Polymer Distribution Medium Surge Arrester – Detailed Description
Polymer Distribution Medium Surge Arresters are advanced protective devices designed to safeguard electrical distribution systems from transient overvoltages caused by lightning strikes, switching surges, and other electrical disturbances. These arresters are widely used in medium voltage networks to ensure the safety, reliability, and longevity of electrical equipment.
Constructed using high-performance metal oxide varistors (MOV) and housed in durable polymer (silicone rubber) enclosures, these arresters offer excellent non-linear voltage-current characteristics for effective surge protection. The polymer housing provides superior resistance to moisture, pollution, UV radiation, and harsh environmental conditions, making them ideal for outdoor installations.
When a surge occurs, the arrester quickly diverts the excess energy to ground, limiting the voltage to safe levels and protecting connected equipment such as transformers, cables, and switchgear. After the surge passes, the arrester returns to its normal insulating state, allowing uninterrupted system operation.
These surge arresters are lightweight, shatterproof, and easy to install compared to traditional porcelain types. Their hydrophobic surface helps maintain insulation performance even in contaminated or wet conditions, reducing maintenance requirements and improving reliability.
Key Features:
- Effective protection against lightning and switching surges
- Polymer (silicone rubber) housing for enhanced durability
- High energy absorption with low residual voltage
- مقاوم to UV, moisture, and pollution
- Lightweight, non-fragile, and easy to install
- Long service life with minimal maintenance
Applications:
- Medium voltage distribution networks
- Transformers and switchgear protection
- Overhead and underground cable systems
- Substations and industrial installations
- Renewable energy and infrastructure projects
