The Electrical Power 3 Hole Yoke Plate is mainly used for connection, fixation, branching, and tension transmission. With its simple structure, stable load-bearing capacity, and adaptability, it solves key problems such as conductor tension dispersion, direction adjustment, and branch connection, ensuring the safety and stability of power transmission. When designing it, attention needs to be paid to the compatibility of load, material, and hole position in order to give full play to its performance advantages.
Body: Primarily serves a load-bearing function during use, and is typically rectangular or triangular in shape. The thickness is determined by the rated load;
Mounting Holes: Commonly arranged in a "1+2" configuration, these are round holes designed to accommodate bolt and pin connections, with chamfered edges on the hole walls;
Material: Hot-dip galvanized low-carbon steel or stainless steel are usually chosen. Low-carbon steel is mainly Q235 and Q345, which has high strength and low cost during use. Through hot-dip galvanizing, it can resist atmospheric corrosion. Stainless steel is 304 and 316L stainless steel, which has extremely strong corrosion resistance, moderate strength and long service life;
Rated Load：10kN,20kN,50kN,100kN,200kN;
Hole Diameter：M12,M16,M20,M24;
Hole Spacing: 50mm, 80mm, 100mm;
Operating Temperature: -40℃ to +80℃.
The material of the Electrical Power 3 Hole Yoke Plate determines its mechanical properties, environmental resistance, and service life, directly affecting the safety, stability, and operation and maintenance costs of the power system. We will analyze the differences in composition and characteristics of different materials in detail below:
| Material | Mechanical properties | Corrosion resistance | Adapted scenarios | Advantages |
| Q235/Q345 |
1. Medium tensile strength (370-510MPa), rated load is mostly 10-50kN, meeting the tension requirements of medium and low voltage lines; 2. Good toughness, not easily brittle at low temperatures (above -20℃), but fatigue resistance is average (stress concentration is prone to occur with long-term vibration); |
The zinc coating (thickness ≥ 85 μm) can resist ordinary atmospheric corrosion (dry/semi-humid areas), but is not resistant to salt spray, acid and alkali media; | 110kV and below medium and low voltage lines, ordinary inland environments | Low cost, good processability, and easy installation. |
| 304/316L |
1. Moderate tensile strength (304: ≥515MPa; 316L: ≥485MPa), rated load 10-100kN, meeting the requirements of medium and high voltage lines; 2. Excellent fatigue resistance and toughness, able to withstand high-frequency vibrations in wind farms/rail transit, with no risk of low-temperature brittle fracture; |
1. 304 Stainless Steel: Resistant to atmospheric corrosion and mild salt spray corrosion, forms a passivation film (Cr₂O₃) on the surface, and has strong self-healing ability; 2. 316L Stainless Steel: Contains Mo, has extremely strong resistance to salt spray and acid/alkali media (chemical zones), and the passivation film is more stable; |
Coastal high-salt fog areas, chemical corrosive environments, high-voltage power lines, wind farms | It has extremely strong corrosion resistance, long service life, and low maintenance costs. |
What are the practical impacts of material selection on the lifespan and maintenance of Electrical Power 3 Hole Yoke Plates? To help users better understand this cost-effectiveness issue, let's illustrate with an example:
medium voltage lines in coastal areas
The hot-dip galvanized low-carbon steel electrical power 3 hole yoke plates, without additional anti-corrosion treatment, showed signs of galvanization peeling and rusting after 3 years. Enlarged holes caused bolts to loosen, necessitating complete replacement. After replacing them with 316L stainless steel yoke plates, they showed no significant rust after 15 years of use, only slight surface fading, requiring no maintenance. Their lifespan was extended by more than three times, and maintenance costs were reduced by 80%;
Ultra-high voltage long-span transmission lines
The yoke plate was made of 40Cr alloy structural steel with a rated load of 200kN to meet the high tension requirements. However, it was required to be inspected once a year and to touch up the paint in time if any coating damage was found. Due to the omission of the inspection, the coating damage was not dealt with in time. After 5 years, rust cracks appeared on the edge of the hole of the yoke plate, which led to a 30% decrease in load-bearing capacity. Emergency replacement was forced, resulting in line downtime and losses;
Lightweight photovoltaic power plant scenarios
The 6061 aluminum alloy yoke plate is selected, which weighs only 1/3 of the hot-dip galvanized steel of the same load, reducing the load on the photovoltaic support and increasing the installation efficiency by 50%. The power station is located in an inland dry area, and there is no obvious corrosion after 10 years of use. The mechanical properties are stable and the life meets the 25-year design requirements of photovoltaic power stations.
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