"Good evening, my lovely little slaves to fate."
Shishimai Rinka was a highschooler who ran a small café named Lion House in place of her grandmother. She lived her life much like any other person her age, but one day, she was caught up in an explosion while returning home on the train alongside her friend, Hitsuji Naomi. In an attempt to save her friend's life, she shields her on instinct the moment the explosion goes off, losing her life in the process. However, before she knew it, she was back at Lion House, happily chatting with her friends as if nothing had happened in the first place.
A few days later, she found herself in a strange world. Here she met Parca, an odd girl claiming to be a goddess. It turns out that she had somehow become a participant in Divine Selection, a ritual carried out over twelve weeks by twelve people, which allowed them to compete in order to undo their deaths. What shocked Rinka most of all, however, was the presence of her friend Mishima Miharu amongst the twelve.
In order to make it through Divine Selection, one must eliminate others by gathering information regarding their name, cause of death and regret in the real world, then "electing" them.
This turn of events would lead to her learning about the truth behind her death, as well as her own personal regrets. She would also come to face the reality that Miharu was willing to throw her life away for her sake, as well as the extents to which the other participants would go to in order to live through to the end.
Far more experiences than she ever could have imagined awaited her now, but where will her resolve lead her once all is said and done...?
こんにちは、あいうえおカンパニー代表の飯田（あけお）です。
「FATAL TWELVE」のKICKSTARTERキャンペーンは、皆様のおかげで無事、目標金額に到達することができました。
ご支援いただいた皆様、本当にありがとうございました。
遅ればせながら、この場を借りてお礼を申し上げます。
振り返ってみると、キャンペーンの１か月間は長いようでとても短い期間でした。
キャンペーンの開始からおよそ１時間で目標額の半分近くに到達し、その後も約10日間で最初のゴールを達成しました。
最終的なキャンペーンの総額は$50,516、支援人数は1,089名、中国語・フランス語への翻訳決定というストレッチゴールまで到達いたしました。
念願のフルボイス化だけでなく、今までにない３ヶ国語への翻訳まで行えることになり、とても嬉しく思っています。
そして多くの皆様に期待していただいている一方で、その期待に応えられるものを制作しなければいけないな、と責任も感じています。
実はこのお礼を書いている時点で既にシナリオは最終段階で、間もなく音声収録のための台本化作業となっています。
これからは演出の指定やイラスト等の素材制作、そしてゲームとして組んでいく作業が本格的に進行していきます。
お届けまでいましばらくお待ちください。
最後に、個人的な感想を。
昨年の夏「FATAL TWELVE」を発表した時点でKICKSTARTERの実施はほぼ決まっていたのですが、時期やリターン内容、コストの確認、HPやPVの制作など想像以上に準備が多く、無事キャンペーンを開始できた時点でほっとしておりました。
結果を見ると想像以上に多くの方からご支援いただき、飛び上がりたいくらいに喜んでいます。
このお礼を書いている時点でそろそろシナリオ作業も完結しますが、ラストスパートが迫り胃の痛い限りです。
とはいえ、無事物語にFINと書くことができれば、イラストや音楽の制作、今回は更に収録も待っています！
初めて制作するあいうえおカンパニーのフルボイスゲーム。担当キャストの皆様がどんな演技をしてくださるのか楽しみで仕方がありません。
あらためまして、「FATAL TWELVE」KICKSTARTERキャンペーンにてご支援いただいた皆様、ありがとうございました。
そして「FATAL TWELEVE」に興味を持っていただいた皆様も、ありがとうございました。体験版を公開していますので、この機会にプレイしてみてください。
ぜひ、今後の情報にご期待ください！
以上をもって、KICKSTARTERキャンペーン終了およびお礼のご挨拶とさせていただきます。
今後とも「あいうえおカンパニー」をよろしくお願いいたします。
あいうえおカンパニー代表 飯田泰貴
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IEC 61869-1 is the cornerstone of instrument transformer engineering. It provides the dictionary, the safety rules, and the testing playbook that ensures a transformer manufactured in Europe can be safely installed and operated in Asia or the Americas. For any professional involved in the design, procurement, or maintenance of substation equipment, the IEC 61869-1 PDF is an indispensable reference document that ensures technical precision and global compliance.
Understanding IEC 61869-1: The Standard for Instrument Transformers
The International Electrotechnical Commission (IEC) has established a series of standards for instrument transformers, with IEC 61869-1 being a crucial part of this series. This standard, titled "Instrument transformers - Part 1: General requirements," provides the foundational specifications for instrument transformers used in electrical measurement and control systems. In this article, we will delve into the details of IEC 61869-1, exploring its significance, content, and implications for the industry.
What is IEC 61869-1?
IEC 61869-1 is a standard that outlines the general requirements for instrument transformers, which are devices used to transform high voltage and current levels to lower, more manageable levels for measurement and control purposes. These transformers are essential components in power systems, enabling the accurate measurement of voltage and current, and ensuring the safe operation of electrical networks.
Importance of IEC 61869-1
The importance of IEC 61869-1 cannot be overstated. By standardizing the requirements for instrument transformers, the IEC aims to ensure:
Content of IEC 61869-1
IEC 61869-1 covers a wide range of topics related to instrument transformers, including:
IEC 61869-1 PDF: Accessing the Standard
For those seeking to access the full text of IEC 61869-1, a PDF version is available from the IEC website or other authorized distributors. The PDF format provides a convenient and easily accessible way to review the standard, make annotations, and share with colleagues.
Industry Implications
IEC 61869-1 has significant implications for various industries that rely on instrument transformers, including:
Conclusion
In conclusion, IEC 61869-1 is a critical standard that ensures the performance, safety, and interoperability of instrument transformers. By understanding the requirements outlined in this standard, manufacturers, engineers, and users can ensure accurate measurements, reliable operation, and efficient system design. Accessing the IEC 61869-1 PDF provides a valuable resource for those working with instrument transformers, and we encourage readers to familiarize themselves with this essential standard.
Recommendations
For those working with instrument transformers, we recommend:
By following these recommendations, you can ensure that your instrument transformers meet the necessary standards for performance, safety, and reliability.
Understanding IEC 61869-1: The Foundation of Modern Instrument Transformers
In the world of electrical engineering, precision isn't just a goal—it's a requirement for safety and billing. If you've been searching for an IEC 61869-1 PDF, you are likely looking into the "General Requirements" for instrument transformers. This standard serves as the parent document for a series that has revolutionized how we measure and protect high-voltage networks. What is IEC 61869-1?
IEC 61869-1 is a product-family standard that defines the core principles and limits of error for newly manufactured instrument transformers. It applies to equipment intended for applications where the nominal voltage exceeds 1 kV AC or 1.5 kV DC. Key Updates in the 2023 Edition
The standard has seen significant updates recently, most notably with the release of IEC 61869-1:2023 (Edition 2). Here’s what changed:
Consolidation: It now incorporates IEC 61869-6:2016, merging general requirements for both traditional and low-power instrument transformers into one document.
Digital & Analogue: It establishes requirements for both analogue and digital secondary signals, essential for modern digital substations.
Wideband Accuracy: New optional classes (like WB1 and WB2) have been introduced to address the measurement of harmonics and distorted currents up to 20 kHz, which is critical for monitoring power quality in modern grids. Why This Standard Matters
Instrument transformers act as the "eyes" of the power grid. They scale down high currents and voltages to levels that meters and protective relays can safely handle. Without the uniform testing and error limits defined in Part 1, the reliability of billing and the sensitivity of protection systems would vary wildly between manufacturers.
IEC 61869-1, "Instrument Transformers – Part 1: General Requirements," functions as the foundational standard for modern instrument transformers, replacing the older IEC 60044 series. It establishes essential technical pillars, including accuracy classes, testing procedures, and safety requirements for both analog and digital equipment. The 2023 update, IEC 61869-1:2023, specifically addresses enhanced requirements for digital integration and harmonic frequencies, as detailed on iTeh Standards Iec 61869-1 Pdf
The IEC 61869-1 standard, titled "Instrument transformers – Part 1: General requirements," is the foundational "product family" document for all modern instrument transformers. Published by the International Electrotechnical Commission (IEC), it establishes the core principles for newly manufactured equipment used in high-voltage applications to ensure safe, accurate, and consistent electrical measurement and protection. Scope and Application
The standard applies to instrument transformers designed for systems with a nominal voltage higher than 1 kV AC or 1.5 kV DC. It covers units that produce either analogue or digital secondary signals for use with measuring instruments, control systems, and protective devices.
Frequency Range: It primarily addresses rated frequencies from 15 Hz to 400 Hz, as well as DC applications.
Product Family Structure: As Part 1, it must be read in conjunction with specific product standards, such as IEC 61869-2 for current transformers and IEC 61869-3 for inductive voltage transformers. Key Technical Requirements
The IEC 61869-1 PDF outlines several critical performance and safety parameters that manufacturers must satisfy: IEC 61869-1:2007
IEC 61869-1 is the foundational international standard that defines the general requirements for instrument transformers
. It serves as a "parent" standard, providing the core rules for newly manufactured units used in electrical measurement or protection devices with frequencies between 15 Hz and 100 Hz. Standards Council of Canada Key Overview of IEC 61869-1
This standard replaces and consolidates older standards (like IEC 60044-1 and IEC 60044-2) to create a more unified structure for current and voltage transformers. Aim Dynamics
: It covers both analogue and digital output instrument transformers.
: To ensure safety, reliability, and standardized performance across the global power industry.
: While Part 1 covers general requirements (insulation, temperature rise, mechanical needs), specific product types are detailed in subsequent parts, such as: IEC 61869-2 : Specific requirements for current transformers. IEC 61869-3 : Specific requirements for inductive voltage transformers. Standards Council of Canada Core Content of the Standard
If you are looking at the PDF documentation, it typically includes these critical sections: Service Conditions
: Defines standard environmental conditions (altitude, temperature, humidity) where the transformer must operate safely. Design & Construction : Rules for marking, earthing, and terminal requirements. Insulation Requirements
: Specifies the levels of electrical stress the equipment must withstand without failure. Testing Procedures : Detailed protocols for: Type Tests : To prove the design meets the standard. Routine Tests : Performed on every individual unit before shipping. Special Tests : Performed at the request of the purchaser. Where to Find the PDF
Since IEC standards are copyrighted, the full PDF is generally not available for free. You can legally access it through official standards bodies: IEC Webstore : The primary source for the official document. Standards Council of Canada : Provides detailed metadata and purchasing options. National Standards Bodies
: Organizations like ANSI (USA) or BSI (UK) also sell the adopted versions of this standard. Standards Council of Canada technical specification
IEC 61869-1 is the foundational "Product Family" standard for instrument transformers, establishing the general requirements for newly manufactured devices used in electrical measurement and protection. It serves as a base document that must be read alongside specific part standards (like Part 2 for current transformers or Part 3 for voltage transformers). 💡 Key Takeaway: 2023 Update
The latest edition, IEC 61869-1:2023, significantly updates the 2007 version and merges with IEC 61869-6:2016 to better address modern digital and high-frequency needs. ## Core Specifications
Scope: Applicable to instrument transformers with nominal voltages > 1 kV AC or > 1.5 kV DC.
Signal Output: Covers both traditional analogue and modern digital secondary signals.
Frequency Range: Standard rated frequencies from 15 Hz to 400 Hz, plus DC applications.
Standard Evolution: Replaces the older IEC 60044 series to create a more unified, modular testing and design framework. ## Major 2023 Technical Changes
The 2023 revision introduced several critical updates for the industry: IEC 61869-1:2023 - Standard | IECEE
IEC 61869-1 standard serves as the foundational "General Requirements" document for the entire 61869 series, which covers instrument transformers like current (CT) and voltage (VT) transformers. Standards Council of Canada While the official IEC 61869-1 PDF must be purchased through authorized distributors like the IEC Webstore Standards Council of Canada
, here is a breakdown of its core features and technical scope. Standards Council of Canada 1. Scope and Applicability
This standard applies to newly manufactured instrument transformers designed for use with electrical measuring instruments or protective devices. Standards Council of Canada Frequency Range: It covers systems with rated frequencies from 15 Hz to 100 Hz Output Types: Applicable to both output signals. Integration: IEC 61869-1 is the cornerstone of instrument transformer
It replaces older standards (like IEC 60044-1 and 60044-2), unifying general requirements for all transformer types into a single "parent" document. Standards Council of Canada 2. Service Conditions
The document defines the standard environment in which these transformers must operate safely and accurately: Temperature:
Standard ambient air temperature ranges (typically -5°C to +40°C for indoor use). Requirements for equipment installed at altitudes up to 1,000 meters (with derating factors for higher elevations). Pollution Levels:
Classification of environmental pollution that affects insulation requirements. 3. Key Technical Requirements
The "General Requirements" act as a template for more specific parts of the series (like IEC 61869-2 for CTs). It details: Insulation Coordination:
Specifications for clearances, creepage distances, and solid insulation to prevent electrical failure. Rated Insulation Levels:
Standards for power-frequency voltage withstand and lightning impulse voltage tests. Accuracy Classes:
Establishes the framework for how error limits (current and phase displacement) are defined, though specific values like 0.1, 0.2, or 0.5 are typically detailed in part 2. www.ijareeie.com 4. Testing and Verification
The standard categorizes tests into three main types to ensure long-term reliability: Type Tests:
Performed on a representative transformer to prove the design meets the specification. Routine Tests:
Carried out on every individual transformer before delivery (e.g., power-frequency voltage withstand tests on primary windings). Special Tests:
Optional tests agreed upon by the manufacturer and purchaser, such as chopped impulse or mechanical tension tests. 5. Structure of the IEC 61869 Series When looking for the IEC 61869-1 PDF
, it is important to understand that it is intended to be used in conjunction with a specific product part: IEC 61869-1: General requirements. IEC 61869-2: Additional requirements for Current Transformers IEC 61869-3: Additional requirements for Inductive Voltage Transformers IEC 61869-4: Additional requirements for Combined Transformers
For official compliance or engineering design, you should reference the full-text version available at the ANSI Webstore IEC Webstore insulation test voltage levels for a particular project?
IEC 61869-1 is an international standard titled "Instrument Transformers – Part 1: General Requirements". It serves as a foundational "Product Family" document for all types of instrument transformers, establishing the core technical, safety, and performance principles that apply across the entire product line. iTeh Standards Scope and Applicability
The standard applies to newly manufactured instrument transformers designed for measuring, protection, and control purposes in high-voltage applications: iTeh Standards Voltage Threshold: Nominal voltages higher than Frequency Range: Rated frequencies from 15 Hz to 400 Hz , as well as DC applications. Output Types: Covers both secondary signals. iTeh Standards Key Technical Features
IEC 61869-1 defines critical parameters to ensure interoperability and grid safety: Accuracy and Performance:
Specifies limits of error for secondary signals, including bandwidth and harmonic requirements. Environmental Standards:
Sets guidelines for operating conditions such as temperature, altitude, vibration, and pollution levels. Design & Construction:
Includes requirements for insulation materials (liquids, gases, solids), earthing, and electromagnetic compatibility (EMC). Safety Protocols:
Addresses fire hazard mitigation, corrosion resistance, and protection against internal arc faults. iTeh Standards Significant Updates (2023 Edition) The latest version, IEC 61869-1:2023
, replaced the previous 2007 edition with several technical revisions:
IEC 61869-1:2023 is the latest international standard that defines general requirements for instrument transformers intended for high-voltage applications. As a "Product Family" standard, it serves as the foundational document that must be used alongside specific product standards (like Part 2 for current transformers or Part 3 for inductive voltage transformers) to ensure equipment safety and reliability. Scope and Application
This standard is applicable to newly manufactured instrument transformers with analogue or digital secondary signals used for measuring, protection, and control.
Voltage Levels: Nominal voltages higher than 1 kV AC or 1.5 kV DC.
Frequency Range: Rated frequencies from 15 Hz to 400 Hz, as well as DC applications. Content of IEC 61869-1 IEC 61869-1 covers a
Output Types: Covers both traditional analogue outputs and modern digital interfaces. Core Technical Requirements
The IEC 61869-1 framework establishes high-level technical and conformity criteria that all instrument transformers must meet:
Performance Criteria: Defines permissible error limits, including accuracy class, ratio error, and phase angle displacement.
Environmental Conditions: Specifies requirements for both normal and special service conditions, including ambient temperature, altitude impacts, and vibration resistance.
Design & Construction: Outlines standards for materials, insulation (liquid, gas, or solid), earthing, and mechanical strength.
Safety: Includes rigorous requirements for fire hazard protection, internal arc fault protection, and corrosion resistance. The IEC 61869 Series Structure
The series was created to replace the older IEC 60044 standards, moving toward a more modular structure. A full standard for a specific product is composed of Part 1 (General Requirements) plus the specific part for that device.
Feature: IEC 61869-1 PDF Generator
Description: This feature allows users to generate a PDF document based on the IEC 61869-1 standard, which outlines the requirements for instrument transformers used in power systems.
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IEC 61869-1 is a standard for instrument transformers, specifically covering the requirements for voltage transformers. Here's a brief overview:
IEC 61869-1:2016 - Instrument transformers - Part 1: General requirements
This International Standard applies to instrument transformers with an analogue output, intended for use with electrical measuring instruments and electrical protective relays.
The standard covers the following aspects:
The standard replaces the previous IEC 60044-1 and IEC 60044-2 standards.
You can find the PDF of IEC 61869-1 on various websites, such as:
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While specific accuracy classes are detailed in part 2 (CTs) and part 3 (VTs), the general standard outlines the principles of accuracy testing, including burden, power factor, and frequency variation effects.
