HY5WS-17/50C Line Surge Arrester for 17kV Systems

The HY5WS-17/50C is a polymer-housed line-type surge arrester rated for 17kV systems, designed to protect distribution feeders, transformers, and line terminals from lightning and switching overvoltages. It uses a gapless ZnO varistor core with high thermal stability and pollution resistance, ensuring safe and stable performance even in coastal or industrial environments.

🔧 Product Overview

With a lightweight silicone rubber housing and stainless steel fittings, this arrester is ideal for pole-mounted applications where ease of installation and mechanical resilience are crucial. The unit is sealed against moisture ingress and operates without requiring regular maintenance.

Key Features:

Rated voltage: 17kV; Class 50kA
Gapless zinc oxide varistor core
Suitable for overhead lines and distribution transformers
UV-resistant polymer housing with hydrophobic surface
Optional disconnector for safe failure indication
Complies with IEC 60099-4 standards

📐 Technical Specifications

Parameter	Value
Rated Voltage (Ur)	17 kV
Continuous Operating Voltage (Uc)	13.6 kV
Rated Discharge Current	10 kA (8/20 μs)
High Current Impulse	100 kA
Residual Voltage at 10kA	≤ 45 kV
Housing Type	Polymer (Silicone Rubber)
Mounting	Line-hanging / cross-arm
Creepage Distance	≥ 510 mm
Altitude	≤ 3000 m
Pollution Class	IV (Heavy)

🌍 Typical Applications

15kV / 17kV overhead distribution lines
Transformer bushing protection
Renewable energy feeders (wind/solar lines)
Substation feeder exit protection
Line terminals in lightning-prone areas

📊 Case Study: Wind Farm Lightning Mitigation – Vietnam (2023)

In 2023, the HY5WS-17/50C was deployed across multiple 33kV to 15kV step-down poles in a wind farm in Quảng Trị, Vietnam.
Project Outcomes:

Prevented 5+ surge-related outages during monsoon season
Enabled safe disconnection via bottom-mounted fault indicator
Maintained performance despite heavy salt spray and humidity

Source: Vietnam Renewable Grid Stability Report, 2023

🛠 Installation Tips

Mount vertically with secure brackets or cross-arm clamps
Maintain clearance to grounded structures per IEC 60071
Connect the bottom terminal to the ground rod (< 5Ω resistance)
Use the included spark gap or disconnector for added safety
Avoid low points prone to standing water or flashover

❓ Frequently Asked Questions (FAQ)

1. What is the function of a line-type surge arrester?
It protects exposed conductors and terminals on overhead lines from high-voltage surges caused by lightning or switching.

2. Can this arrester be used on renewable energy feeders?
Yes. It's suitable for wind farms, solar PV, and small hydro feeders rated up to 17kV.

3. Does it need a disconnector?
We recommend adding a bottom-mounted disconnector to safely isolate failed arresters and provide visual indication.

4. What is the expected service life?
Typical lifespan is 10–15 years under standard environmental conditions.

5. Is the housing UV resistant?
Yes, the silicone rubber housing is UV- and weather-resistant, ideal for tropical or high-sunlight zones.