On September 27 at 11:30 a.m. in the Parque Barigui room, engineer Fabio Toshio Nakatani will give a presentation on: Hybrid analysis (man+technology) in predictive maintenance of rotating electrical machines. Discussing Industry 4.0 in the area of maintenance in relation to industrial automation and the integration of different technologies. Artificial intelligence, robotics, neural networks and big data with the aim of improving processes and increasing productivity and reliability. But where does this technological evolution leave the role of man (specialist)? How will integrated work between technology and specialists increase the degree of reliability of rotating electrical machines?

Register at https://cbmga.abramanoficial.org.br/ and visit the Nishi stand during your participation in the country’s main Maintenance and Asset Management event.

O post Nishi takes part in the 38th Brazilian Congress on Maintenance and Asset Management, exhibiting products, services and equipment apareceu primeiro em Nishi.

PROGRAM:

• Review Theory of rotating electrical machines;
• Technology and state of the art of rotating electrical machines;
• Stator failure mechanism and repair. In each mechanism, the process, root cause is discussed,
  symptoms and remedies are discussed;
• Rotor failure mechanism and repair. In each mechanism, the process, root cause, symptoms and
  symptoms and remedies are discussed;
• Mechanism of core lamina insulation failure. In each mechanism, the process is discussed,
  root cause, symptoms and remedies are discussed;
• General principles of testing and monitoring;
• Off-line testing of the rotor and stator windings. In each test, theory and purpose are discussed,
  method and interpretation are discussed;
• Online testing or monitoring of the rotor and stator winding. In each test or monitoring,
  principles and interpretation are discussed;
• Core tests. In each test, theory and purpose, method and interpretation, test
  test method and interpretation are discussed;
• Factory and field acceptance tests of new winding. Pre-qualification tests are discussed,
  factory and field tests of rotor, stator and core windings are discussed;
• Maintenance strategies. Maintenance options (corrective, preventive and predictive) and inspection for various
  and inspection for various rotating electrical machines.

PRACTICAL EXERCISES:

During the course practical exercises may be conducted with the problems brought by the participants. Therefore, students should bring problems that they have experienced and that have not yet been adequately solved in their company. Some tests will also be performed on insulation systems and/or winding of medium or high voltage motor/generator with a workload of 04 hours.

Registrations can be made by e-mail directly with Hara Engenharia:

E-mail: haraengenharia@gmail.com

Whatsapp: 41 – 9 9624 7347

O post ROTATING ELECTRIC MACHINERY MAINTENANCE COURSE October 02 to 06, 2023 apareceu primeiro em Nishi.

We will be discussing an example of the generator failure mechanism which can lead to a quick (months!) insulation breakdown. Do you wish to know that it is?

Please join us on Thursday 04 May 2023, 11am Brazil time (3pm UK time). We will go through details and RCA of 2 generator breakdowns, with hope that it will help you to prevent such situation in the future.

Please join the training using the link below:  
https://meet.zoho.eu/UDSxeI82x6

NOTE:
Please remember to register before the meeting, as number of participants is limited. Chrome and Firefox do not require downloading any other add-ons or apps, therefore these are preferable web browsers. Other web browsers may require downloading additional files. Please check with your IT Department.

O post FREE WEBINAR: Generator failure – Root Cause Analysis (RCA) of 2 generators with insulation breakdown apareceu primeiro em Nishi.

Voltage classification of generators/motors:

• Low Voltage: Round or Enameled Wire / Voltage Class: 127/220/380/440/760 V.
• Medium Voltage: Rectangular Wire / Coils or Bars / Voltage class: 2,3/3,4/4,16/6,6/6,9 kV.
• High Voltage: Rectangular Wire / Coils or Bars / Voltage Class: 13,8/16,5/18,0 kV or higher.

Standardized offline electrical testing:

• Insulation Resistance (IEEE-43);
• Polarization Index (IEEE-43);
• Ohmic Resistance (IEEE-118);
• HypotAC/DC (IEEE-4 / IEEE-95);
• Step VoltageDC (IEEE-95);
• Surge Test (IEEE-522);
• Off-line Partial Discharges (IEEE-1434 / IEC6034-27-1);
• Delta Tangent (IEEE-286);
• Capacitance (IEC 60034-27-30);
• Corona in darkroom) (IEEE-1799).

Turn on the subtitles in your language and watch below in Nishi’s Youtube channel the live recording and learn more about the definition and application of each electrical test according to voltage level and how it is essential for a good diagnosis of the condition of the motor/generator winding.

Take part in upcoming live opportunities to ask questions and make comments directly with an expert on rotating electrical machines.

Get in touch directly with engineer Fabio Toshio and get your questions answered: fabio.toshio@nishi.com.br

Request a commercial proposal: E-mail: nishi@nishi.com.br

O post Electrical Tests: Low Voltage Winding x Medium High Voltage apareceu primeiro em Nishi.

Access below the registration form with information about the course, values and conditions:

Course_Machine Maintenance_November_2021

Machinery Maintenance Course_October_2021

Get in touch with Hara Engineering:

Hara Engineering
Silva Jardim, 2939 9º andar – Agua Verde – 80240-020 – Curitiba
80240-020 – Curitiba – PR
Tel and Fax: 41 – 3322-7818 / 9 9258 5986
e-mail: haraengenharia@gmail.com
www.hara.eng.br

O post COURSE OF MAINTENANCE OF MEDIUM AND HIGH VOLTAGE ROTATING ELECTRICAL MACHINES apareceu primeiro em Nishi.

In this week’s webinar we present the second part of the electrical test using the PDMA MCEMAX MCEGold® for off-line analysis.  In the video we perform a hands-on demonstration. We present how to identify broken bars in rotor cage performing the Rotor Influence Test and complete explanation about each type of off-line test.

GAP-N: Predictive Analysis of Electric Motors and Generators

Off-line testing:

Standard Test:

• Ohmic Resistance between Phases;
• Inductance between Phases;
• Insulation resistance corrected to 40ºC;
• Capacitance;
• Polarization Graphical Index;
• Step Voltage DC;
• Rotor Influence Test.

Watch the videos below via Nishi’s Youtube channel:

Webinar de ensaios elétricos GAP-N I PDMA MCEMAX®powered by MCEGold® PDMA OFF-LINE PARTE 2 de 2:

Webinar de ensaios elétricos GAP-N I PDMA MCEMAX MCEGold® PDMA ON-LINE PARTE 1 de 2:

Webinar de ensaios elétricos GAP-N I ENSAIO DE RESISTÊNCIA DE ISOLAMENTO:

Contact our team and request an assessment of your equipment’s operational reliability and avoid unplanned maintenance on your equipment.

O post GAP-N I PDMA MCEMAX MCEGold® PDMA OFF-LINE Electrical Testing Webinar PART 2 of 2 apareceu primeiro em Nishi.

Endwinding vibrations is a failure mode that is becoming recurrent in large turbogenerators, especially those manufactured since the last two decades. This problem is not unique to one manufacturer and affects most of them, and may be related to market competitiveness and the need to reduce manufacturing costs. One of the parts affected by these cost reductions are the endwinding, which have suffered modifications in the old and consolidated fastening systems that did not present such problems.

Combining the problems in the design/manufacturing with the generator’s operating conditions, this problem can lead to major failures/losses, in the most severe cases, lead to short circuit of the winding and consequent need for rewinding of the stator. Besides the clear losses with the sending of the generator for maintenance, there is also the high loss in energy production due to the inability to operate the machine. Thus, the identification of problems related to vibration in the endwinding should be found as soon as possible.

By performing inspections, associated with periodic tests on the endwinding, failures and the most serious scenario can be avoided and as will be demonstrated in this article, by performing the bump test and the correct interpretation of its results, it is possible to identify the regions with endwinding vibration problem and perform the appropriate and timely corrections.

Watch the presentation below:

Read more Nishisan tips in our Blog and contact us to clarify your doubts about the solutions offered by Nishi in the maintenance of your equipment.

O post ENDWINDING VIBRATION OF TURBOGENERATOR 234.4 MVA apareceu primeiro em Nishi.

The instructor, Takao Paulo Hara, has vast experience in the electrical sector, working in the power generation area for over 30 years and with consulting in operation and maintenance of rotating electrical machines.

The target audience is aimed at professionals whose mission is to operate and maintain motors and generators, maximizing availability and reliability with adequate costs, respecting the health and safety of employees and also of the company’s environment.

O post NISHI RECEIVES MAINTENANCE COURSE WITH MARKET SPECIALIST apareceu primeiro em Nishi.

The participants made a technical visit to Nishi’s facilities and followed tests and trials discussed in theory and applied in practice.

O post NISHI RECEIVES PARTICIPANTS OF THE COURSE OF ROTATING ELECTRICAL MACHINES apareceu primeiro em Nishi.

PROGRAM:

• Review Theory of rotating electrical machines;
• Technology and state of the art of rotating electrical machines;
• Stator failure mechanism and repair;
• Rotor failure mechanism and repair;
• Mechanism of core lamina insulation failure;
• General principles of testing and monitoring;
• Off-line testing of the rotor winding and stator;
• Testing or online monitoring of the rotor winding and stator;
• Core tests;
• Factory and field acceptance tests of new winding. Pre-qualification tests, factory and field tests of rotor windings, stator and core are discussed;
• Maintenance strategies. Maintenance options (corrective, preventive, and predictive) and inspection for various rotating electrical machines are discussed.

Registrations by e-mail and phone:

Hara Engenharia
Av. Silva Jardim, 2939 9th floor – Agua Verde
80240-020 – Curitiba – PR
Tel and Fax: 41 – 3322-7818 / 9 9258 5986
e-mail: haraengenharia@gmail.com
www.hara.eng.br

O post COURSE OF MAINTENANCE OF ROTATING ELECTRICAL MACHINES OF MEDIUM AND HIGH VOLTAGE – DECEMBER 2020 apareceu primeiro em Nishi.