Standard No.:	DL/T 810-2012
English Name:	Technical specification for long rod composite insulators with a nominal voltage of ±500KV DC and above
Chinese Name:	±500kV及以上电压等级直流棒形悬式复合绝缘子技术条件
Professional Classification:	DL    Professional Standard - Electricity
Source Content Issued by:	MEPRC
Issued on:	2012-4-6
Implemented on:	2012-7-1
Status:	valid
Superseding:	DL/T 810-2002 Technical specification for ± 500kV D.C long rod composite insulators
Target Language:	English
File Format:	PDF
Word Count:	12000 words
Translation Price(USD):	300.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the definitions, test methods, acceptance criteria, marking and packaging, and performance of housing and shed materials and core fittings of DC composite insulators (hereinafter referred to as "insulators"). This standard is applicable to the long rod composite insulators for ±500kV and above DC lines and converter stations, and DC long rod composite insulators of other voltage classes may refer to this standard, while line post insulator is beyond the application scope of this standard. Ambient temperature at installation site of insulator generally is -40℃~+40℃. Composite insulator specified in this standard refers to the one made by adopting high-temperature vulcanized silicon rubber on high-temperature resistant and acid-resistant core. This standard excludes requirements about the selection of insulator according to specific operating conditions. 2 Normative References The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition referred to apply. GB 311.1 Insulation Co-ordination for High Voltage Transmission and Distribution Equipment (GB 311.1-1997, IEC 71-1:1993, NEQ) GB/T 528 Rubber, Vulcanized or Thermoplastic - Determination of Tensile Stress-strain Properties (GB/T 528-2009, ISO 37:1994, IDT) GB/T 529 Rubber, Vulcanized or Thermoplastic - Determination of Tear Strength (Trouser, Angle and Crescent Test Pieces) (GB/T 529-2008, ISO 34-1:1994, MOD) GB/T 531.1-2008 Rubber Vulcanized or Thermoplastic - Determination of Indentation Hardness - Part 1: Duromerer Method (Shore Hardness) (GB/T 531.1-2008, ISO 7619-1:2004, IDT) GB/T 775.2 Test Method for Insulators - Part 2: Electrical Test Methods GB/T 1408.2 Electrical Strength of Insulating Materials - Test Methods - Part 2: Additional Requirements for Tests Using Direct Voltage GB/T 1692-2008 Vulcanized Rubber - Determination of the Insulation Resistivity GB/T 2900.5-2002 Electrotechnical Terminology - Insulating Solids, Liquids and Gases GB/T 2900.8-2009 Electrotechnical Terminology - Insulators GB/T 2900.19-1994 Electrotechnical Terminology - High-voltage Test Technique and Insulation Co-ordination GB/T 4056-2008 Ball and Socket Coupling Dimensions of String Insulator Units (IEC 60120:1984, IDT) GB/T 6553 Test Methods for Evaluating Resistance to Tracking and Erosion of Electrical Insulating Materials Used under Severe Ambient Conditions (GB/T 6553-2003, IEC 60587:1984, IDT) GB/T 10707-2008 Rubber - Determination of the Burning GB/T 16927.1 High-voltage Test Techniques - Part 1: General Definitions and Test Requirements (GB/T 16927.1-2011, IEC 60060-1:2010, MOD) GB/T 16927.2-1997 High-voltage Test Techniques - Part 2: Measuring Systems GB/T 18851.2-2008 Non-destructive Testing - Penetrant Testing - Part 2: Testing of Penetrant Materials (ISO 3452-2:2006, IDT) GB/T 19519 Composite Insulators for a.c. Overhead Lines with A Nominal Voltage Greater than 1,000V- Definitions, Test Methods and Acceptance Criteria GB/T 21421.1-2008 Composite String Insulator Units for Overhead Lines with A Nominal Voltage greater than 1,000V - Part 1: Standard Strength Classes and End Fittings GB/T 22707-2008 Artificial Pollution Tests on High-voltage Insulators to Be Used on d.c. Systems (IEC/TR 61245:1993, MOD) GB/T 24623-2009 Radio Interference Test on High-voltage Insulators GB/T 25318-2010 Locking Devices for Ball and Socket Couplings of String Insulator Units: Dimensions and Tests JB/T 11219.1-2011 End Fitting for Composite Insulator with A High Voltage Overhead Line - Part 1: End Fitting for String Insulator Units 3 Terms and Definitions For the purposes of this document, the terms and definitions given in GB/T 2900.5, GB/T 2900.8 and GB/T 2900.19 and the following apply. 3.1 composite insulator composite insulator is composed of at least two kinds of polymer insulating materials (i.e., core, and housing and sheds) and is also provided with end fitting 3.2 core

Foreword II 1 Scope 2 Normative References 3 Terms and Definitions 4 Marking 5 Test Classification 6 Design Test 7 Type Test 8 Sampling Test 9 Routine Test Annex A (Normative) Typical Conditions of Hydrophobicity Classification (HC Value) Annex B (Normative) Artificial Pollution Test Method - Solid-layer Method Annex C (Normative) Multiple-factor Test Annex D (Informative) Method for Dynamic Load Fatigue Test on Composite Insulator