PEC 1 2009 Section 4.30 Motor, Motor Controllers and Circuits
Attendees of the 2nd technical seminar
Following a single line diagram of motor controllers and circuits for erection and troubleshooting is unfussy. But preparing its required information is a tedious job and requires right mind-set towards standards.
That’s why thru the untiring and fruitful effort of IIEE-CRCSA formulated a seminar on Philippine Electrical Code PEC 1 2009 edition on Article 4.30 on “Motor, motor control and circuits” that will suffice the information needed in preparing the absolute single line diagram for motor controllers. This colloquium was headed by Engr. Felix Z. Caoile, REE, graduate of Saint Louis University and currently working as Electrical Design Engineer of EMCO Engineering Ltd. There are a lot of standards thou, but thru the effort of PEC 1 committee’s harmonizing of American and European standard that makes PEC 1 2009 edition impeccable for the aforementioned seminar.
The primary intentions of this seminar were to re-freshen our colleagues especially those who are working with motors, controllers and circuits. Secondly, it serves as a knick-knack that an aspirant PEE should have a deep knowledge on PEC as one of the major requirement of becoming a PEE as latter discussed by Engr. Daniel Cabasa. Lastly, after this seminar the participants would be able to size up properly the electrical items such as conductors, protective devices, overload device, contactors, disconnect switches and etc as per PEC 1 2009 article 4.30.
One of the highlights of this seminar was the importance of PEC 1 2009 that it can be use as our guide in the assessment and inspection on safetiness and completeness of electrical design; this was address to QA/QC’s and electrical designers. In addition, it was disseminated to all participants that the purpose of PEC is for proper safeguarding of persons from hazards arising from the use of electricity. The ninety nine attendees were enthusiastic to hear what’s inside of each slide. The colloquium was embodied by 81 attendees (members and non members), 14 BOD’s, 3 past presidents and 1 student, a total of 99 attendees.
As the saga of the seminar continues, the methodology of delivering the seminar was based on the hierarchy of single line diagram as per article 4.30. In this way the attendees appreciated on where to locate a certain article for a certain electrical items on the motor one line diagram. Also tables for allowable ampacity of conductor, current rating of motors rated in horsepower, and other tables were shown and explained on how to use it appropriately. Thru the harmonization of the American and European standards, it was disseminated that the size of cables are now in mm²; which is more convenient to use, thanks with the endless effort of PEC 1 committee.
Some of the application of motors was given consideration for proper selection of correction factors. For example, for a motor with an intermittent duty has a corresponding correction factor to apply to the full load current of the motor. Sample calculations were also shown as per section 4.30 and interrelate it in actual practice. Calculation of feeder conductor as per section 4.30.2, calculation of feeder short circuit and ground fault protection section 4.30.5 and so on. In these particular sections, the attendees participated lively by asking questions related to the motor controls in reference to their respective actual practices. Sample calculations are sited with regards to several motor(s) and several motor(s) plus another load. In this way, all sections will be applicable on this example. It was done gradually so that the participants will appreciate were the values came from. After the calculation proper, we conducted on how to properly select the sizes of the conductors, short circuit and ground fault protective, disconnect switches and so on. However, we run out of time that we need to conduct a part two this coming month.
What to expect in part 2? The delegates will be revitalizing their technical knowhow on power factor correction, how to size its protective devices, to size its conductors, on how to use locked rotor codes and etc.
Electricity is the blood of industries as they say but also considered as unseen lethal force that can cause fatal catastrophes such as electric shocks, burns, or even resulting to death.
The IIEE-CRCSA fruitfully conducted safety seminar centered in our respective workplaces. Understanding the dangers of electricity, learning how to respond in emergency situations and safety practices are some of the topic discussed to cede any dangers from the use of electricity.
The colloquium also cited the potential reasons contributing electrical hazards which are poor wiring, exposed electrical parts, ungrounded electrical systems and tools and so on.
On the latter part of the seminar, delivers the protective measure to reduce or possibly relinquish the dangers from the use electricity such as proper grounding, use of GFCI’s, proper use of fuse and breakers, guarding live parts and adequate training for employees.
Safety seminar was vivaciously conducted by Engr. Jose Jaime Bautista Jr and attendees partake lively and besides SAFETY IS EVERYONE’S BUSINESS!
How to Become a PEE
The primary objective of this part of the seminar was to help developed a qualified REE’s in preparation of technical reports in compliance to BEE requirements. It was clearly emphasized the criteria’s such as qualification for registration as per RA 7920, who are eligible for the application, the do’s and don’ts on technical report and so on.
This part was headed by Engr. Daniel G. Cabasa and further encourages all REE’s who are 4 years in experience and above to take their exam by this year.
2013 SPLBE REE and RME
This latter part of the seminar concluded the schedule of the review classes schedules for aspiring REE’s and RME’s, the corresponding subjects and dates, review fees and lastly the documents needed by the examinee for taking the board exam.
Undeniably, the 2nd conducted seminar on motor controls in compliance to PEC 1 2009 edition, safety seminar, how to become a PEE and the SPLBE was a triumphant venture in response to this year’s challenging theme “Leading The Electrical Practitioners Towards Global Recognition".