SPD01
Surge Protection Device for digital pyranometers and diffusometers
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- surge protection
- for digital pyranometers and diffusometers
- protects up to three sensors
- level 4 surge immunity
Surge Protection Device for digital pyranometers and diffusometers
Give your solar radiation sensors the protection they deserve! 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.
- enhanced protection: increased protection of digital pyranometers, communicating over RS-485
- multi-instrument coverage: protection of up to three connected instruments by a single SPD
- level 4 surge immunity: up to 4 kV surge protection (IEC 61000-4-5 level 4)
- passive device: no power required for protective functionality
- reliable in harsh conditions: rugged, weatherproof (IP66) housing for outdoor environments
- industrial-grade: designed for Hukx-brand “industrial pyranometer and diffusometer” series
Specifications
| surge immunity* | |
| – surge immunity (EN-IEC 61000-4-5:2014) | level 4 |
| – maximum line-to-line surge** | 2 kV, 1 kA |
| – maximum line-to-ground surge** | 4 kV, 2 kA |
| – number of protected instruments | up to 3 |
| data lines | |
| – common mode signal voltage range | ± 12 V |
| – differential mode signal voltage range | ± 12 V |
All specifications
| surge immunity* | |
| – surge immunity (EN-IEC 61000-4-5:2014) | level 4 |
| – maximum line-to-line surge** | 2 kV, 1 kA |
| – maximum line-to-ground surge** | 4 kV, 2 kA |
| – number of protected instruments | up to 3 |
| data lines | |
| – common mode signal voltage range | ± 12 V |
| – differential mode signal voltage range | ± 12 V |
| – maximum line-to-earth voltage | 12 V |
| mechanical | |
| – housing material | ASA/PC UL94 V0-1.5mm |
| – cable glands | M12 (protected) |
| – cable diameter | (3 to 6) mm |
| – optional SMF01: rated pole mount diameter | (40 to 60) mm |
| – weight | 0.7 kg |
| DC power lines | |
| – rated operating DC input voltage range | ± 30 V |
| – maximum DC input current | 5 A |
| – total DC output current | 5 A |
| rated operating conditions | |
| – required over-current protection | ≤ 5 A slow blow fuse |
| – rated operating temperature range | (-40 to +80) °C |
| * tested with all Hukx industrial pyranometers | |
| ** all lines tested as DC power lines | |
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Level 4 surge immunity:
High impulse voltages and currents
SPD01 is a surge protection device for digital pyranometers and diffusometers. The device combines and coordinates the protection of the power supply and the RS-485 serial communication lines. Protecting the pyranometer against electrical surges is very important to guarantee reliable operation in harsh “industry-grade” outdoor environments, such as solar photovoltaic (PV) power plants and meteorological stations. SPD01 is designed for use with Hukx’s industrial pyranometers and diffusometers, which are tested and classified (with and without SPD01) for Industrial Environments according to IEC 61326-1 and IEC 61000-6-2.
Why add an SPD?
When designing a measurement system, pyranometer users may reach several levels of immunity. For example, the surge immunity of the SR300-D1 industrial pyranometer is level 2 (up to 1 kV surges), according to IEC 61000-4-5. With the optional Surge Protection Device SPD01, the immunity can be increased to 4 kV.
To attain the required level of immunity for a given installation, some general system components should be included, such as:
- lightning protection system
- earthing and grounding network
- external surge protection, in addition to the native on-board sensor protection
SPD01 properties
In the electrically-harsh environment of PV power plants, SPD01 protects connected instruments from lightning- and power-switching-induced surge events. At the same time, it allows for a flexible system design. Properly installing the SPD01 near a Hukx industrial pyranometer or diffusometer ensures that voltages and currents reaching the sensor are strongly suppressed.
Flexible system design
Provided that instruments are in close proximity to the SPD, up to three instruments can be protected by a single SPD01.
- The instruments are protected from surges in the grounding system.
- The distance between the instrument and SCADA system may be increased significantly.
Depending on the system design and instrument location, multiple SPD01s may be used.
In some cases, for example, with on-array installation of pyranometers, it is beneficial to isolate the instruments from the mounting platform. Hukx supplies an optional accessory for this, the PID01 Pyranometer Insulation Disk.
Suggested use
- PV system performance monitoring
- scientific meteorological observations
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