GB/T 10230.2-2025Tap-changers - Part 2: Application guidelines (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is Part 2 of GB/T 10230 "Tap switches". GB/T 10230 has already published the following parts.

---Part 1: Performance Requirements and Test Methods;

---Part 2: Application Guidelines this document replaces GB/T 10230.2-2007 "Tap switches - Part 2: Application guidelines" and is consistent with GB/T 10230.2-2007.

Compared to previous versions, aside from structural adjustments and editorial changes, the main technical changes are as follows.

---Added the terms "linear non-excitation tap changer", "rotary non-excitation tap changer", "fusion", and "continuous uninterrupted operation".

and definition (see Chapter 3);

---The application of tap changers in transformers and reactors has been added (see Chapter 5);

---Added information on the working principle of on-load tap changers, their actual layout, the types of off-load tap changers, and their applications in transformers.

Position within the enclosure or housing of the transformer, gas-filled tap changer, stepper regulator, lead/lag switch, and other components used in distribution transformers.

On-load tap changers (see 6.1.2, 6.1.3, 6.2.2, 6.2.3, 6.3.3, 6.4.3, 6.4.4, 6.4.5);

---Changes were made to the types of on-load tap changers and the content regarding electronic tap changers, replacing oil-immersed tap changers with the term "tap changer environment".

Dry-type tap changers (see 6.1, 6.3, 6.4, 5.2, 5.4, 5.5 and Chapter 7 of the 2007 edition);

---The selection of on-load tap changers has been changed (see 7.2, 6.2 in the 2007 edition);

---Added information on the application of on-load tap changers and other important parameters of on-load tap changers (see 7.3, 7.4);

---The selection of the no-load tap changer has been changed (see 8.2, 6.3 in the 2007 edition);

---Added information on the application of non-excited tap changers and other important parameters of non-excited tap changers (see 8.3, 8.4);

---The protection device for the on-load tap changer has been modified (see 9.2, 9.4, 9.5, 9.6, 9.7, 9.8, and 5.7 of the 2007 edition);

---A pressure rise protection device has been added to the SF6 changeover switch or selector switch (see 9.3);

---The dehumidifier and auxiliary maintenance devices have been modified (see 10.5, 10.7, and 8.6 and 8.5 in the 2007 edition);

---An oil filtration device has been added (see 10.6);

---Added information on the storage and installation of tap changers (see Chapter 11);

---Added debugging (see 12.1);

---Field services have been modified (see 12.2, 12.3, 12.4; 9.1, 9.2, 9.3 of the 2007 version);

---The protected section (11.1 of the 2007 version) has been removed;

---The security content has been changed (see Chapter 13, 11.2 and 11.3 of the 2007 edition);

---The required information for on-load tap changers and off-load tap changers during the inquiry or ordering stage has been revised (see 14.1, 14.2, 2007 edition).

10.1, 10.2).

This document is modified to adopt IEC/IEEE 60214-2.2019 "Tap switches - Part 2: Application guidelines".

Compared with IEC/IEEE 60214-2.2019, this document has undergone the following structural adjustments.

---Chapter 3 corresponds to section 3.1 of the original IEC text, where sections 3.1 to 3.4 correspond to sections 3.1.1 to 3.1.4 of the original IEC text, respectively;

---Chapter 4 corresponds to section 3.2 of the original IEC text;

---Chapter 4 of the original IEC text has been deleted;

---In section 5.2, Figure 1 in the original IEC text was changed to Figure 1a), and Figures 1b) and 1c) were added.

---Figure 10e has been added in 6.1.2.1.3.1).

---Added version 6.1.2.1.3.7.

The technical differences between this document and IEC/IEEE 60214-2.2019, and the reasons therefor, are as follows.

---The original IEC document is compatible with both IEC and IEEE standards. This document only uses the content of the IEC standard.

All technical content related to IEEE standards (including ASTM standards) has been removed to conform to my country's actual situation;

---GB/T 2900.95 (see Chapter 3) has been used in place of IEC 60050-421 (see Chapter 3) to adapt to my country's technical conditions;

---IEC 60296 (see 6.3.1.1~6.3.1.3, 7.4.7.1 and 9.5) has been replaced with the normatively referenced GB/T 2536 to suit my needs.

The country's technological conditions;

---GB/T 1094.11 (see 6.3.2) has been replaced with the normatively referenced GB/T 1094.11 to adapt to my country's technical conditions;

---IEC 60076-7 (see 7.2.1.3.2, 7.4.7.2, 8.2.1.2 and 14.1) has been replaced by the normatively referenced GB/T 1094.7.

Adapting to my country's technological conditions;

---IEC 60076-6 has been changed from a reference to a normative reference, and GB/T 1094.6, which adopts the international standard, has been modified.

A substitution was made (see 7.3.6) to suit my country's actual situation;

---GB/T 17623 (see 12.4.2.3.1) has been replaced with the normatively referenced GB/T 17623 to adapt to my country's technical conditions;

---Change IEC 60475 from a reference to a normative reference, and use GB/T 41146, which adopts the international standard, instead.

A replacement was implemented (see 12.4.2.3.1) to suit my country's actual situation;

---GB 507 (see 12.4.2.3.3) has been replaced with the normatively referenced GB 507 to adapt to my country's technical conditions;

---IEC 60422 and IEC 60599 have been changed from references to normative references (see 12.4.2.3.2~12.4.2.3.4) to...

It conforms to my country's actual situation;

---Added two common tap switches for star-connected windings. "tap switch for mid-range voltage regulation" and "tap switch for line-end voltage regulation".

The layout diagram should be revised, and all instances of "LV" in Figure 4 and related text should be changed to "MV" to reflect the actual situation in my country (see [link]).

---Change "The toggle switch operates within a time range of approximately 50ms to 150ms" to "The toggle switch operates within a time range of approximately 40ms to 150ms".

Within a specific timeframe, to align with my country's actual circumstances (see 6.1.2.1.1);

---Added a basic switching mode and phase control. "The switching switch has two transition resistors and two VIs, using operation cycle number 1 or 2".

The corresponding connection diagram [see Figure 10e] should be adapted to suit my country's actual situation.

---Added the technology of "using a switching switch with two transition resistors and two vacuum interrupters (VI) with operating cycle number 1 or 2".

To accommodate my country's actual situation (see 6.1.2.1.3.7);

---Added "Synchronization time requirements shall be determined by the user and the manufacturer through negotiation based on different application scenarios" to ensure that the switching switch or selection Synchronous operation of the selector switch (see 7.3.9);

---Added the requirement that when considering the layout of the oil conservator system, the "transformer body oil pressure should be higher than the OLTC's highest oil level" should be met.

The oil pressure requirement was adjusted, and the equivalent height of the maximum residual pressure in the corrugated metal oil tank was added to the factors considered.

To accommodate my country's actual situation (see 7.4.2);

---Added the clause. "At the gas collection location of the OLTC mounting flange, a gas collection interface connected to the transformer body gas relay should be provided." Requirements should be made to conform to my country's actual situation (see 10.2);

---The "Other information that needs to be provided or explained by the transformer manufacturer" has been added to the general information required during the OLTC inquiry or ordering stage.

"Materials" to improve the technical content (see 14.1);

---The "Other information that needs to be provided or explained by the transformer manufacturer" has been added to the general information required during the DETC inquiry or ordering stage.

"Materials" to improve the technical content (see 14.2.1).

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Electrical Equipment Industry Association.

This document is under the jurisdiction of the National Technical Committee on Transformer Standardization (SAC/TC44).

Introduction

The purpose of establishing standards for tap changers is to create a set of optimal evaluation criteria for tap changers, guiding the selection of production materials, etc.

This provides guidance on precautions for product design, production, inspection, selection, and operation and maintenance. GB/T 10230 the aim is to establish guiding principles and relevant rules applicable to the design, manufacture, testing methods, operation and maintenance of tap changers, and it is proposed that these be implemented by two departments.

Composition.

---Part 1: Performance Requirements and Test Methods. The purpose is to establish applicable standards for the design, manufacture, and production testing of various tap changers.

The general principles and relevant rules that need to be followed.

---Part 2: Application Guidelines. The purpose is to further expand the technical content of various tap changers and to guide the selection of tap changers.

Provide guidance on selection and application.

GB/T 10230 clarifies the technical requirements and test items for various tap changer products in two parts, and provides specific test details.

Procedures, testing methods, and operational guidelines. By establishing clear scope, terminology, technical requirements, and testing methods for various products, manufacturers and...

Users and related testing personnel can operate the equipment clearly and accurately, thereby designing and manufacturing high-quality products and promoting trade, exchange, and technology.

Technical cooperation will ensure the normal operation of transformer products.

This document provides recommendations for tap changer manufacturers, transformer manufacturers, and end users. When using this document, consider tap changers...

The manufacturer's recommendations and instructions shall prevail.

These recommendations apply to typical tap changers in production at the time this document was published. However, much of the information also applies to earlier designs.

It should be emphasized that the responsibility of the transformer manufacturer lies in correctly connecting the assembled tap changer to the transformer.

Tap Changer Part 2: Application Guidelines

1 Scope

This document provides relevant information on GB/T 10230.1, including reference documents, definitions, requirements, selection, and usage, which will be helpful to all parties involved.

Learn more about the various types of tap changers and their accessories.

This document applies to on-load tap changers (OTCs) connected to the tap windings of transformers, reactors, etc., that conform to GB/T 10230.1.

Technical guidance is provided for the selection and use of resistive and reactive tap changers and non-excitation tap changers.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 507 Determination of breakdown voltage of insulating oil (GB/T 507-2002, IEC 60156:1995, IDT) GB/T 1094.1-2013 Power Transformers - Part 1: General (IEC 60076-1:2011, MOD) Note. There are no technical differences between the content referenced in GB/T 1094.1-2013 and the content referenced in IEC 60076-1:2011.

GB/T 1094.3-2017 Power Transformers - Part 3: Insulation Levels, Insulation Tests and External Insulation Air Gap (IEC 60076-3:2013, MOD) Note. There are no technical differences between the content referenced in GB/T 1094.3-2017 and the content referenced in IEC 60076-3:2013.

GB/T 1094.5-2008 Power Transformers - Part 5: Short Circuit Withstand Capacity (IEC 60076-5:2006, MOD) Note. There are no technical differences between the content referenced in GB/T 1094.5-2008 and the content referenced in IEC 60076-5:2006.

GB/T 1094.6 Power Transformers - Part 6: Reactors (GB/T 1094.6-2011, IEC 60076-6:2007, MOD) GB/T 1094.7 Power Transformers - Part 7: Load Guidelines for Oil-Immersed Power Transformers (GB/T 1094.7-2024, IEC) 60076-7.2018, MOD) GB/T 1094.11 Power Transformers - Part 11: Dry-type Transformers (GB/T 1094.11-2022, IEC 60076-11) 2018, MOD) GB 2536 Unused mineral insulating oil for electrical fluid transformers and switches (GB 2536-2011, IEC 60296.

2003, MOD)

GB/T 2900.95 Electrical Engineering Terminology. Transformers, Voltage Regulators and Reactors (GB/T 2900.95-2015, IEC 60050-421) 1990, NEQ) GB/T 10230.1-2019 Tap changers - Part 1: Performance requirements and test methods (IEC 60214-1:2014, MOD) Note. There are no technical differences between the content referenced in GB/T 10230.1-2019 and the content referenced in IEC 60214-1:2014.

GB/T 17623 Gas Chromatography Determination of Dissolved Gas Components in Insulating Oil GB/T 41146 Sampling Method for Insulating Liquids (GB/T 41146-2021, IEC 60475:2011, IDT) IEC 60076-21 Power Transformers - Part 21: Standard requirements, terminology and test procedures for stepper regulators (Power tors)