10-35KV high-voltage zinc oxide lightning arrester composite jacket with no gap

1、 Product Overview

YH5WZ-51/134 is a gapless metal oxide lightning arrester designed for 35kV power systems, with high-performance zinc oxide resistors as the core components. The product complies with the GB11032-2020 standard and has excellent nonlinear volt ampere characteristics and fast response capability, which can effectively limit lightning overvoltage and operational overvoltage, and protect key power facilities such as transformers and switchgear from damage.

2、 Core Features

1. High performance protection

• Rated voltage 51kV, continuous operating voltage 40.8kV, nominal discharge current 5kA

• Residual voltage ratio ≤ 2.4 (8/20 μ s waveform), response time ＜ 25ns

2. stable and reliable

• Silicone rubber jacket is molded as a whole, with a protection level of IP66, UV resistance, and pollution resistance

• Sealed structure design, internally filled with nitrogen to prevent moisture, maintenance free lifespan ≥ 20 years

3. intelligent monitoring（optional）

• Equipped with leakage current online monitoring terminals, supporting remote data transmission

3、 Technical parameters

Project parameter system nominal voltage 35kV DC reference voltage ≥ 73kV (1mA) square wave current capacity 400A (2ms) creepage distance 1340mm

4、 Application scenarios

35kV substation incoming and outgoing line protection
■ Lightning protection for wind power plant collection lines
Overvoltage protection of railway traction power supply system

5、 Quality control

• Passed 100% power frequency withstand voltage test (51kV/10s)

• Each resistor undergoes an 8/20 μ s high current impulse test

(Note: The product provides third-party testing reports and supports customized configuration)

10-35KV high-voltage zinc oxide lightning arrester composite jacket with no gapYH5WZ-51/134

1. In depth analysis of the product

1.1 Structural Design

• core component：
  99.9% high-purity zinc oxide resistors are used, and each resistor is sintered at 850 ℃ to form a uniform grain boundary layer with a nonlinear coefficient of α ≤ 0.035

• Insulation system：
  Double layer sealing structure (inner epoxy resin vacuum casting+outer high-temperature vulcanized silicone rubber), passed the cold and hot cycle test of -40 ℃~+85 ℃

• mechanical strength：
  The installation holes of the flange comply with the IEC 60099-4 standard and can withstand a horizontal tensile force of ≥ 500N

1.2 Electrical Performance

The testing project standard requires actual measurement data with a power frequency withstand voltage of 51kV/10s, no flashover/breakdown of 4/10 μ s, high current impact of 100kA, residual voltage ≤ 134kV, and accelerated aging test 1000h@115 %UrΔU1mA＜3%

1.3 Intelligent monitoring scheme

• Built in wireless temperature measurement module (optional):
  Real time monitoring of internal temperature of lightning arrester, alarm threshold can be set (default 65 ℃)

• Leakage current monitoring accuracy:
  0.1mA resolution, supports LoRa wireless transmission to SCADA system

2. Engineering Application Guidelines

2.1 Installation specifications

• Minimum installation spacing:
  Interphase distance ≥ 1.2m, ground distance ≥ 2.5m

• Grounding requirements:
  The resistance of the independent grounding grid is ≤ 5 Ω, and the cross-sectional area of the down conductor is ≥ 50mm ²

  
  

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2.2 Selection Comparison Table

Recommended model for system conditions: YH5WZ-51/134CQ in coastal high salt spray areas, high altitude (3000m+) YH5WZ-51/134G

3. Quality Assurance System

• production process
  Fully automatic constant temperature and humidity assembly workshop (humidity ≤ 30% RH)

• Testing equipment:
  Equipped with an 8m ³ impulse voltage generator (± 1% waveform accuracy)

• Certification qualifications:
  Having KEMA, CQC, and CNAS laboratory certification reports

4. Typical fault handling

• abnormal heating：
  Check if the continuous operating voltage exceeds the limit, and if necessary, increase the capacity

• Counter misoperation：
  Check if there are high-frequency interference sources in the surrounding area

10-35KV high-voltage zinc oxide lightning arrester composite jacket with no gapYH5WZ-51/134