Lightning Arrester
Surge arrester is a kind of overvoltage protector, mainly used to protect various electrical equipment (transformers, switches, capacitors, wave traps, transformers, generators, electric power, power cables) in power systems, railway electrification systems, and communication systems Etc.) from atmospheric overvoltage, operating overvoltage and power frequency transient overvoltage damage, is the basis of power system insulation coordination.
□ Technical standards
The standard for product production is GB11032-2000 (eqvIE60099-4.1991) "AC gapless metal oxide arrester", JB/8952-20045 "composite metallization arrester for AC system with no gap in the jacket"
□ Product model description □ Conditions of use
YH |---- Composite jacket metal oxide arrester (HY is the old model)
| Y is metal oxide surge arrester with porcelain jacket
5 |---- Nominal discharge current Ka
W |---- Structural features W: No gap C: Series gap R: Parallel gap
S |---- place of use S: Power distribution Z: Power station R: Capacitor bank X: Line
| T: Railway D: Motor type O: Used in oil L: DC
5 |---- design serial number
-17 |---- Lightning protection rated voltage kV (effective value)
/50 |---- Maximum residual voltage kV (peak value) under nominal discharge current
□ |---- Additional Features W: Antifouling G: Plateau K: Earthquake Resistant
Power frequency: 48HZ～62HZ
Ambient temperature: -40°C～+40°C
Maximum wind speed: no more than 35m/s Altitude: no more than 2000m
Earthquake intensity: no more than 8 degrees
Icing thickness: no more than 10mm
The long-term applied voltage does not exceed its maximum continuous operating voltage. The influence of solar radiation and maximum solar radiation (1.1kW/mm2) has been considered in the product type test. If there are other heat sources near the arrester, the use of the arrester requires Both sides negotiate.
□ Product Features
1. Small in size, light in weight, resistant to collision, free from damage during transportation, flexible in installation, suitable for use in switch cabinets.
2. Special structure, molded as a whole, no gaps, good sealing, moisture-proof and explosion-proof.
3. Large creepage distance, good hydrophobicity, strong pollution resistance, stable performance, and reduced operation and maintenance.
4. Zinc oxide resistor with unique formula, small leakage current, slow aging speed and long service life.
5. The actual DC reference voltage, square wave flow capacity and high current tolerance are all higher than the national standard.
