HY10CX-108/281 series-connected suspension zinc oxide arrester, 110kV line-type high-voltage arrester

Product Description of HY10CX-108/281 110kV Line-Type Suspended Composite Sleeve Zinc Oxide Arrester with External Series Gap

This description aims to elaborate in detail on the product characteristics, technical parameters, working principles and applications of the HY10CX-108/281 arrester, which is a 110kV AC transmission line suspended composite sleeve zinc oxide arrester with external series gaps.

I. Product Overview and Model Meaning

HY10CX-108/281 is a line-type (suspended) organic composite sleeve metal oxide arrester, whose core adopts zinc oxide resistance chips with nonlinear volt-ampere characteristics.

The model is compiled in accordance with JB/T 8459 standard, and its specific meanings are as follows:

H: Composite sleeve (organic material)

Y: Metal oxide arrester

10: Nominal discharge current (10kA)

C: Series gap structure

X: Line type (application occasion)

108: Rated voltage of the arrester (108kV, RMS value)

281: Residual voltage under lightning impulse current (≤281kV, peak value)

The "HY" and "YH" in the model are interchangeable, both referring to composite sleeve zinc oxide arresters, with no substantial difference.

II. Working Principle and Core Advantages

This arrester is connected in parallel across the two ends of the line insulator (string), and is mainly used to limit lightning overvoltage of transmission lines, improve the lightning withstand level of lines and reduce lightning trip-out rate.

Working principle: Under the normal system operating voltage, the series gap isolates the zinc oxide resistance chips from the wires, and the resistance chips only bear extremely small leakage current (microampere level). When the lightning overvoltage reaches the discharge voltage of the gap, the gap breaks down, and the nonlinear zinc oxide resistance chips conduct rapidly, release overvoltage energy, limit the residual voltage below the safe level of the equipment, and then quickly restore to the high-resistance state.

Technical advantages:

Protection performance: The zinc oxide resistance chips have fast response speed, no delay to steep-front voltage, low operating residual voltage, and their protection characteristics are comprehensively better than traditional silicon carbide arresters, which can effectively absorb lightning, switching and power frequency temporary overvoltages.

Reliable structure: It is formed by overall silicone rubber compression molding, with good sealing performance, anti-explosion performance, small volume and light weight, which is convenient for installation and maintenance.

Strong contamination resistance: The composite sleeve has good hydrophobicity and resistance to electric corrosion, suitable for contaminated areas, reducing the need for cleaning and maintenance.

Flexible installation: It is mainly designed to be suspended (installed on towers), and can also be installed with seat piles.

III. Main Technical Parameters and Execution Standards

System nominal voltage: 110kV.

Rated voltage of the arrester: 108kV (RMS value).

Lightning impulse residual voltage (8/20μs): ≤281kV (peak value).

Nominal discharge current: 10kA.

DC reference voltage (U1mA): Generally not less than about 148kV (calculated by referring to the parameters of similar product HY10CX-96/260).

Series gap distance: Determined according to the design, used to isolate the normal operating voltage.

Square wave current passing capacity: Generally refers to the withstand capability within a certain time (such as 2ms), the specific value shall refer to the manufacturer's technical documents (referring to similar products, it may be 400A or higher).

IV. Typical Application Scenarios

This product is applicable to the following 110kV transmission line scenarios:

Areas with frequent lightning activities and high lightning trip-out rate.

Towers with high grounding resistance in mountainous areas, hills and other places.

Towers in large span spans (such as crossing rivers).

Line sections that need to limit switching overvoltage before entering the substation.

Severely contaminated areas, which can reduce faults caused by pollution flashover.

V. Service Environment Conditions

The conventional service environment conditions are as follows (please refer to the product manual for details):

Ambient temperature: -40℃ to +40℃.

Altitude: Generally not exceeding 1000m (correction shall be considered for 2000m and below).

Maximum wind speed: ≤35m/s.

Seismic intensity: Areas with intensity 7 and below.

Power frequency: 50Hz or 60Hz.

The long-term applied power frequency voltage shall not exceed the continuous operating voltage of the arrester.

VI. Matters Needing Attention

This product is a line-type arrester with series gaps, and its protection characteristics and application occasions and installation requirements are different from those of pure gapless arresters (such as Y10W-108/281), which shall be clarified during selection.

Installation and maintenance shall be strictly carried out in accordance with the installation manual provided by the manufacturer and the power industry safety regulations.

The arrester may have a safety warning function after being completely damaged (such as no current output), and shall be replaced in time.