coordination evaluation using ETAP -

Protection Coordination Study

What is Protection Coordination Study?

The electrical protection coordination study is a study or analysis to determine the setting of protection relay and circuit breaker. Its main purpose is to obtain an optimal compromise between protection and selectivity. The study includes determining fault clearing time and coordination of upstream electrical protective equipment. Proper coordination and disruption clearing times can help reduce damage to electrical equipment and protect workers from harm. Study and analysis of coordination of protection equipment is one part of the electric power systems study. Protection coordination analysis studies is carried out after a load flow study and short circuit study is carried out —Omazaki Engineering is a consultant who provides protection system coordination studyusing software such as ETAP, EasyPower, SKM, and so on. Contact us if you need protection system coordination analysis and study consultants by sending an email to cs@omazaki.co.id or filling in the form in contact.


The coordination study determines the extent of coordination of overcurrent protection devices in the electrical system.  It also provides an analysis of all possible operating scenarios that will be or have been affected by proposed or completed additions or changes to the system.

  1. Selective Coordination
    Determines the type of protection equipment, characteristics, settings, or rated current rating that provides the correct selective coordination, equipment protection and interrupt rating for the bolted circuit of short circuit current available at the point of application for each overcurrent protection device.
  2. Interrupted Coordination
    Determines the type of protection equipment, characteristics, settings, or ampere rating that allows the non-coordination range of the overcurrent protection device. In this case, the coordination of the overcurrent protection equipment may be impaired because of the selected or installed overcurrent protective device or to achieve the protection of the selected or installed equipment.


Why is It Important to Conduct Protection Coordination Studies? - electrical protection system study - Lima - calculation - electrical protection system studies - simulation - electrical protection system study - scenario - electrical protection system studies - recommendation - protection system studies using ETAP - short circuit rating - protection system study using ETAP - equipment - protection device study - overall protection devices study - industrial protection device study - scalable protection devices study -

Electrical systems usually use fuses and circuit breakers to protect electrical equipment such as cables, transformers, motors, and other components. If there is a fault in the equipment, usually a short circuit, it is recommended that the fault only affects that part of the system where the fault occurs. If a disturbance in a piece of equipment turns out to be affecting the entire system then something is wrong.

Suppose a factory has a short circuit fault in the electrical load which is relatively far from the main distribution panel. However, this disturbance caused the main breaker to trip and ended up with a blackout. It should only be the circuit breaker closest to the fault point that trips. This is the case that often occurs in electrical distribution systems with protective equipment that are not well designed and coordinated. This is where the study of protection coordination in electrical system is important.

Facilities with the correct protection coordination scheme can save you money in reducing the effects of blackouts.

In addition, a protective coordination study is also needed to ensure the safety of personnel and the general public. Also, it is to ensure that equipment is not damaged in a fault condition according to the requirements of established standards. The study includes the determination of fault clearing time and coordination of electrical protection devices. Proper coordination and proper fault clearing times can help reduce damage to electrical equipment and protect workers from harm.


Purposes and Objectives of Protection Coordination Study

The objective of the protection coordination study is to verify that all protective equipment in the system such as relays, breakers, fuses, etc., are properly coordinated and are sized according to the protected equipment.

The benefits of a protective equipment coordination study include:

  • Improved system and facility reliability
  • Reduces the cost impact of a disruption
  • Improved equipment protection
  • Increased operating efficiency
  • Assist in operations and help prevent unnecessary downtime
  • Prevent damage by identifying underrated equipment
  • Prevent breakdown by identifying overloaded equipment

In a properly coordinated system, protective equipment is selected and adjusted to minimize the impact of equipment interference in a system. A coordination study analyzes the characteristic curves of the fuse and breaker and compares them to each other on a log-plot similar to the one shown in the following figure. Any areas of miscoordination will be visible with overlapping curves from various devices.

 - what is time plot - what is protection coordination study - on site - what is protection coordination analysis -


How to Conduct Relay Protection Coordination Study?

Reference Standard
  • IEEE 141 – Recommended Practice for Electric Power Distribution and Coordination of Industrial and Commercial Power Systems
  • IEEE 242 – Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems
  • IEEE 399 – Recommended Practice for Industrial and Commercial Power System Analysis
  • IEEE 241 – Recommended Practice for Electric Power Systems in Commercial Buildings
  • IEEE 1015 – Recommended Practice for Applying Low-Voltage Circuit Breakers Used in Industrial and Commercial Power Systems.
  • I­dEEE 1584 – Guide for Performing Arc-Flash Hazard Calculationsl
  • ANSI C57.12.00 – Standard General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers
  • ANSI C37.13 – Standard for Low Voltage AC Power Circuit Breakers Used in Enclosures
  • ANSI C37.010 – Standard Application Guide for AC High Voltage Circuit Breakers Rated on a Symmetrical Current Basis
  • ANSI C 37.41 – Standard Design Tests for High Voltage Fuses, Distribution Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches and Accessories.
  • NFPA 70 – National Electrical Code, latest edition
  • NFPA 70E – Standard for Electrical Safety in the Workplace, latest edition
Study Steps for Protection Equipment Coordination
The protection coordination study consists of the following steps:
  • Short circuit study
  • Data collection – In addition to the data collected for short circuit studies, additional information on the settings and current ratings of all protective devices is required.
  • Manufacturer data – Each protective device has unique response characteristics, documented on the manufacturer’s “time-moment curve” required for the study.
  • Computer analysis – Although protection coordination studies can be done by hand, it is much easier to use computer software available in the market. Many programs have time-current curve libraries for most of the devices found in the power system. Those that are not in the library can be entered and saved for future use.
  • The computer program then allows the technician to determine the optimal settings that will provide the best protection for the system. In some cases, coordination between two devices is not possible. Engineering assessments are then used to determine the most appropriate arrangement that will minimize equipment damage.
  • Results tab – Settings and ratings of each protective device (circuit breaker, fuse, motor controller, etc.) as determined by the analysis, are put in the table for comparison with the setting and current field values.
  • Final report – A detailed report describing the scope of the study, all assumptions, data origins (including current-time curve), tabulated results, and recommendations for corrective action are published at the end of the study.


 - protection system consultant - Serpong - electrical protection system consultants - fault current - protection system consultant - ground fault - protection system consultants - zero sequence - protection system consultant in Indonesia - New Zealand - protection system consultant - Darwin - protection systems consultant - Timor Leste - protection systems consultants - Vietnam - protection systems consultant - Luzon - protection systems consultants - Manila - protection systems consultant - Kuala Lumpur - protection systems consultants - Selangor - protection systems consultant - Kedah - protection systems consultants - Malawi - protection systems consultant - Peru - protection systems consultants - Panama - protection systems consulting services - Egypt - protection system consulting services - Turkey - protection coordination consultant - Qatar - protection coordination consultants - UEA - electrical protection coordination consultant - Kuwait - electrical protection coordination consultants - Maladewa - protection coordination consultant - Canada - protection coordination consultants - Mexico - protection coordination consultant - Spain - protection coordination consultants - Barcelona - protection devices coordination consultant - Milan - protection devices coordination consultants - Genoa - protection devices coordination consultant - Granada - protection devices coordination consultants - Paris - protection devices coordination consultant - Italy - electrical protection devices coordination consultants - IEEE 142 - Contact Omazaki Engineering if you are looking for electrical protection system and equipment coordination study and analysis consulting services from a professional consultant to assist your new or existing project in Indonesia and South East Asia.


Related Articles:


Scroll to Top