Coordinated Facility Protection Catalog
76Pages

Coordinated Facility Protection Selecting Surge Protection

Special Application Products

Introduction By following the Six Point Plan of Protection, ERICO customers are able to implement the most effective solutions to individual lightning, grounding and surge problems while retaining an integrated protection philosophy. The Six Point Plan of Protection from ERICO Capture the lightning strike. Capture the lightning strike to a known and preferred attachment point using a purpose-designed air terminal system. Convey this energy to ground. Conduct the energy to the ground via a purpose-designed downconductor. Point 5 of the Six Point Plan advocates a coordinated approach to surge...

The Need for Coordinated Protection Critical Factors Critical factors need to be considered when determining the need for facility protection. Many factors can be determined by answering the following questions: • What is the risk to personnel? • What is the risk of equipment damage? • What are the consequences of equipment failure? • Is the equipment associated with an essential service? • How will equipment failure affect overall facility operation and revenue generation? • What are the legal implications of providing inadequate protection? The statistical nature of lightning and the...

The Need for Coordinated Protection Reliable protection of structures, industrial and commercial operations and personnel, demands a systematic and comprehensive approach to minimizing the threats caused by transient over-voltages. Grounding, bonding, lightning protection and surge protection all need to be considered for comprehensive facility electrical protection. Each of these are interdependent disciplines that need a holistic design approach to ensure the facility is not left with a vulnerable “blind spot”. The investment in surge protection can be wasted if “blind spots” exist. For...

Selecting Surge Protection RECOMMENDED SURGE RATINGS (8/20µs) CAT C POINT-OF-ENTRY HIGHLY EXPOSED OR CRITICALLY IMPORTANT SITES POINT-OF-ENTRY EXPOSED OR RURAL SITES POINT-OF-ENTRY INNER CITY SITES DISTRIBUTED CIRCUITS, POWER OUTLETS, CIRCUITS REMOTE FROM POINT-OF-ENTRY SUB CIRCUITS OR NEAR TO POINT-OF-ENTRY RECOMMENDED PRODUCTS PRODUCT SERIES

Selecting Surge Protection Recommended Surge Ratings – A Comparison between IEC and IEEE® Recommendations Competition between SPD manufacturers has seen everincreasing surge ratings being offered to the market, to the point where surges of this magnitude are unlikely to ever occur in nature. A number of sources provide information on the statistical distribution of the current discharge of the direct lightning strike. Many studies have shown that peak lightning discharges above 100kA are likely to occur less than 5% of the time. Combined with the fact that most discharges do not strike the...

A Guide to Common Power Distribution Systems Throughout the world a number of different power distribution systems are used. This guide identifies the more common of these systems. The individual product specification tables detail system suitability. Source Configuration Single Phase 1Ph, 3W+G Also known as Split phase or Edison system Three Phase WYE without neutral 3Ph Y, 3W+G Three Phase WYE with neutral 3Ph Y, 4W+G Delta Grounded corner 3Ph ∆, 3W+G

A Guide to Common Power Distribution Systems The IEC® 60364 series of standards characterizes low-voltage distribution systems by their grounding method and the arrangement of the neutral and protective earth conductors. The selection of SPDs must consider among other issues, the level of over-voltage that may temporarily occur within the distribution system due to ground faults. IEC 61643-12 details the temporary over-voltages that may occur during fault conditions for these systems. To conform with European wiring rules an SPD with a Uc rating equal to, or greater than, this value should...

A Guide to Common Power Distribution Systems TN-C-S System In this, a separate neutral and protective earth combine in a single PEN conductor. This system is also known as a Multiple Earthed Neutral (MEN) system and the protective conductor is referred to as the Combined Neutral Earth (CNE) conductor. The supply PEN conductor is earthed at a number of points throughout the network and generally as close to the consumer’s point-of-entry as possible. All exposed-conductive-parts are connected to the CNE conductor. Source Main Distribution Board Sub/Branch Distribution Board * nstall fuse A if...

A Guide to Common Power Distribution Systems IT System A system having no direct connection between live parts and earth but all exposed-conductive-parts of the installation being connected to independent earthed electrodes. Distribution Network Configuration TN-C with neutral conductor without neutral conductor Phase (line) and Neutral Conductor Each Phase (line) Conductor and PE Each Phase (line) Conductor and PEN SPD Uc Selection: Uo = Voltage between phase (line) and neutral conductor X = Not applied SPD selection must consider the level of over-voltage that may occur within the...

Data and Signal Line Protection How to select surge protection for data, signalling and control circuits How to select an SPD for a given location Knowing where to install surge protection can be difficult. To ensure cost-effective protection is provided for data, signalling and control circuits, two issues need to be considered: Five parameters must be considered to ensure that surge protection devices for use on data, signalling or control circuits are effective and do not adversely affect operation of the circuit. • Where should the SPDs be installed? • hat type of SPD is appropriate for...

Data and Signal Line Protection Sample Applications 2-Wire Isolated Ground Transducers/Sensors UTB-XSPG Signal Ground Protective Ground Signal Ground Protective Ground Pressure Transmitter Powered Sensor Protection UTB30DPS Flow Meter Multiple Sensor or up to 4-Wire Sensor UTB-XDP Fire Alarm Protecting Sensors in Hazardous Locations UTB-EX UTB-EX Hazardous Field Sensor + Current Loop - Supply