Installation Devices – Surge Protective Devices

Index

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–Ex9UE1+2, 25 kA – Ex9UE1 +2, 12.5 kA – Ex9UE2 –Ex9UE3

Ex9UE1+2 Surge Protective Devices, 25 kA

• Surge Protective Devices
• Type 1+2 (Class I+II, T1+T2, B+C)
• Tested according to EN 61643-11
• Maximum impulse current Iimp 25 kA (10/350 μs) per module and 100 kA for NPE module
• Maximum continuous operating voltage Uc 280 V AC
• 3+0, 3+1, and 4+0 connection versions
• Plug-in module design
• With and without remote signaling contact
• Device status indicator

The Ex9UE1+2 25 line is a group of Class I+II Surge Protective Devices (SPD). They are intended for protection against the direct impacts of medium-intensity lightning strikes. In a standard TN-C three-phase network, they provide protection up to LPL I and II requirements as defined in the EN 62305 standard, with a total lightning current introduced into the electrical system of 75 kA and a total lightning discharge current of 150 or 200 kA, depending on the physical configuration and the relative position between the lightning rod grounding point, the electrical system grounding point, and the SPD installation point.

The design of the Ex9UE1+2 25 is a hybrid type, based on the combination of high-energy Metal Oxide Varistors (MOV) and an isolation Spark Gap (SG). This combination offers a faster response time due to the speed of the MOV and the low voltage of the SG, compared to a solution using only an SG. The series connection of the MOV allows for the limitation of the SG’s follow current while ensuring complete isolation thanks to the series connection between the SG and MOV.

The main characteristics are primarily determined by the MOV component. The resulting protection level and response characteristics meet the requirements of both Class I and Class II SPDs. Therefore, the Ex9UE1+2 25 provides protection for both classes. The modular design with plug-in inserts allows for simple and rapid replacement of functional modules in the event that the MOV exceeds its service life due to high-intensity or high-frequency surge events.

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Ex9UE1+2 Surge Protective Devices, 12.5 kA

• Surge Protective Devices
• Type 1+2 (Class I+II, T1+T2, B+C)
• Tested according to EN 61643-11
• Maximum impulse current Iimp 12.5 kA (10/350 μs) per module and 50 kA for NPE module
• Maximum continuous operating voltage Uc 275 V
• 1+0, 1+1, 2+0, 3+0, 3+1, and 4+0 connection versions
• Plug-in module design
• With and without remote signaling contact
• Device status indicator

The Ex9UE1+2 12.5 line is a group of Class I+II Surge Protective Devices (SPD). They are designed to provide protection against indirect impacts and low-intensity direct lightning discharges. In a standard TN-C three-phase network, they provide protection compliant with LPL III and IV requirements established by the EN 62305 standard, with a total lightning current introduced into the electrical system of 37.5 kA and a total lightning discharge current of 75 or 100 kA, depending on the physical configuration and the relative position between the lightning rod grounding point, the electrical system grounding point, and the SPD installation point.

The design of the Ex9UE1+2 12.5 is based on high-energy Metal Oxide Varistors (MOV). This configuration guarantees a short response time and ensures characteristics compliant with both Class I and Class II. The modular design with plug-in inserts allows for simple and rapid replacement of functional modules in the event that the MOV exceeds its service life due to high-intensity or high-frequency surge events.

Certifications

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Ex9UE2 Surge Protective Devices

• Surge Protective Devices
• Type 2 (Class II, T2, C)
• Tested according to EN 61643-11
• Nominal discharge current In 20 kA (8/20 μs) per module and 40 kA for NPE module
• Maximum continuous operating voltage Uc from 275 V up to 440 V AC
• 1+0, 1+1, 2+0, 3+0, 3+1, and 4+0 connection versions
• Plug-in module design
• With and without remote signaling contact
• Device status indicator

The Ex9UE2 line is a group of Class II Surge Protective Devices (SPD). They are designed to provide protection against indirect lightning strikes and switching transients. In a standard installation, they are typically installed in sub-distribution boards or as a second stage of protection following Type 1 devices in the main panel.

The design of the Ex9UE2 is based on high-energy Metal Oxide Varistors (MOV). This configuration ensures a fast response time and reliable protection for connected electrical equipment. The modular design with plug-in inserts allows for simple and rapid replacement of functional modules if the MOV reaches the end of its service life due to repeated or high-intensity surge events.

Certifications

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Ex9UE3 Surge Protective Devices

• Surge Protective Devices
• Type 3 (Class III, T3, D)
• Tested according to EN 61643-11
• Maximum continuous operating voltage Uc 275 V AC
• Design based on Y-connection of functional elements
• Plug-in module design
• With and without remote signaling contact
• Device status indicator on the front side

The Ex9UE3 line consists of Class III Surge Protective Devices (SPD). They are designed to provide fine protection for sensitive electronic equipment against residual transient overvoltages. These devices are intended to be installed as close as possible to the terminal equipment, typically in sub-distribution boards or directly before the load, following the primary and secondary protection stages (Type 1 and Type 2).

The design of the Ex9UE3 features a Y-connection, which provides protection in both common and differential modes. This configuration, based on high-performance Metal Oxide Varistors (MOV) and/or thermal protection, ensures a very low voltage protection level (Up), effectively shielding delicate electronics. The modular design with plug-in inserts allows for quick and easy replacement of the protection module once it reaches the end of its service life due to surge suppression activities.

Certifications

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