Type 1 AC Surge Protection Device SPD
The LKX-A12.5/15/25/50 series are used as the first-level surge protection for power systems in areas with high lightning risk. These protectors can mitigate various surge currents, including direct lightning strikes.
Specification:
● Nominal voltage [Un]: 120V 230V 400V
● Max continuous operating voltage [Uc]： 150V 275V 320V 385V 440V
● Type 1 / Class l/Class B
● lmpulse discharge current (10/350 us) [limp] = 12.5/15/25/50kA @ Type 1
● Maximum discharge current (10/350 us) [Imax] = 100/200kA @ Type 1
● Protective elements: Metal Oxide Varistor (MOV), Gas Discharge Tube(GDT)
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Type 1+2 AC Surge Protection Device SPD
LKX-B+C series AC multi-pole surge protection device (SPD)
T1+T2 AC SPD meets both Class I (10/350 μs waveform) and Class II (8/20 μs waveform) tests
Specification:
● Nominal voltage [Un]: 220V 300V 380V 400V
● Max,continuous operating voltage [Uc]: 275V 320V 385V 440V
● Type 1+2 / Class l+ll / Class B+C
● Lightning impulse current(10/350us) [limp] = 12.5kA @ Type 1
● Nominal discharge current (8/20 us) [In] = 20kA @ Type 2
● Maximum discharge current (8/20 us) [Imax] = 50kA @ Type 2
● Protective elements: Metal Oxide Varistor (MOV), Gas Discharge Tube(GDT)
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Type 2 AC Surge Protection Device SPD
DlN-rail type AC SPD for multi-pole surge protection device (SPD) - LKX-C40 series
LKX-C series type2 AC SPD meets Class II (8/20 μs waveform) tests and offers an optional remote signaling feature that triggers a remote alarm.
Specification:
● Nominal voltage [Un]: 220V 300V 380V 400V
● Max,continuous operating voltage [Uc]: 275V 320V 385V 440V
● Type 2 / Class l/Class B
● Nominal discharge current (8/20 us) [In] = 20kA @ Type 2
● Maximum discharge current (8/20 us) [Imax] = 40kA @ Type 2
● Protective elements: Metal Oxide Varistor (MOV), Gas Discharge Tube(GDT)
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Can SPDs protect against all types of electrical disturbances?
SPDs are designed to protect against most transient surges, but they have limits based on their rating. They may not fully protect against extremely high-energy surges or direct lightning strikes if the device is not appropriately rated. For comprehensive protection, a combination of different SPD types may be used.
The Difference between Type 1, Type 2Protection Device SPD
Type 1 SPD is designed to handle high-energy transient voltage surges, often caused by direct lightning strikes. These devices are typically installed at the main power supply entrance of a building, providing primary protection against such extreme conditions. Type 1 SPDs are capable of managing surge currents up to 100 kA or more, utilizing high-energy protection components like air-gap arresters to ensure the system is protected during severe surges.
Type 2 SPD offers protection for the distribution parts of the electrical system, addressing residual surges that may still be present after Type 1 protection. Installed at distribution panels or sub-panels, Type 2 SPDs are designed to manage lower surge currents, usually up to 20-40 kA per phase. These devices incorporate components such as Metal Oxide Varistors (MOVs) or Gas Discharge Tubes (GDTs) to provide adequate protection for equipment following the primary surge protection.
T1+T2 SPD combines the benefits of Type 1 and Type 2 SPDs, providing comprehensive protection for the entire electrical system. By installing a Type 1 SPD at the main power entrance to address high-energy surges and a Type 2 SPD within the distribution system for secondary protection, T1+T2 SPDs ensure robust defense against a broad range of surges. This combined approach is ideal for high-risk environments such as data centers, hospitals, and industrial facilities, where comprehensive surge protection is crucial.
When multiple surge protection devices (SPDs) are needed to safeguard an installation, it's important that they are coordinated to work properly together. If the SPDs come from different manufacturers, it's crucial to check that they are compatible with each other. The installer and the manufacturers of the devices are the best sources of advice to ensure that the SPDs will function correctly in conjunction.
What is Surge Protective Device（SPDs）？
A Surge Protection Device (SPD), also known as a surge protector, is designed to shield electronic devices from power surges and transient overvoltages. It acts as a critical component in an electrical installation protection system. An SPD is connected in parallel with the power supply circuit of the loads it protects, which means it can be utilized at various levels of the power supply network. When connected in parallel, the SPD exhibits high impedance under normal conditions. However, when a transient overvoltage occurs, the impedance of the SPD decreases, allowing surge current to be diverted through the device and away from sensitive equipment. This process helps prevent damage to valuable electronics by ensuring that the excess surge energy is safely managed.