DC Surge Protection Device
This surge protection device (SPD) is designed for DC photovoltaic systems. It protects against overvoltage and transient surges with a maximum discharge current of 40kA.
Technical Specifications
Overview
High-Performance PV DC Surge Protection
The KYUD-40 is a specialized DC Surge Protection Device (SPD) designed specifically for photovoltaic systems, complying with the EN 50539-11 standard. It provides robust protection for PV DC combiner boxes, inverters, and controllers against lightning strikes and transient overvoltages. Featuring a modular plug-in design and high-energy varistors, it ensures rapid response times and simplified maintenance for critical solar infrastructure.
Key Performance Metrics
Technical Highlights
1,000 V
Max DC Voltage (Uc)
40 kA
Max Discharge Current
20 kA
Nominal Discharge Current
25 ns
Response Time
Electrical Specifications
- Voltage Protection Level (Up)
- 3.8 kV
- IEC/EN Category
- IEC II / EN2
- Available Poles
- 2P3P4P
Installation & Connectivity
Wiring Capacity
| Cable Type | Range (mm²) |
|---|---|
| Hard Cable | 4~25 |
| Flexible Cable | 4~16 |
Tightening Torque
- Main Circuit: 2.5 Nm
- Remote Contact: 0.25 Nm
- Terminal Screw: M5
- Mounting
- Din Rail TH35-7.5/DIN35
Environmental & Safety
Ingress Protection
IP20
- Operating Temperature
- -40℃ to +80℃
- Relative Humidity
- 30%~90%
Features
Operational Features
- Plug-in protection modules for easy maintenance
- Visual status indication (Green: OK / Red: Fault)
- Optional remote signaling contact (FM)
- High energy varistor technology
- Prewired modular complete unit
- Remote Contact Rating
- Max 30V DC / 1A
