The model designation for power line fittings is typically composed of an initial letter, followed by an auxiliary letter, and finally, the main technical parameters. Common model designations for power line fittings are generally structured as follows:
I. Tension Clamps
1. Installation Method: B-Explosive-compression type; L-Bolted type; T-Crimping type; X-Wedge type; Y-Hydraulic type; J-Preformed type.
2. Conductor Type: (Default) Indicates Aluminum Conductor Steel Reinforced (ACSR).
II. Suspension Clamps
1. Grip Type: G-Fixed grip; K-Sliding grip; W-Limited grip.
2. Relative Position of Pivot Center to Conductor Axis: (Default) Indicates "Drooping" style; K-"Upward-bearing" style; Z-"Center-pivot" style.
3. Corona Shielding Performance: D-Special grade; C-High grade; B-Medium grade; A-Standard grade.
4. Body Material: (Default) Indicates Aluminum Alloy; K-Malleable Cast Iron; Q-Ductile Iron; 6-Cast Steel.
III. Splicing Fittings
1. Installation Method: B-Explosive-compression type; G-Parallel-groove clamp; L-Bolted type; T-Crimping type; X-Repair sleeve/strip; Y-Hydraulic type; J-Preformed type.
2. Steel Core Splicing Method: (Default) Indicates Butt-splicing; D-Overlap-splicing.
3. Conductor Type: (Default) Indicates Aluminum Conductor Steel Reinforced (ACSR); refer to standard tool specifications.
IV. Connecting Fittings
(1) Spacers
1. Spacer Structure Type: G-Rigid spacer; R-Flexible spacer; Z-Damping spacer.
2. Frame Shape: (Default) Indicates Regular Polygon; S-Cross-shaped; J-Rectangular; T-Trapezoidal; Y-Circular/Ring-shaped.
3. Number of Sub-conductors (Bundling): Indicated by a numerical digit.
4. Corona Shielding Performance: D-Special grade; C-High grade; B-Medium grade; A-Standard grade.
(2) Vibration Dampers
1. Vibration Damper Structure Type: D-Symmetrical type; R-Asymmetrical type.
2. Damper Weight Structure Type: G-Torsional type (Dog-bone shape); T-Cylindrical type; Y-Tuning-fork type; Z-Bell-jar type.
3. Vibration Damper Clamp Type: (Default)-Bolted clamp; J-Preformed clamp.
4. Applicable Conductor Outer Diameter: Indicated by a combination code.
5. Conductor Type: G-Steel strand; (Default)-Other conductor types.
6. Corona Shielding Performance: (Default)-No corona shielding; D-Special grade; C-High grade; B-Medium grade; A-Standard grade.
(3) Shielding Rings
1. (Default)-For suspension insulator strings; N-For tension insulator strings.
2. (Default)-For transmission lines; B-For substations.
3. J-Mounted on spacers; (Default)-Other mounting methods.
(4) Grading & Shielding Rings
1. (Default)-For suspension insulator strings; N-For tension insulator strings.
2. Insulator Orientation: (Default)-Upright mounting; D-Inverted mounting.
(5) Grading Rings
1. Voltage Level: 10–1000 kV; 8-±800 kV; 7-750 kV; 6-±660 kV; 5-500 kV / ±500 kV; 3-330 kV.
2. Insulator String Type: X-I-type suspension string; V-V-type suspension string; N-Tension string.
3. Number of Insulator Units: 1, 2, 3...
4. Insulator Type: (Default)-Disc type; H-Composite insulator.
5. Insulator Unit Spacing: (Default)-Single unit spacing.
6. Additional Letters: D-For inverted insulator strings; T-Cross-shaped suspension link plate; B-Substation application.
(6) T-Connectors
1. Main Conductor Connection Type: L-Bolted Type; Y-Compression Type.
2. Tap-off Conductor Connection Type: B-Diverter Plate; L-Bolted Type; Y-Compression Type.
3. Number of Main Conductors: Default indicates a single conductor; two or more conductors are indicated by a numeral (e.g., "2" indicates a double-conductor configuration).
(7) Equipment Clamps
1. Conductor Connection Type: L-Bolted Type; Y-Compression Type.
2. Terminal Pad Material: Default indicates Aluminum; G-Copper-Aluminum Transition.
3. Number of Conductors: Default indicates a single conductor; S-Double-conductor.
(8) Channel Busbar Fixing Fittings
Installation Location: N-Indoor; W-Outdoor.
(9) Armor Rods
Armor Rod Material Type: Default indicates Aluminum Alloy; B-Aluminum-Clad Steel; G-Steel.
(10) Counterweights
1. Material Type: Default indicates Cast Iron; G-Steel.
2. Anti-Corrosion Treatment: Default indicates Painted; D-Galvanized.
(11) Rectangular Busbar Fixing Fittings
1. Installation Location: N-Indoor; W-Outdoor.
2. Mounting Orientation: L-Vertical; P-Horizontal.
(12) Tubular Busbar Fixing Fittings
Fixing Type: Default indicates Fixed Type; H-Rotary-Sliding Type; X-Suspension Type; Z-Rotary-Fixed Type.
(13) Tubular Busbar T-Connectors
1. C-Tap-off via Terminal Pad; L-Tap-off via Bolted Type; P-Tap-off via Terminal Pad (with the tap-off face lying on the same horizontal plane as the tubular busbar axis); Y-Tap-off via Compression Type (with the tap-off face perpendicular to the tubular busbar axis).
2. Number of Diverter Plates (when using Terminal Pad tap-off): Default indicates a Single Plate; S-Double Plate.
(14) Tubular Busbar End Caps (Corona Balls)
If of the Damping Type, it is indicated by the letter Z.
(15) Tubular Busbar End Cap
If of the damped type, it is denoted by the letter Z.
(16) Tubular Busbar Support
Number of tubular busbars: Default indicates support for a single tubular busbar; S indicates support for two tubular busbars.
(17) Tubular Busbar Joint
Joint type: N-Internal joint; W-External joint.
(18) Tubular Busbar Equipment Clamp
1. Equipment clamp type: Default indicates fixed type; S indicates expansion type.
2. Terminal pad material: Default indicates aluminum; G indicates copper-aluminum transition.
(19) Tubular Busbar Expansion Clamp
1. Default indicates with support; W indicates without support.
2. Fixing method (when supported): G-Fixed type; H-Sliding type; Z-Combined type.
(20) Tubular Busbar Vibration Damper Ring
1. [No specific letter]: Indicates the fixed contact is perpendicular to the busbar centerline; P: Indicates the fixed contact is parallel to the busbar centerline.
2. Default indicates non-corona-shielded; F indicates corona-shielded.
(21) Flexible Busbar Spacer
1. Number of sub-conductors: Default indicates a bundle of two.
2. Flexible busbar outer diameter: Indicated by a conductor diameter combination code (refer to the relationship between the combination code and diameter D).
(22) Flexible Busbar Combination Ring
Number of load-bearing conductors: Indicated by a numeral.
(23) Flexible Busbar Fixing Hardware
Flexible busbar outer diameter: Indicated by a conductor diameter combination code (refer to the relationship between the combination code and diameter D).
(24) Crossing Busbar Hardware
Connection method between tubular busbar and equipment: B-Aluminum foil transition connection; J-Stranded conductor transition connection.