Surge Protective Device (SPD)


 Surge Protective Devices (SPD) are devices that prevent the damaging effects of high-voltage surges that occur in power transmission lines due to causes such as high-voltage line faults, lightning strikes, and circuit breaker openings. These devices, or simply protection elements that discharge excessive voltage in energy transmission lines to the ground, are known as Surge Protective Devices (SPD). Depending on the usage location, there are four types of Surge Protective Devices (SPD): Type 1 (B), Type 2 (C), Type 3 (D), and Type 1+2 (B+C). Lightning rod systems only protect installations from the physical effects of lightning. This does not mean that electrical devices are fully protected. For electrical protection, it is essential to use a Surge Protective Device (SPD) (internal lightning protection) in the installations. The Surge Protective Device (SPD) used in the main panels (Type B) cannot guarantee protection for subpanels. The majority of surge voltages are caused by internal surges, and for these types of voltages, Type C Surge Protective Devices (SPD) should be used in subpanels. The Surge Protective Devices (SPD) suitable for use in the main panel have an Iimp current rating, while those for subpanels and sensitive device panels should have an Imax current rating. Surge Protective Device (SPD) selection should be made based on these current ratings as needed.


Product Description Main Product Group Product Type Iimp Imax In Number of Poles Operating Voltage (V) Utilization Current Catalog Code
Surge Protective Device (SPD) FSPD-D20 1PN Imax:20kA 440Vac Surge Protective Device (SPD) FSPD 20 kA 10 kA 1PN 440V AC 9UA-K4402-0010 Detail
Surge Protective Device (SPD) FSPD-C40 1PN Imax:40kA 440Vac Surge Protective Device (SPD) FSPD 40 Ka 20 kA 1PN 440V AC 9UA-K4402-0020 Detail
Surge Protective Device (SPD) FSPD-C40 3PN Imax:40kA 440Vac Surge Protective Device (SPD) FSPD 40 kA 20 kA 3PN 440V AC 9UA-K4404-0020 Detail
Surge Protective Device (SPD) FSPD-B50 3PN Iimp:50kA 275Vac Surge Protective Device (SPD) FSPD 50 kA 100 kA 3PN 275V AC 9UA-S2754-0100 Detail
Surge Protective Device (SPD) FSPD-BC25 3PN Iimp:25kA 300Vac Surge Protective Device (SPD) FSPD 25 kA 25 kA 3PN 300V AC 9UA-SB004-0025 Detail
Surge Protective Device (SPD) FSPD-BC5 3PN11 Imax:50kA 385Vac Surge Protective Device (SPD) FSPD 5 kA 50 kA 20 kA 3PN 385V AC 9UA-SB004-0020 Detail
Surge Protective Device (SPD) FSPD-BC12 3PN11 Imax:50kA 275Vac Surge Protective Device (SPD) FSPD 12,5 kA 50 kA 20 kA 3PN 275V AC 9UA-SB004-0021 Detail
Surge Protective Device (SPD) FSPD-BC13 3PN11 Imax:100kA 275Vac Surge Protective Device (SPD) FSPD 12,5/25 kA 100 kA 50 kA 3PN 275V AC 9UA-K4404-0021 Detail
Surge Protective Device (SPD) FSPD-BC15 3PN11 Imax:100kA 385Vac Surge Protective Device (SPD) FSPD 15/25 kA 100 kA 40 kA 3PN 385V AC 9UA-SB004-0040 Detail
Surge Protective Device (SPD) FSPD-BC5DC 3P11 Imax:50kA 1000Vdc Surge Protective Device (SPD) FSPD 5 kA 50 kA 20 kA 3P 1000V DC 9UA-SB003-DC20 Detail
Surge Protective Device (SPD) FSPD-C40DC 1PN Imax:40kA 1000Vdc Surge Protective Device (SPD) FSPD 40 kA 20 kA 1PN 1000V DC 9UA-K4402-DC20 Detail
Surge Protective Device (SPD) FSPD-C40DC 3P Imax:40kA 1000Vdc Surge Protective Device (SPD) FSPD 40 kA 20 kA 3P 1000V DC 9UA-K4403-DC20 Detail