The Asiapower AP-YH Series 33kV Polymer Surge Arrester is the frontline defense for electrical infrastructure. It provides essential insulation coordination for transformers, capacitors, and switchgear by limiting overvoltages from lightning strikes and operational switching. Utilizing a gapless design and premium Zinc Oxide (ZnO) varistors, it offers lightning-fast response times and high energy dissipation capacity.
Parameters:
| Parameter | AP-YH5W-33 (5kA Class) | AP-YH10W-33 (10kA Class) |
| Nominal System Voltage | 33 kV | 33 kV |
| Arrester Rated Voltage (Ur) | 42 kV | 42 kV |
| Continuous Operating Voltage (Uc) | 34 kV | 34 kV |
| Nominal Discharge Current (8/20μs) | 5 kA | 10 kA |
| Steep Current Impulse Residual Voltage (max.) | 125kV | 112kV |
| Lightning Impulse Residual Voltage (max.) | 110kV | 99kV |
| Switching Impulse Residual Voltage (max.) | 94kV | 86.7kV |
| Creepage Distance | ≥ 900 mm (Customizable) | ≥ 900 mm (Customizable) |
Core Advantages
Superior Non-linear Characteristics: The core ZnO elements provide a sharp volt-ampere curve, ensuring minimal power loss at operating voltage and instant suppression during surges.
Hydrophobic Silicone Housing: The polymer casing offers excellent anti-tracking and anti-erosion properties, outperforming traditional porcelain in high-pollution and coastal areas.
Explosion-Proof Design: The lightweight, flexible polymer structure eliminates the risk of porcelain shattering, enhancing the safety of nearby equipment and personnel.
High Flow Capacity: Optimized for steep-wave response and large current discharge, ensuring long-term stability under repetitive surge conditions.
Technical Features & Benefits
Superior Non-linear Characteristics: The core ZnO elements provide a sharp volt-ampere curve, ensuring minimal power loss at operating voltage and instant suppression during surges.
Hydrophobic Silicone Housing: The polymer casing offers excellent anti-tracking and anti-erosion properties, outperforming traditional porcelain in high-pollution and coastal areas.
Explosion-Proof Design: The lightweight, flexible polymer structure eliminates the risk of porcelain shattering, enhancing the safety of nearby equipment and personnel.
High Flow Capacity: Optimized for steep-wave response and large current discharge, ensuring long-term stability under repetitive surge conditions.
Service Conditions (Environmental Limits)
Ambient Temperature: -40°C to +45°C
Altitude: Standard up to 1000m (High-altitude customization available)
Power Frequency: 48Hz – 62Hz
Maximum Wind Velocity: 35 m/s
Seismic Intensity: Up to 7 degrees
Pollution Level: Suitable for Class III & IV heavy pollution areas (Custom creepage distance available).
Choosing Between 5kA and 10kA
While both classes provide protection, the optimal choice depends on the system’s fault current level and protection requirements:
5kA Class (AP-YH5W): Typically used for lower-fault-level lines and less critical equipment.
10kA Class (AP-YH10W): Ideal for high-fault-level environments, distribution transformers, and areas with higher overvoltage risk.
We are producing all components including zno blocks, disconnectors, and bracket by ourself, welcome all factories for cooperation.
