Advanced Services

At ARIXET, we offer a range of advanced services designed to address complex challenges and optimize the performance of power systems. Our expertise in failure analysis of power system transients enables us to provide valuable insights into the causes of damage to high voltage equipment. Through comprehensive case studies and in-depth analysis, we identify the factors contributing to system transients and offer practical solutions to mitigate their impact. Our services cover various aspects of power system transients, including:

2-1- Failure Analysis of Power System Transients

Our team specializes in investigating and analyzing power system transients to identify the root causes of equipment damage. We delve deep into the behavior of transients, examining their characteristics and impact on high voltage equipment. By meticulously studying case histories and employing advanced simulation techniques, we gain a comprehensive understanding of the transient phenomena affecting power systems. This in-depth analysis allows us to provide tailored recommendations and practical solutions to prevent future equipment failures and ensure the reliable operation of your power infrastructure:

Influence of Ferro-Resonance Phenomena

We conduct extensive studies to evaluate the influence of ferro-resonance phenomena on medium voltage potential transformers (PTs), high voltage capacitive voltage transformers (CVTs), and power transformers. Ferro-resonance can lead to severe voltage surges and mechanical stresses, which pose significant risks to equipment integrity. Our in-depth analysis includes detailed simulations and calculations to assess the impact of ferro-resonance and develop effective mitigation strategies. By providing recommendations for device selection, protective measures, and system design improvements, we help you safeguard your high voltage equipment from the adverse effects of ferro-resonance.

Effect of Resonance on High Voltage Equipment

Resonance phenomena can have detrimental effects on the performance and reliability of high voltage equipment, including transformers and surge arresters. We conduct comprehensive studies to analyze the resonance characteristics and their impact on equipment operation. Through advanced simulation techniques and in-depth analysis, we identify resonance frequencies, study the interaction between system components, and provide practical recommendations to minimize resonance-related risks. Our expertise in this area ensures the optimal design and operation of your high voltage equipment, enhancing their performance, longevity, and overall system stability

Shunt Capacitor Transients and Design Optimization

Shunt capacitors play a crucial role in power factor correction and harmonic mitigation. However, their switching transients and resonance effects can result in voltage spikes and equipment stress. Our services focus on analyzing the transient behavior of shunt capacitors and providing expert guidance in designing optimal capacitor bank and passive harmonic filter configurations. By considering factors such as switching transients, harmonic resonance, and overvoltage protection, we ensure that your shunt capacitor systems operate efficiently and reliably. Our recommendations aim to minimize voltage fluctuations, optimize power factor correction, reduce harmonic distortion, and enhance the stability of your power distribution networks.

Grounding of Transformer Neutral Point

The grounding of transformer neutral points is a critical aspect of electrical system safety and equipment protection. We offer comprehensive analyses of grounding configurations, taking into account fault currents, system impedance, and transient behavior. By evaluating different grounding methods and their effects on system performance, we provide practical solutions to enhance safety, system stability, and equipment protection. Our expertise in grounding techniques enables us to recommend tailored approaches that mitigate the risk of ground faults, reduce the impact of transient events, and ensure the reliable operation of your power systems.

Insulation Coordination Studies and Practical Solutions

Insulation coordination is essential for maintaining the reliable operation of high voltage equipment. Our services encompass thorough studies of insulation levels and their adequacy to withstand lightning surges, switching surges, and operating voltages. We employ advanced simulation tools and analysis techniques to evaluate insulation coordination and identify potential weaknesses. Based on our findings, we offer practical solutions that help you enhance insulation performance, mitigate insulation-related risks, and optimize the lifespan of your equipment. Our goal is to ensure the safe and reliable operation of your power systems, minimizing downtime and maximizing system performance.

Through our failure analysis services for power system transients, we enable our clients to identify vulnerabilities, mitigate risks, and enhance the reliability and lifespan of their high voltage equipment. At ARIXET, we are dedicated to providing advanced solutions that empower the future of electrical infrastructure.

At ARIXET, we specialize in providing advanced services to analyze and optimize the performance of protection systems. Our dedicated team of experts conducts thorough failure analysis of protection systems, focusing on the maloperation of digital relays in the presence of system transients. Through comprehensive case studies and practical projects, we identify the causes of maloperation and develop practical solutions to enhance the performance and reliability of protection systems. Our services encompass various aspects of protection system failure analysis, including:

2-2 Failure Analysis of Protection Systems

Our extensive experience in protection system analysis enables us to investigate and identify the causes of maloperation in digital relays during system transients. We conduct detailed case studies to understand the underlying issues and challenges faced by different protection systems. By analyzing the behavior of digital relays and their response to system transients, we provide valuable insights into the maloperation mechanisms. Based on our findings, we offer practical solutions to mitigate maloperation risks and improve the overall performance of protection systems.

Many Case Studies Regarding Maloperation of Digital Relays in Presence of System Transients and Providing Practical Solutions

We have conducted numerous case studies focusing on the maloperation of digital relays in the presence of system transients. By analyzing real-world scenarios and system behavior, we have gained valuable insights into the challenges and vulnerabilities faced by protection systems. Through our case studies, we identify common issues, highlight potential risks, and provide practical solutions to enhance the reliability and performance of digital relays. Our recommendations aim to minimize false tripping and ensure the effective operation of protection systems during transient events.

Some Practical Projects about Performance Analysis and Function Tests of Various Types of Relays

Our expertise extends to performing comprehensive performance analysis and function tests on various types of relays used for line, transformer, motor, and other applications. We collaborate with leading relay manufacturers such as Siemens, ABB, GE, Areva, and Sifang to evaluate the performance and functionality of their relay offerings. Through practical projects, we assess the strengths and weaknesses of different relay models, identify potential drawbacks, and propose solutions for performance enhancement. Our recommendations help you select the most suitable relays for your specific applications, ensuring reliable protection and optimal system performance.

By offering failure analysis services for protection systems, we empower our clients to enhance the reliability and functionality of their digital relays. At ARIXET, we are committed to providing advanced solutions that empower the future of electrical infrastructure.

2-3- Preparing National Standards and Technical Instruction

At ARIXET, we take pride in our expertise in preparing national standards and technical instructions for the electrical industry. We play a vital role in shaping the regulatory framework and ensuring the safe and reliable operation of electrical systems. Our comprehensive services encompass the development of national detailed protection codes and the formulation of technical instructions for various electrical equipment. By adhering to stringent standards and providing clear guidelines, we contribute to the establishment of a robust and efficient electrical infrastructure. Our services include:

2-3-1- Preparing National Detailed Protection Codes

Technical Instruction of Iran EHV Electrical System Protection:

We develop detailed technical instructions that govern the protection requirements for Iran’s Extra High Voltage (EHV) electrical systems. These instructions cover a wide range of aspects, including fault detection, fault isolation, and system restoration. By aligning with international best practices and considering the specific needs of the Iranian electrical network, we ensure the effective protection of EHV systems and the safety of associated equipment.

Technical Instruction of Iran HV Electrical System Protection

Our team formulates comprehensive technical instructions for the protection of Iran’s High Voltage (HV) electrical systems. These instructions outline the necessary measures to detect and mitigate faults, ensuring the reliable and secure operation of HV networks. We address various protection elements, including overcurrent protection, differential protection, and distance protection, to safeguard HV systems against potential risks and disturbances.

Technical Instruction of Iran Electrical MV and LV Systems Protection

We develop detailed technical instructions for the protection of Medium Voltage (MV) and Low Voltage (LV) electrical systems in Iran. These instructions encompass a wide range of protection schemes, including overcurrent protection, earth fault protection, and voltage protection. By providing clear guidelines and specifications, we assist in the implementation of effective protection strategies and promote the safe and efficient operation of MV and LV systems.

2-3-2- Preparing Technical Instructions for Electrical Equipment

We provide a comprehensive set of instructions named “Technical Instruction of Test, Service, and Maintenance” for various electrical equipment. These instructions serve as a guide for conducting tests, performing routine maintenance, and ensuring proper servicing of critical electrical components. Our instructions cover the following equipment

Current Transformers

Our guidelines specify the testing procedures, maintenance requirements, and recommended service intervals for current transformers. By adhering to these instructions, you can ensure the accurate measurement of current and maintain the integrity of your measurement systems.

Voltage Transformers

We provide detailed instructions for testing, servicing, and maintaining voltage transformers. These guidelines cover aspects such as insulation testing, polarity checks, and calibration procedures to ensure accurate voltage measurement and reliable performance.

Power Transformers

Our technical instructions outline the testing and maintenance procedures for power transformers, including insulation resistance tests, transformer oil analysis, and routine maintenance activities. Following these instructions helps extend the lifespan of power transformers and ensures their optimal performance.

Circuit Breakers

We offer comprehensive instructions for testing, servicing, and maintaining circuit breakers. These guidelines cover various types of circuit breakers, including air circuit breakers, oil circuit breakers, and vacuum circuit breakers. By following our recommendations, you can ensure the reliable operation and effective protection of your electrical systems.

Ground Grid

Our technical instructions provide guidance on testing and evaluating the ground grid systems to ensure their effectiveness in electrical safety and fault current dissipation. We outline the procedures for soil resistivity testing, ground resistance measurements, and overall system evaluation, helping you maintain a reliable and safe grounding infrastructure.

2-3-3- Technical Specifications, Requirements, and Evaluation Indices for Electrical Equipment:

We develop a comprehensive set of instructions for various electrical equipment. These instructions define the necessary specifications, performance requirements, and evaluation criteria for different types of equipment. Our instructions cover the following electrical equipment:

Oil-impregnated Distribution Transformers

We provide detailed technical specifications and requirements for oil-impregnated distribution transformers, ensuring that they meet the necessary performance standards and safety regulations. By adhering to these specifications, you can procure high-quality transformers that deliver reliable and efficient operation.

Dry-Type Distribution Transformers

Our instructions outline the technical specifications and requirements for dry-type distribution transformers. We define parameters such as insulation class, temperature rise limits, and efficiency levels to facilitate the procurement and installation of safe and reliable dry-type transformers.

Medium Voltage Disconnectors

We establish technical specifications and evaluation indices for medium voltage disconnectors, ensuring their reliable performance and proper operation. Our instructions cover aspects such as rated voltage, insulation coordination, mechanical endurance, and electrical endurance, enabling you to select disconnectors that meet your specific requirements.

Current Transformers

We provide detailed technical specifications and requirements for current transformers, including parameters such as accuracy class, burden rating, and frequency response. By following our guidelines, you can ensure the accurate and reliable measurement of current in your electrical systems.

Potential Transformers

Our technical instructions define the technical specifications and requirements for potential transformers, addressing aspects such as accuracy, burden rating, and insulation coordination. By adhering to these specifications, you can procure potential transformers that provide accurate voltage measurement and meet the necessary safety standards.

Digital Relays

We establish technical specifications, performance requirements, and evaluation indices for digital relays used in protection systems. Our instructions cover aspects such as protection functions, communication protocols, testing procedures, and reliability criteria. By following our guidelines, you can select and deploy digital relays that meet your protection needs and ensure the reliable operation of your electrical systems.

At ARIXET, we are committed to preparing national standards and technical instructions that promote the safe and efficient operation of electrical systems. Our comprehensive guidelines help ensure compliance with regulatory requirements, enhance system performance, and empower the future of electrical infrastructure.

Empowering the Future
Supplying Essential Electrical Infrastructure Solutions

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Empowering the Future
Supplying Essential Electrical Infrastructure Solutions