Type 2 surge protection unit SPD01

outdoorfor transient current protectionRS-485

Overview
SPD01 is an industrial-grade surge protection device for digital pyranometers and diffusometers. It reduces the risk of costly instrument damage and data loss by protecting up to three connected devices against high-impulse currents and voltages: surges. For example, seasonal lightning and inductive switching are common sources of surges in PV power plants.

Key features
• Level 4 surge immunity: Upgrades system surge protection to Level 4 (up to 4 kV / 2 kA line-to-ground and 2 kV / 1 kA line-to-line) according to EN-IEC 61000-4-5:2014.
• Multi-instrument coverage: Protects up to three connected digital instruments simultaneously with a single SPD01 unit.
• Coordinated line protection: Combines and coordinates surge suppression across both DC power lines and RS-485 serial data lines.
• Passive operation: Operates without requiring external operating power for its protective functionality.
• Rugged outdoor enclosure: Built with an IP66 weatherproof, flame-retardant ASA/PC housing (UL94 V0-1.5mm) rated for operating temperatures from -40 to +80 °C.
• Industrial standard compliance: Tested and classified for Industrial Environments according to IEC 61326-1 and IEC 61000-6-2 when paired with Hukx industrial sensors.
• Flexible system integration: Significantly increases allowable cable distances between on-site sensors and SCADA systems while shielding instruments from ground network surges.

Applications
• Surge and lightning protection for utility-scale and commercial PV power plants.
• Meteorological stations and environmental monitoring networks prone to lightning strikes.
• Protection of digital pyranometers and diffusometers connected to SCADA or data-logging networks.
• On-array PV installations subject to high-impulse voltages and inductive switching transients.

Specifications
• Protected lines: DC power lines and RS-485 serial data lines
• Number of protected instruments: Up to 3
• Surge immunity classification: EN-IEC 61000-4-5:2014 Level 4
• Maximum line-to-ground surge: 4 kV, 2 kA
• Maximum line-to-line surge: 2 kV, 1 kA
• Rated operating DC input voltage range: ± 30 V
• Maximum DC input current: 5 A
• Total DC output current: 5 A
• Common mode signal voltage range: ± 12 V
• Differential mode signal voltage range: ± 12 V
• Maximum line-to-earth voltage: 12 V
• Required over-current protection: ≤ 5 A slow blow fuse
• Rated operating temperature range: -40 to +80 °C
• Housing material: ASA/PC UL94 V0-1.5mm (weatherproof IP66)
• Cable glands: M12 (protected)
• Clamping cable diameter: 3 to 6 mm
• Weight: 0.7 kg

Options and accessories
• SMF01: SPD mounting fixture (metal tube mounting bracket with 2 x 40–60 mm tube clamps for vertical mast installation)
• PID01: Pyranometer Insulation Disk (electrically insulates instruments from conductive mounting platforms)