Product Overview
The Power Transformer Terminal Safety Cover is a specialized power line hardware designed for critical hardware component for overhead power line construction, ensuring reliable mechanical and electrical performance. Widely recognized in the industry under alternative names including line fitting, overhead hardware, power fitting, line hardware, this product serves as a critical component in overhead power transmission and distribution systems systems. This product is made of silicone rubber, heat-shrinkable material and anti-aging high-molecular insulation material. It can effectively prevent various types of exposed joints, due to various factors (wet flashover, pollution flashover, salt fog chemical gas corrosion, human contact, small animals or debris bridging, etc.) causing phase-to-phase short circuit or ground fault resulting in power outage, damage to power equipment and electric shock accidents. Thereby ensuring safe operation of power equipment. This product has reasonable design, safe and reliable, easy to use. And passed Wuhan High Voltage Research Institute test qualification, its performance meets the requirements of national standard GB12168-90 “Shroud for Live Working”.
Advantages
- “Precision manufacturing” — CNC machining and forging processes ensure dimensional accuracy and consistent quality
- “Durable surface treatment” — hot-dip galvanizing per ISO 1461/ASTM A153 provides long-term corrosion protection
- “High mechanical strength” — designed to withstand rated breaking loads with appropriate safety margins
- “Standardized interfaces” — compatible with common insulator, conductor, and support hardware specifications
- “Field-proven reliability” — tested per IEC/GB standards for mechanical and electrical performance
Technical Parameters
| Category | Model | Matching Fitting Name | Cover | Remarks |
|---|
| Cover | Model | Connection Type | Wire Number×Specification | Applicable Transformer Capacity |
|---|
| High Voltage Incoming | D10-01 | Terminal Block | FT10-D02A | Horizontal | $1 \times {16} \sim {150}^{2}$ | 20~500kVA | Silicone Rubber |
| D10-04 | Terminal Block | FT10-D01A | Horizontal | $1 \times {16} \sim {95}^{2}$ | 20~500kVA | Silicone Rubber |
| D10-05 | Terminal Block | FT10-D05B | Angled | $2 \times {16} \sim {95}^{2}$ | 20~500kVA | Silicone Rubber |
| D10-06 | Terminal Block | FT10-D06AB | Horizontal Angled | $1 \times {16} \sim {95}^{2}$ | 20~500kVA | Silicone Rubber |
| D10-07 | Terminal Block | FT10-D07B | Angled | $2 \times {16} \sim {95}^{2}$ | 10~630kVA | Silicone Rubber |
| D10-08 | Terminal Block | FT10-D08AB | Horizontal Angled | $2 \times {16} \sim {95}^{2}$ | 10~630kVA | Silicone Rubber |
| D10-09 | Terminal Block | FT10-D09B | Angled | $1 \times {16} \sim {95}^{2}$ | 10~630kVA | Silicone Rubber |
| Category | Model | Matching Fitting Name | Cover | Remarks |
|---|
| Cover | Cover Model | Connection Type | Wire Number×Specification | Applicable Transformer Capacity |
|---|
| Low Voltage Outgoing | G1-02 | M16 Oil Transformer Clamp 30° | FT1-G01B | Angled | $1 \times {35}^{2} \sim {240}^{2}$ | 20~500kVA | Silicone Rubber |
| G1-10 | M22 Oil Transformer Clamp 30° | FT1-G05B | Angled | $1 \times {35}^{2} \sim {240}^{2}$ | 20~500kVA | Silicone Rubber |
| G1-20 | M22 and Below Double Groove Oil Transformer Clamp 30° | FT1-G20B | Angled | $1 \times {95}^{2} \sim {240}^{2}$ | 10~630kVA | Silicone Rubber |
| Category | Model | Matching Fitting Name | Cover | Remarks |
|---|
| Cover | Model | Connection Type | Wire Number×Specification | Applicable Transformer Capacity |
|---|
| Low Voltage Outgoing | G1-12 | M16 Oil Transformer Clamp 0° | FT1-G12A | Horizontal | $1 \times {35}^{2} \sim {240}^{2}$ | 20~400kVA | Silicone Rubber |
| G1-22 | M22 Oil Transformer Clamp 0° | FT1-G22A | Horizontal | $1 \times {35}^{2} \sim {150}^{2}$ | 20~400kVA | Non-Heat-Shrinkable |
| Category | Model | Matching Fitting Name | Cover | Remarks |
|---|
| Cover | Model | Connection Type | Wire Number×Specification | Applicable Transformer Capacity |
|---|
| High Voltage Incoming | G10-01 | M16 and Below Oil Transformer Clamp | FT10-G01B | Angled | $1 \times {16}^{2} \sim {120}^{2}$ | 20~500kVA | Silicone Rubber |
| G10-03 | M22 and Below Oil Transformer Clamp | FT10-G05B | Angled | $1 \times {16}^{2} \sim {240}^{2}$ | 20~500kVA | Silicone Rubber |
| G10-02 | 0°C Equipment Clamp 1,2 No. Single 0°C Hole Oil Transformer Clamp | FT10-G04A | Horizontal | $1 \times {16}^{2} \sim {70}^{2}$ | 20~500kVA | Silicone Rubber |
| G10-06 | Oil Transformer Clamp 30 M16 and | FT10-G06B | Angled | $2 \times {16}^{2} \sim {240}^{2}$ | 10~630kVA | Silicone Rubber |
| G10-07 | Below Oil Transformer Clamp | FT10-G07B | Angled | $1 \times {16}^{2} \sim {120}^{2}$ | 10~630kVA | Silicone Rubber |
| G10-20 | M22 and Below Double Groove Oil Transformer Clamp | FT10-G20B | Angled | $2 \times {16}^{2} \sim {240}^{2}$ | 10~630kVA | Silicone Rubber |
| Category | Model | Matching Fitting Name | Cover | Remarks |
|---|
| Cover | Model | Connection Type | Wire Number×Specification | Applicable Transformer Capacity |
|---|
| Low Voltage Outgoing | D1-01 | Terminal Block | FT1-D01A | Horizontal | $1 \times {35}^{2} \sim {95}^{2}$ | 20~500kVA | Silicone Rubber |
| D1-02 | Terminal Block | FT1-D02A | Horizontal | $1 \times {35}^{2} \sim {150}^{2}$ | 20~500kVA | Silicone Rubber |
| D1-11 | Terminal Block | FT1-D03A | Horizontal | $1 - 2 \times {120}^{2} \sim {240}^{2}$ | 20~500kVA | Silicone Rubber |
| D1-12 | ${30}^{ \circ }$ Terminal Block | FT1-D04B | Angled | $1 - 2 \times {120}^{2} \sim {240}^{2}$ | 20~500kVA | Silicone Rubber |
| Category | Model | Matching Fitting Name | Cover | Remarks |
|---|
| Cover | Model | Connection Type | Wire Number×Specification( mm2 ) | Applicable Transformer Capacity |
|---|
| High Voltage Incoming | S10-01 | Equipment Clamp 1,2 No. $0^\circ$ | FT10-S01A | Horizontal | $1 \times 2 \sim 70^2$ | 20~500kVA | Silicone Rubber |
| S10-02 | Equipment Clamp 1,2 No. $30^\circ$ | FT10-S02B | Angled | $1 \times 2 \sim 70^2$ | 20~500kVA | Silicone Rubber |
| S10-03 | Equipment Clamp 3,4 No. $0^\circ$ | FT10-S03A | Horizontal | $1 \times 2 \sim 150^2$ | 20~500kVA | Silicone Rubber |
| S10-04 | Equipment Clamp 3,4 No. $30^\circ$ | FT10-S04B | Angled | $1 \times 2 \sim 150^2$ | 20~500kVA | Silicone Rubber |
| S10-07 | Equipment Clamp 3,4 No. $30^\circ$ | FT10-S07B | Angled | $1 \times 2 \sim 240^2$ | 20~500kVA | Silicone Rubber |
| S10-09 | Equipment Clamp 3,4 No. $0^\circ$ | FT10-S09A | Horizontal | $1 \times 95 \sim 240^2$ | 100~800kVA | Silicone Rubber |
| Category | Model | Matching Fitting Name | Cover | Remarks |
|---|
| Cover | Model | Connection Type | Wire Number×Specification | Applicable Transformer Capacity |
|---|
| Low Voltage Outgoing | S1-01 | Equipment Clamp 1-2 No. 0° | FT1-S05A | Horizontal | $1 \times {35}^{2} \sim {95}^{2}$ | 20~500kVA | Silicone Rubber |
| S1-02 | Equipment Clamp 1-2 No. 30° | FT1-S06B | Angled | $1 \times {35}^{2} \sim {95}^{2}$ | 20~500kVA | Silicone Rubber |
| S1-11 | Equipment Clamp 3-4 No. 0° | FT1-S03A | Horizontal | $1 \times {120}^{2} \sim {240}^{2}$ | 20~500kVA | Silicone Rubber |
| S1-12 | Equipment Clamp 3-4 No. 30 | FT1-S04B | Angled | $1 \times {120}^{2} \sim {240}^{2}$ | 20~500kVA | Silicone Rubber |
| Category | Model | Matching Fitting Name | Cover | Remarks |
|---|
| Cover | Model | Connection Type | Wire Number×Specification | Applicable Transformer Capacity |
|---|
| Low Voltage Outgoing | S1-21 | Equipment Clamp 1-2 No. 0° | FT1-S21A | Horizontal | 1-2×162~1502 | 10~100kVA | Silicone Rubber |
| S1-22 | Equipment Clamp 1-2 No. 30° | FT1-S22B | Angled | 1-2×162~1502 | 10~100kVA | Silicone Rubber |
| Category | Model | Matching Fitting Name | Cover | Remarks |
|---|
| Cover | Model | Connection Type | Wire Number×Specification | Applicable Transformer Capacity |
|---|
| Low Voltage Outgoing | M1-01 | Equipment Clamp 1-2 No. 0° | FT1-M01 | Horizontal | 1×6×60 | 10~100kVA | Silicone Rubber |
| M1-02 | Equipment Clamp 1-2 No. 30° | FT1-M02 | Horizontal | 1×6×60 | 10~100kVA | Silicone Rubber |
| Category | Model | Matching Fitting Name | Cover | Remarks |
|---|
| Cover | Model | Connection Type | Wire Number×Specification | Applicable Transformer Capacity |
|---|
| Low Voltage Outgoing | GM1-01A | M22 Oil Transformer 60 Busbar | FT1-GM01 | Horizontal | 1×10×60 | 10~630kVA | Silicone Rubber |
| GM1-02A | M22 Oil Transformer 100 Busbar | FT1-GM02A | Horizontal | 1×10×100 | 10~630kVA | Silicone Rubber |
| GM1-02C | M22 Oil Transformer 100 Busbar | FT1-GM02C | Vertical | 1×10×100 | 10~630kVA | Silicone Rubber |
| GM1-02B | M22 Oil Transformer 100 Busbar | FT1-GM02B | Angled | 1×10×100 | 10~630kVA | Silicone Rubber |
| Category | Model | Matching Fitting Name | Cover | Remarks |
|---|
| Cover | Model | Connection Type | Wire Number×Specification | Applicable Transformer Capacity |
|---|
| High Voltage Incoming | DB10-01 | Composite Zinc Oxide Arrester+Terminal Block | FT10-DB01 | Horizontal | $1 \times {16}^{2} \sim {95}^{2}$ | 6~10kV Distribution Type | Silicone Rubber |
| DB10-02 | FT10-DB02 | Horizontal | $2 \times {16}^{2} \sim {95}^{2}$ | 6~10kV Distribution Type | Silicone Rubber |
| DB10-04 | FT10-DB04 | Horizontal | $2 \times {16}^{2} \sim {95}^{2}$ | 6~10kV Distribution Type | Silicone Rubber |
| DB1-01 | FT1-DB05 | Horizontal | $2 \times {16}^{2} \sim {240}^{2}$ | 220~380V | Silicone Rubber |
| DB10-03 | Valve Type Arrester | FT10-DB03 | Vertical | $1 \times {16}^{2} \sim {240}^{2}$ | 6~10kV Distribution Type | Silicone Rubber |
| Category | Model | Matching Fitting Name | Cover | Remarks |
|---|
| Cover | Model | Connection Type | Wire Number×Specification | Applicable Transformer Capacity |
|---|
| High Voltage Incoming | M10-01 | 60 × 6 and Below Busbar | FT10-M03 | Horizontal | 1 × 6 × 60 | 10~630kV | Silicone Rubber |
| S1-08 | JLS-10 Metering Box Terminal Clamp Type | FT10-S08 | Three-way | 3 × 162~952 | | Silicone Rubber |
| Low Voltage Outgoing | MB-01 | B3 Parallel Groove Clamp+Busbar | FT1-MB01 | Horizontal | 2 × 502~2402 | 10~630kV | Silicone Rubber |
| Category | Model | Matching Name | Cover | Remarks |
|---|
| Cover | Model | Matching Fitting Name | Connection Type |
|---|
| High (Low) Voltage Incoming | S10-10 | 10kV Vacuum Circuit Breaker Insulation Cover ZW32-12G/630-20 | F10-S10B | Equipment Clamp 3,4 No. 30° | Angled | Silicone Rubber |
| SB35-01 | 35kV Station Type Arrester Insulation Cover | F35-SB01B | Equipment Clamp 3,4 No. 30° | Angled |
| S35-12 | 35kV Transformer Insulation Cover | FT35-S12B | Equipment Clamp 3,4 No. 30° | Angled |
| S35-11 | Disconnector Insulation Cover GW5-35 II D(W)630 | S35-S11B | Equipment Clamp 3,4 No. 30° | Angled |
| TX-01 | Parallel Groove Clamp Cover | / | / | Horizontal |
| JB-4 | Double In Double Out Parallel Groove Clamp Cover | / | Horizontal Connection | Horizontal |
| D1-05 | Terminal Block | FT10-D05A | Terminal Block | Horizontal |
| S1-13 | Double Aperture Cover | FT1-S13 | / | Horizontal |
| D10-27 | Metering Box Bidirectional Cover | FT10-D27A | Terminal Block | Horizontal |
| XC01 | 110kV Suspension Clamp Insulation Cover | F110-XC01 | XGU Suspension Clamp | / |
| T01 | / | FT1-01 | M22 Oil Transformer Clamp | Vertical |
| D1-03 | Terminal Block | FT10-D03A | Terminal Block | Horizontal |
| S10-13 | Single Aperture Cover | FT10-S13 | / | Horizontal |
| TX-01 | T-type Clamp Insulation Cover | F-TX01 | T-type Clamp | / |
| ZW20A-1224 | Outdoor Vacuum Circuit Breaker | FT10-S1224 | Equipment Clamp 3,4 No. 30° | Angled |
| G1-03 | 10kV Distribution Transformer Low Voltage 60° Outgoing Protection Cover | FT1-G03 | M22 Oil Transformer 100 Busbar | Angled |
| G10-04 | Double Outgoing Cover | FT10-T04C | M16 and Below Oil Transformer Clamp | Angled |
| T03 | Brass Clamp Cover | FT10-T03 | Equipment Clamp 1,2 No. 0° | Horizontal |
| AP01 | Wedge-type Clamp Insulation Cover | F-AP01 | JXL Wedge-type Clamp | / |
| S10-14 | Vacuum Switch Short Copper Bar Connection 3#,4# Equipment Clamp First Vertical Connection Insulation Cover | FT10-S14 | Equipment Clamp 3,4 No. 0° | Vertical |
| T02 | Equipment Clamp Cover | FT10-02 | Equipment Clamp 3,4 No. | / |
| GY-1 | Grounding Wire Trail Customization | FT-GY01 | Customization | / |
Note: Dimensions may vary slightly based on manufacturing tolerances. Contact our engineering team for custom sizes or special requirements.
Material & Manufacturing
- Material: high-quality carbon steel, cast iron, or aluminum alloy
- Secondary components: hot-dip galvanized finish
- Surface treatment: Hot-dip galvanizing in accordance with ISO 1461 / ASTM A153 / IEC 61589, minimum zinc coating thickness 65 μm
- Manufacturing process: Precision forging, casting, or CNC machining of critical dimensions, followed by full galvanizing immersion. Dimensional accuracy controlled within ±0.5 mm tolerance on mounting interfaces
- Quality assurance: Every batch undergoes dimensional inspection, galvanizing thickness testing (magnetic or gravimetric method per ISO 2178), and visual surface examination. Mill test certificates (MTC) available upon request
Application Scope
- Critical hardware component for overhead power line construction, ensuring reliable mechanical and electrical performance
- Overhead transmission and distribution line construction
- Power grid upgrade and renovation projects
- Industrial and utility pole hardware assembly
Frequently Asked Questions
Q: What materials are used?
A: Depending on the product type, materials include carbon steel, malleable cast iron, forged steel, cast aluminum alloy, or copper alloy. All components have hot-dip galvanized or equivalent corrosion protection.
Q: Are custom sizes available?
A: We offer non-standard sizes and custom specifications for special project requirements. Contact our engineering team with your drawings or specifications.
Q: What quality certifications do you have?
A: Products are manufactured under ISO 9001 certified quality management system. Mill test certificates (MTC) and third-party inspection reports are available upon request.
Industry Standards & Compliance
| Standard | Scope |
|---|
| IEC 61589 | Galvanizing requirements for overhead line hardware |
| ISO 1461 | Hot-dip galvanized coatings on iron and steel articles |
| ASTM A153 | Zinc coating (hot-dip) on iron and steel hardware |
| GB/T 2314 | General requirements for overhead line fittings |
| GB/T 2317 | Mechanical testing methods for overhead line hardware |
| DL/T 765.2 | Suspension and strain hardware for overhead power lines |