June 2017 Issue
Today, when we think about motor protection we need to consider not only the protection of the motor itself. We need to address the impact of the motors on the protection of the distribution feeders in systems with large number of motors. We need to think about the impact of IEC 61850 and the requirements for object modeling of the advanced multifunctional motor protection IEDs. Another chall... More


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Industry News


World’s most accurate bay control unit, AQ-S255 is now available The 0.2S measurement accuracy and 3.2 kHz sampling frequency makes the AQ-S255 five to ten times more accurate than any conventional bay control unit. For the first time a bay control unit can be used for billing level measurements or accurate station level energy sum calculations. The high sampling frequency of 3.2kH... More


Easily automate command sequences with zenon The energy automation software zenon from COPA-DATA offers a new technology for user-friendly command processing in a substation. zenon Command Sequencer can be used to easily configure, test and execute command sequences. The sequences for the automation of substations are configured in a graphical editor with excellent usability. PLC programm... More

New Reyrolle 7SR18

7SR18 Solkor Line Differential Protection Relay The New Reyrolle 7SR18 has been developed after a long successful history of Solkor relays. Using the latest hardware technology, it now has the option IEC61850 with PRP and HSR redundancy.  Relays (and associated CTs) are installed at each end of the protected circuit. The relays are connected together with a fully supervised fibe... More

OMICRON electronics

The new COMPANO 100 excels in innovation COMPANO 100, the brand new test set for primary injection, secondary injection and basic protection testing, convinces with its unique battery operation, versatility, light weight (10 kg / 22 lbs), and compact design. It can be moved around easily and used for commissioning, maintenance and troubleshooting in substations, industry plants, railw... More

RPA Contributions Awards

The International Conference and Exhibition “Relay Protection and Automation (RPA) for Electric Power Systems 2017” was held in St. Petersburg, Russia and was supported by the Ministry of Energy of the Russian Federation and CIGRE B5 (see the conference report on Page 88). To celebrate the ten years anniversary of the inaugural conference in 2007, the organizers awarded several re... More

RTDS Technologies

New Generation of RTDS Simulator Hardware RTDS Technologies is thrilled to announce NovaCor™: a new generation of hardware for the RTDS® Simulator. NovaCor features IBM’s state of the art multicore POWER8™ processor and is the world’s fastest and most capable real time digital power system simulator. NovaCor is capable of simulating hundreds of power system ... More


World’s fastest transmission line relay available The SEL-T400L Time-Domain Line Protection is a traveling-wave microprocessor-based relay. It detects power system faults and sends a trip signal to breakers four to 10 times faster than present-day phasor-based relays, offering ultra-high-speed and secure protection of critical transmission lines. “We are protecting energy movi... More


GRB200 Centralized Busbar Protection Toshiba has launched a Centralized version of GRB200 a low impedance differential relay for application to single, double or ring busbars with/without transfer bus and 1½ breaker systems. It has a flexible configuration to facilitate future substation expansion. GRB200 can correctly distinguish between internal and external faults even in the ... More

Cover Story

Impact of IEC 61850 Edition 2 on the Object Modeling of Motor Protection IEDs

The article concentrates on the impact of Edition 2 of IEC 61850 on the object modeling of motor protection Intelligent Electronic Devices (IEDs). The first part of the article analyzes the functional hierarchy of motor protection IEDs. It then describes the challenges in modeling their functionality based on the IEC 61850 Edition 1 standard. The reason is the relatively flat hierarchy of the... More

IEC 61850 Update

Another note on the use of SCL

As you know, Edition 1 of IEC 61850 had SSD, ICD, SCD and CID files. Edition 2 added IID and SED files, and there are discussions to add an ISD file. While these abbreviations are easily explained, it is impossible to have a common understanding of what the files behind are, and what they include. After trying over the years to explain what these file types are intended for and desperately... More

Lessons Learned

Automated Testing of Motor Protection IEDs

The new technologies and the possibilities they gave to the protection engineers lead to a huge increase in the number of parameters which cannot be checked in the field any more. This applies to protection IEDs, including the ones protecting motors of different sizes. It is no longer sufficient to send the tester in the field with the command to test the protection device using a manually c... More

Proactive Motor Protection

Next Generation of Proactive Asset Management IEDs

Proactive functions take a holistic approach to the asset/equipment to be protected, and capture the entire evolution of a failure, starting from:  a) Detecting an anomaly or degradation of a subcomponent of the asset/equipment, b) Alarming the condition, c) Recording and logging the signals and evolving changes. Proactive functions are essential to detect critical asset degradation or ano... More


FIDVR and IEC 61850

Its impact on the electric grid has been further analyzed by a task force of specialists and published in a NERC (North American Electric Reliability Corporation) Technical Reference Paper on Fault-Induced Delayed Voltage Recovery. It includes the following definition provided by the Transmission Issues Subcommittee. Fault-Induced Delayed Voltage Recovery is a voltage condition initiated by a... More

Legal Issue

Sexual Harassment at Work

In our continuing quest in discussing harassment in the work place, and how to curb it, we now specifically turn to the rather unpleasant matter of sexual harassment. Both women, and men, often experience unprovoked advances throughout their daily lives, but such interactions are all the more uncomfortable, and disturbing, when they occur in a professional environment, where one is unable to... More

Motor Life

Increasing Motor Life and Process Continuity

Example causes of utility interruptions are: Storms Animal contact Conductor failures Tower failure Switch failure Substation failure, and Planned outages Example causes of in-plant interruptions are: Generating unit faults Transformer faults Cable failure Switchgear failure Conductor dig-in Maintenance Inadvertent breaker tripping When challenged with power... More

The Guru

Interview with PACWorld guru B. M. Buchholz

PAC World:  When and where were you born? B.M.B.: I was born on November 4th 1948 in the city of Eisenach - today the geographical middle of Germany. PAC World:  Where did you go to school? B.M.B: I visited 3 schools in Eisenach - the first two years a school nearby, then a school for distinguished pupils in the city center and from the 9th to the 10th grade the “Ernst-Abb... More


Protection History

Protection History Test Technique: Introduction by Walter Schossig, Germany, and Thomas Schossig, OMICRON electronics GmbH, Austria This article opens the series covering measurement and testing technique. All steps from putting into operation till operation will be described in general manner. Later primary and secondary testing of relays and measuring transformers will be covered. Tests... More

I Think

Show me the money?.

I have worked for over 15 years on the definition of IEC 61850 and strongly believe that the concepts defined in the standard are solid and provide an excellent basis for the automation of the processes for power utilities. The standard brings interoperability within reach and harmonizes and standardizes designs and architectures. All of these are great achievements. Looking at substation a... More

Industry Reports


Therefore the Transmission Issues Subcommittee (TIS) provides the following definition: Fault-Induced Delayed Voltage Recovery - a voltage condition initiated by a fault and characterized by: Stalling of induction motors Initial voltage recovery after the clearing of a fault to less than 90 percent of pre-contingency voltage Slow voltage recovery of more than two seconds to exp... More

Conference Reports

14th i-PC-GRID, San Francisco, CA, USA

The event was held 29 - 31 March 2017 in San Francisco, CA, USA, and was hosted by Pacific Gas and Electric Co. (PG&E). The 14th Annual Workshop on Innovations in Protection and Control for Greater Reliability Infrastructure Development as usual was organized by PG&E, Mississippi State University and Quanta Technology. The motto of the event was “Strategies for Energy Trends... More

2017 Power & Energy Automation Conference

The 19th Power and Energy Automation Conference (together with the former Western Power Delivery Automation Conference) was held traditionally in the historical Davenport Hotel in Spokane, Washington, USA from 21 to 23 March 2017. This conference has a specific focus on power utility automation and as a result it brings together professionals (mostly from North America) to share their kn... More

Georgia Tech Fault and Disturbance Analysis Conference

This 20th Annual event was held at the Georgia Tech Global Learning Center in Atlanta, Georgia, USA. The conference is jointly organized by The Transient Recorder Users Council and Georgia Tech. The main goal of the conference is to bring together specialists in the field of transient and disturbance recording technology and fault and disturbance analysis in an effort to discuss recent eve... More

Relay Protection and Automation for Electric Power Systems Conference, 2017

The 6th international Conference was held 25-28 April 2017 St. Petersburg, Russia. The Relay Protection and Automation for Electric Power Systems conference was held in St. Petersburg, Convention and Exhibition Center EXPOFORUM. More than 350 registered participants from 24 countries worldwide discussed the current state and development perspectives of the Power System Protection, Automati... More

SEAPAC 2017, Melbourne, Australia

SEAPAC 2017 was held 14 - 15 March 2017 at the Pulman Hotel in Melbourne, Australia. The 6th edition of the South East Asia Protection and Automation Conference (SEAPAC) was hosted by the CIGRE Australia B5 Panel.  The goal of this conference held every odd year is to promote discussion and knowledge regarding issues of interest to the industry. It is an excellent forum for both region... More

Texas A&M Conference for Protective Relay Engineers

The 70th Annual Conference for Protective Relay Engineers was held 4-6 April 2017 in College Station, Texas, USA.  The goal of the conference is to provide up to date information on protective relay technology and its applications. As usual the two-and-a-half day’s program included general and break-out paper sessions. This allows the technical committee to select more papers f... More

Book Review

Electric Motors and Drives

The 4th Edition of “Electric Motors and Drives: Fundamentals, Types and Applications” by Austin Hughes and Bill Drury is a book that can help expanding our knowledge about electric motors. What is interesting to note is that this latest edition is co-authored. The first three editions of the book were written by Austin Hughes - a teacher and researcher at the University of Leed... More


Homemade Motorized Machines

For many years it was sport - American Football - that fascinated me and took all of my leisure time, until I had to quit because of my knee. So I had to search for an alternative and it took a while until I found something as appealing, as pretty and with “full contact” again.  I became a bee keeper I always loved to watch the bees when I was taking a walk, but I never... More

Final Thoughts
There is a famous saying between engineers that applies to many different domains – “Garbage in, garbage out!” The question is do we know what is in? Power system protection specialists are used to setting protection relays based on the results from short circuit studies. And many of them accept the results from the calculations as the ultimate truth, without asking themsel... More

BeijingSifang June 2016