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Kripal DC Surge Protective Device SPC5-20
In Stock
In Stock
Description
Kripal manufactures a range of DC Surge Protective Devices (SPDs) designed to protect electrical equipment in DC systems, such as solar photovoltaic (PV) installations. These devices prevent damage from voltage surges caused by lightning strikes or switching operations.
How Kripal DC SPDs work
A Kripal DC SPD continuously monitors the voltage in a DC circuit.
- When a surge is detected, a component called a Metal Oxide Varistor (MOV) rapidly lowers its resistance.
- This allows the excess voltage to be diverted safely to the ground, protecting the connected equipment from harm.
- Under normal conditions, the MOV has high resistance and remains isolated from the circuit.
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Kripal DC SPD seriesKripal offers different series of DC SPDs categorized by protection class, as detailed on the Kripal website:
- SPI series (Class B): These are high-energy surge arresters designed to protect against strong surges, such as those caused by lightning strikes.
- SPC series (Class C): This series offers surge protectors for lower-energy surges and is typically installed at sub-distribution boards.
Features and how they work
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- Protection mechanism: Kripal DC SPDs use MOVs, which have high resistance under normal voltage. When a surge occurs, the MOV's resistance drops rapidly, creating a low-impedance path that diverts excess current to the ground.
- Performance indication: Many models feature a visual indicator that changes color—typically from green to red—when the device has failed. Some advanced models also include remote signaling for external monitoring.
- Modular design: The Kripal surge protective module is often replaceable, allowing for maintenance without rewiring the entire device.
- Easy installation: These SPDs are designed for standard 35mm DIN rail mounting, making them easy to install and integrate into electrical panels.
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