HY10CX-108/281 ar sērijas savienotu sviestu cinka oksīda aizsarguzlāde, 110kV līnijas tipa augspiediena aizsarguzlāde

HY10CX-108/281 110kV line-type composite silicone housing zinc oxide arrester with external series gap product description

This description aims to elaborate in detail on the product features, technical parameters, working principles and applications of the HY10CX-108/281 arrester, which is a suspension type composite silicone housing zinc oxide arrester with external series gap for 110kV AC transmission lines.

1. Product overview and model meaning

HY10CX-108/281 is a line-type (suspended) organic composite silicone housing 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 silicone housing (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)

"HY" and "YH" in the model are interchangeable, both refer to composite silicone housing zinc oxide arresters, with no substantial difference.

2. Working principle and core advantages

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

Working principle: Under the normal operating voltage of the system, 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 quickly conduct, 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: Adopting integral silicone rubber compression molding, with good sealing performance, explosion-proof performance, small volume and light weight, which is convenient for installation and maintenance.

Strong pollution resistance: The composite silicone housing has good hydrophobicity and erosion resistance, suitable for polluted areas, reducing the need for cleaning and maintenance.

Flexible installation: Mainly designed as suspended type (installed on towers), and can also be installed with base pile type.

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

4. Typical application scenarios

This product is suitable for 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 of large span spans (such as crossing rivers).

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

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

5. Operating environment conditions

Conventional operating 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.

6. Precautions

This product is a line-type arrester with series gap, 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 carried out strictly in accordance with the installation manual provided by the manufacturer and the power industry safety regulations.

After the arrester is completely damaged, it may have a safety warning function (such as no current output), and it shall be replaced in time.