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Mors Smitt BV
SPD - Surge Protection Devices

SPD - Surge Protection Devices

Product catalog summary

Introduction
Mors Smitt, part of Wabtec Corporation, specializes in manufacturing surge protection devices (SPDs) for industrial applications. These devices protect electronic systems from electromagnetic disturbances and overvoltage, adhering to IEC 62305 regulations.

Product Specifications
The document outlines various types of surge and lightning arresters:

Type 1 Lightning Arresters: Installed at lightning protection zones 0 and 1 boundaries, available with spark gap, varistor, or gas discharge tube.
Type 1+2 Lightning and Surge Arresters: Used for equipotential bonding and eliminating switching surges, suitable for LPL I and II applications.
Type 2 Surge Arresters: Recommended for boundaries of lightning protection zones 1 and 2, suitable for industrial, residential, and administrative buildings.

Selection Guide
The guide assists in choosing the appropriate SPD based on circuit and application requirements, including:

Steps for selecting SPD Type 1, 2, and 3.
Coordination requirements for different SPD types.
Considerations for buildings with varying levels of protection (LPL I and II).

Applications and Installation
SPDs are applicable in settings like hospitals, banks, and industrial buildings. Installation guidelines emphasize proper coordination and placement within switchboards and control panels.

Technical Specifications
Detailed technical specifications include:

Electrical strength and insulation resistance.
Maximum switching current and voltage.
Symbols and classifications according to IEC and EN standards.

Environmental and Quality Standards
Mors Smitt adheres to ISO 9001:2008 and ISO 14001 standards, emphasizing reliability, safety, and environmental consciousness.

Conclusion
Mors Smitt's SPDs meet high standards of electromagnetic compatibility, ensuring protection and reliability of electronic systems in various industrial applications.

Specifications and Recommendations
The document discusses the selection and installation of SPDs in a multi-stage overvoltage protection cascade. It recommends choosing a surge arrester with a fault current parameter (Ifi) approximately twice the estimated value of 3kArms. Surge separating inductors with an impedance of 2-15μH are advised for energetic coordination between stages, especially when the distance between stages is less than 10 meters.

Procedures
For effective surge protection, proper coordination between the first and second stages is crucial, particularly when spark-gap based lightning arresters are used. If a minimum distance of 10 meters between stages cannot be maintained, 15μH separating inductors are recommended.

Backup Protection
Additional protection using backup safety fuses is necessary for the first and second stages to guard against short circuits. Manufacturers provide specific dimensioning for these fuses.

Installation Recommendations
The third stage of surge protection, which includes a high-frequency filter, should be installed as close to the protected appliance as possible, ideally within 15 meters. If the distance exceeds this, additional class III overvoltage protection devices should be used.

Standardized Implementation
Two connection methods for overvoltage cascades are outlined: one prioritizes protection against lengthwise overvoltage, and the other against transverse overvoltage. The document emphasizes the higher risk of transverse overvoltage and recommends focusing on this type of protection.

Catalog excerpts

Mors Smitt Industrial Technology Surge protection devices (SPD) Surge arresters • Lightning arresters Mors Smitt

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Mors Smitt Industrial Technology Surge protection devices (SPD)

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By focusing on product exellence for the industrial market, we contribute to a better environment, health and safety of all people involved

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Mors Smitt Industrial Technology Mors Smitt has been manufacturing relays since 1902. Our wide portfolio is focused on market sectors like power generation & distribution, factory automation, petro-chemical and water treatment plants and general industrial requirements. Production is flexible, standards unforgiving. Many units are tailored to specific client requirements. All products go through extensive testing processes with both hardware and production methodology approved to the highest standards. Surge protection devices Surge protection devices are part of the portfolio of Mors Smitt for...

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Lightning arresters type 1 are used at the boundaries of lightning protection zone 0 and 1. (according to the standards IEC 1312-1 and EN 62305). These arresters are designed for installation in the main switchboard of an application. We offer three types of lightning arresters: Equipped with spark gap Equipped with varistor Equipped with gas discharge tube The combined type 1 + 2 lightning arresters are used at the boundaries of lightning protection zones 0 and 1. (according to IEC 1312-1 and N 62305). They are E used for lightning current equipotential bonding and elimination of witching surges...

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Symbols used in this brochure Class Protection device type 1 according to EN 61643-11 and IEC 61643-1 Protection device class 1 according to IEC 61643-1 Combination protection device TYPE 1 and TYPE 2 according to EN 61643-11 and IEC 61643-1 Combination protection device Class 1 and Class 2 according to IEC 61643-1 Protection device type 2 according to EN 61643-11 and IEC 61643-1 Protection device class 2 according to IEC 61643-1 Protection device type 3 according to EN 61643-11 and IEC 61643-1 on request Protection device class 3 according to IEC 61643-1 Lightning protection zones Applications...

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Selection guide - LPL I Step 1 (object selection) C lassification of typical objects System No. of phases SPD type Circuit Type 1 - at boundaries Coordination of LPZ 0-1 T1 and T2 (lightning arrester) installation <5m Substation Switchboard (kWh) Main switchboard 5 metres cable or decoupling element PI-L (16-120 A ) Main switchboard Coordination of NSP with SPU doesn‘t require separation by longer cable or by decoupling element. (The installation of SPD T2 is necessary, if the length is > 30 m from T1) Substation Switchboard (kWh) Main switchboard 5 metres cable or decoupling element PI-L (16-120...

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Type 2 - at boundaries of LPZ 1-2 (surge arrester) Installation Subsidiary switchboard, switchboards on every floor of the object or in every control panel NSP-T2-275 Subsidiary switchboard, switchboards on every floor of the object or in every control panel NSP-T2-275/3+0 If the distance from T1 is > 30 m. it is necessary to install SPD T2 5 meters of cable or decoupling element PI-L(16-120 A) (Decoupling elements(PI-L) are installed for coordination of T2 and T3. These protect SPD T3 against destruction. If there is a distance between T2 and T3 < 5 m, it is necessary to use decoupling elements....

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(object selection) C lassification of typical objects System No. of phases SPD type Circuit Type 1 - at boundaries Coordination of LPZ 0-1 T1 and T2 (lightning arrester) installation <5m 5 metres cable or decoupling element PI-L (16-120 A ) Substation Switchboard (kWh) Main switchboard 5 metres cable or decoupling element PI-L (16-120 A ) Main switchboard Coordination of NSP with SPU doesn‘t require separation by longer cable or by decoupling element. (The installation of SPD T2 is necessary, if the length is > 30 m from T1) Buildings with considerable level of protection LPL II ( Iimp = 75 kA)...

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Application schematic Industrial application Type 3 Data and communication lines Type 3 Alarm and fire control system Type 3 Wall outlet Main switchboard Subdistribution switchboard Telephone central Control computer Securety system Sensor Server computer Uninterrupted power supply

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