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PAYMENT METHODS
Surge Protection for Digital Pyranometers
Give your pyranometers the protection they deserve! SPD01 is a surge protection device for digital pyranometers. The SPD01 reduces the risk of costly instrument damage and data loss for connected devices, by serving as an additional layer of external protection against high-impulse currents and voltages - surges. For example, seasonal lightning and inductive switching are common sources of surges in PV power plants.
| 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: | 5:00:00 |
| Total DC output current: | 5:00:00 |
| Rated operating conditions | : |
| Required over-current protection: | ≤ 5 A slow blow fuse |
| Rated operating temperature range: | (-40 to +80) °C |
| * | tested with all Hukseflux Industrial pyranometers |
| ** | all lines tested as DC power lines |
Immunity to high voltages and currents - surges
SPD01 is a surge protection device for digital pyranometers. It is designed for use with the Hukseflux-brand “industrial pyranometer” series of instruments. The device combines and coordinates the protection of the power supply and the RS-485 serial communication lines. Protection of the pyranometer against electrical surges is very important to guarantee reliable operation in harsh “industry grade” outdoor environments such as solar (PV) power plants and meteorological stations. Hukseflux industrial pyranometers are tested and classified 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 attain 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. Adding the Surge Protection Device SPD01, the immunity is 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 Hukseflux industrial pyranometer, assures that voltages and currents reaching the sensor are strongly suppressed.
System design
Provided that instruments are in close proximity to the SPD, up to 3 instruments can be protected by a single SPD01.
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 SPD01’s may be used.
In some cases, for example on-array installation of pyranometers, it is beneficial to isolate the instruments from the mounting platform. Hukseflux supplies an optional accessory for this, the PID01 Pyranometer Isolation Disc.
Optional SMF01
SMF01 is a practical metal bracket that helps mounting a surge protection device on a vertical mast.
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Surge Protection for Digital Pyranometers
Give your pyranometers the protection they deserve! SPD01 is a surge protection device for digital pyranometers. The SPD01 reduces the risk of costly instrument damage and data loss for connected devices, by serving as an additional layer of external protection against high-impulse currents and voltages - surges. For example, seasonal lightning and inductive switching are common sources of surges in PV power plants.
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