Surge protection for power supplies

Surge protection for power supplies

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Surge protection for any requirement – from feed-in through to the end device.

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Our surge protective devices of type 1+2, type 2 and type 3 provide effective protection for your electronic devices. Our product range features convenient, ready-to-install solutions for all of your applications.

Your advantages

  • Can be used in all standard power supply systems, thanks to powerful components
  • Superior system availability, thanks to spark gap technology without line follow current
  • Consistent protection across all protection levels, thanks to coordinated protective devices
  • Space-saving and inexpensive installation, thanks to slim design
  • Know what's happening in advance, thanks to the predictive testing of the pluggable protective devices
  • Surge protection for power supplies is part of the COMPLETE line system

The Safe Energy Control product range

Surge protection for power supply systems  

Surge protection for power supply systems

Safe Energy Control (SEC) is a product family with exceptional durability and maximum performance in the field of lightning current and surge protection. The revolutionary spark gap technology safely prevents any line follow current. This reduces the stress on the entire installation to a minimum. The surge protective devices operate in the background, preserving the entire system. Backup-fuse-free solutions are available for all applications. The consistent pluggable system rounds out the SEC family.

Type 1+2 combined lightning current and surge arresters

Type 1+2 lightning current arrester / combined lightning current and surge arrester for power supply systems  

Type 1+2 combined lightning current and surge arrester – FLT-SEC-P-T1-3S-350

Every type 1 lightning current arrester fulfills the maximum requirements with respect to its discharge capacity. At the same time, it is also a surge protective device (SPD) of type 2. The fact that a type 1 lightning current arrester satisfies test class II is a redundant piece of information and does not constitute an additional qualification. Therefore, these types of protective device are called "combined lightning current and surge arresters" (SPD type 1+2). A combined lightning current and surge arrester is a protective device that fulfills both test classes.

Type 1+2 special combined lightning current and surge arresters

Combination of type 1 lightning current arresters and type 2 surge protective devices in one product  

Type 1+2 special combined lightning current and surge arrester – FLT-SEC-T1+T2-3S-350

The type 1+2 special combined lightning current and surge arrester differs fundamentally from the type 1+2 combined lightning current and surge arrester. This is because the type 1+2 special combined lightning current and surge arrester contains two independent protective devices that are switched in parallel while occupying minimal space. The voltage-switching spark gap (SPD type 1+2) works ideally in combination with a voltage-limiting varistor (SPD type 2).  In this combination, two autonomous protective devices in one compact block ensure optimum response behavior, optimum system protection, and a long service life for the components.

Type 2 surge protective devices

Type 2 surge protective device  

Type 2 surge protective device – VAL-SEC-T2-3S-350

Type 2 surge protective devices (SPDs) are generally installed in sub-distribution stations or machine control cabinets. They form the second protection level in a three-level surge protection design. SPDs of type 2 must be able to protect against surge voltages from indirect lightning strikes or switching operations. Surge voltages caused by switching operations are often highly dynamic and occur much more frequently than surge voltages caused by lightning. Technology featuring a fast response behavior – such as varistor technology – has proven itself here.

Type 3 device protection

Type 3 surge protection for end devices  

Type 3 device protection – PLT-SEC-T3-230-FM-PT

Type 3 surge protective devices are generally installed immediately upstream of the end devices to be protected. Thus, they are also referred to as "device protection". Type 3 SPDs are available in a wide range of designs to suit the various different installation environments:

  • Devices for DIN rail mounting
  • Devices for insertion in sockets

Protection for every circumstance

Schematic view of the voltage protection level  

Voltage protection levels for different protective device types

Surge voltages are potential interference factors. Without effective protection, you can expect high costs for repairing or replacing the equipment affected.

The multi-level concept from Phoenix Contact provides effective protection for your systems and devices.

  • Type 1 protection level:
    Powerful lightning current arrester (type 1+2 combined lightning current and surge arrester or type 1+2 special combined lightning current and surge arrester)
  • Type 2 protection level:
    Surge protection that is essential for any power supply
  • Type 3 protection level:
    Surge protection for sensitive end devices

PHOENIX CONTACT (Pty) Ltd.

36 Lyn Road
P.O. Box 916
ZA-Ferndale 2160
+27/11/801-8200

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Surge protection for building installation

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Surge protection for the power supply

Learning module on surge protection for the power supply.


Surge protection reinvented

Safe Energy Control (SEC) technology offers remarkably high durability in surge protection for your application

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