1 Scope
This part specifies the basic requirements of classification and naming, service environment, technical requirements, test methods, inspection rules, marking, packaging and transportation of long rod composite insulators (hereinafter referred to as long rod suspension insulators and long rod post insulators respectively) for overhead contact system of power frequency single-phase AC 25kV electrified railways.
This part is applicable to tensile and anti-bending insulators for overhead contact system.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of TB/T 3199. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 191 Packaging - Pictorial Marking for Handling of Goods (GB/T 191-2000, eqv IS0 780:1997)
GB/T 528-1998 Rubber, Vulcanized or Thermoplastic - Determination of Tensile Stress - Strain Properties (eqv IS0 37:1994)
GB/T 529-1999 Rubber, Vulcanized or Thermoplastic - Determination of Tear Strength (Trouser, Angle and Crescent Test Pieces) (eqv ISO 34-1:1994)
GB/T 4056-1994 Coupling Dimensions of Suspension Insulators for High Voltage Lines (eqv IEC 60120:1984; IEC 60471:1977)
GB/T 6553-2003 Test Methods for Evaluating Resistance to Tracking and Erosion of Electrical Insulating Materials Used under Severe Ambient Conditions (IEC 60587:1984IDT)
GB/T 11352-1989 Carbon Steel Castings for General Engineering Purpose (NEQ IS0 3755:1991)
GB/T 13488-1992 Rubber - Determination of the Burning Behavior of Vertical Specimens (neq IEC 707:1981)
GB/T 19519-2004 Composite Insulators for A.C. Overhead Lines with a Nominal Voltage Greater than 1000V - Definitions, Test Methods and Acceptance Criteria (IEC 61109:1992, MOD)
GB/T 20142-2006 Composite Line Post Insulators for A.C. Overhead Lines with a Nominal Voltage Greater than 1000V - Definitions, Test Methods and Acceptance Criteria (IEC 61952:2002, MOD)
DL/T 859-2004 Artificial Pollution Tests on Composite Insulators Used on High-voltage AC Systems
JB/T 3384-1999 Sampling Plans for High Voltage Insulators
JB/T 8178-1999 Technical Specification of Cap for Cap and Pin Insulators
JB/T 8181-1999 Locking Devices for Ball and Socket Couplings of String Insulator Units
JB/T 9673 Packet of Insulators
TB/T 2007-1997 Pollution Grade Standards for Insulation of Electric Railway Contact Network
TB/T 2073-2003 Technical Specification of Fittings for Overhead Contact System in Electrification Railway
TB/T 2074-2003 Test Methods of Fittings for Overhead Contact System in Electrification Railway
TB/T 2075-2002 Fittings for Overhead Contact System in Electrification Railway
ISO 3452-1984 Non-destructive Testing - Penetrant Inspection - General Principles
3 Classification and Naming
3.1 Classification of insulators
Insulators are classified into tensile type used for suspension and tension resistance as well as anti-bending type used for supporting cantilever according to application mode.
Insulators are classified into ordinary type, reinforced insulation type and highly reinforced insulation type according to applicable pollution resistance degree.
Insulators are classified into single insulation structure type and double insulation structure type according to insulating mode.
Foreword i
1 Scope
2 Normative References
3 Classification and Naming
4 Technical Requirements
5 Test Methods
6 Inspection Rules
7 Marking, Packaging, Transportation and Storage
Annex A (Normative) Structure Dimension and Deviation of Metal Accessories at Insulator End
Annex B (Normative) Radiographic Flaw Detection Inspection Method of Metal Accessories
Annex C (Informative) Calibration of Insulator Rated Voltage at High Altitude
Annex D (Informative) Test and Assessment Method of Insulator Hydrophobicity
Annex E (Informative) Stress Corrosion Resistance Test of Insulator Core Rod
