CPT-Cirprotec-V-OVERVOLTAGE-AND-SURGE-PROTECTION
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Overvoltage and Surge Protection Check our full Catalogue Transient and Power frequency Overvoltages (POP)

Class I+II Pluggable Surge Protectors PSC stands for the renewed design and extended scope of the range of pluggable Type 1+2 protectors, for use in service entrances or areas exposed to lightning activity. Iimp (10/350): 12,5kA, 25kA,... Imax (8/20): 65kA, 100kA ,... Un: 120V, 230V,... Class II Pluggable Surge Protectors PSM stands for the renewed design and extended scope of the range of pluggable Type 2 surge protectors against transient overvoltages. Imax (8/20): 20kA, 40kA Un: 120V, 230V Network configurations: TT, TNS, TNC and PV Diagnostics: visual & remote indication PSM Surge...

Power Frequency Overvoltage Protectors (POP) Overcheck is a programmable self-reclosing device, comprising a control unit and circuit breaker which automatically disconnects the supply when voltage, current or earth leakage exceed preset threshold values, and reconnects the supply when these return to permissible values. Insulation Monitoring Device ISO-CHECK PV ISO-CHECK Iso-Check is the insulation monitor for unearthed power supplies such as IT systems. Iso-Check continuously measures the insulation resistance between the active conductor and ground. Available for voltages up to 440Vac....

LEGEND OF SYMBOLS Type of protection Surge protective devices (SPD) for electrical power supply networks Type of overvoltage protection Discharge capacity Transient overvoltage protector (SPD) Protector format Surge protective devices (SPD) for telecom and signalling networks Pluggable format, replaceable surge cartridges or modules Medium Monobloc format Fine Power frequency overvoltage protectors (POP) for electrical power supply networks Combined transient and power frequency overvoltage protector (SPD + POP) Features of the protector + Includes MCB MCB Power frequency overvoltage...

Electrical and electronic equipment is indispensable in the daily activities of today's businesses and individuals. Such devices are connected to the electricity grid, often exchanging data and signals through communication lines and are usually sensitive to disturbances. These interconnecting networks provide a propagation path for overvoltages. Protection against lightning and overvoltages not only ensures the safety of people, goods and equipment, but also ensures continuity of installation services and meet criteria of energy efficiency. Overvoltage protection extends the life of the...

Why Cirprotec? Overvoltage & surge protector Specialists in lightning and surge protection Cirprotec (CPT) is a pioneer in the design and manufacture of lightning and surge protection devices.It has an extensive network of sales offices and is present in over 60 countries. ESE Lightning rods Grounding system and insulation monitoring Comprehensive solution: protection, control and safety CPT offers a wide range of specific products to provide a solution for any type of needin the field of lightning and surge protection. • Internal protection (surge and overvoltage protectors) • External...

What are Overvoltages? Theoretical concepts What are overvoltages? Transient overvoltages (SPD) Transient overvoltages are surges that can reach tens of kilovolts with a duration of the order of microseconds. Despite their short duration, the high energy content can cause serious problems to equipment connected to the line, from premature aging to destruction, causing disruptions to service and financial loss. This type of surge can have various different causes, including atmospheric lightning directly striking the external protection (lightning rods) on a building or transmission line or...

Theoretical concepts Power frequency overvoltages (POP)** Besides the phenomenon of transient overvoltages, which may affect any type of conductor, electric transmission lines can transmit another type of overvoltage, known as power frequency overvoltages. These are considered to be any voltage increase above 10% of the effective nominal value for an indefinite period. POP overvoltages are caused by problems in the electricity distribution network or, more commonly, by bad connections or breakage of the neutral conductor. Most electric distribution systems in the world use a neutral...

Theoretical concepts General operation of a protector A transient overvoltage protection device acts as a voltage controlled switch and is installed between the active conductors and ground in parallel with the equipment to be protected. When the supply voltage is lower than its activation voltage, the protector acts as a high-impedance element so that no current flows through it. By contrast, when the supply voltage is higher than the activation voltage, the protector acts as an element with an impedance close to zero, leading the overvoltage to earth and preventing it from affecting the...

Transient Overvoltages IEC Theoretical concepts Protection parameters according to IEC 61643-1 Protector parameters Classification of protectors Protection devices are classified according to discharge capacity: Class I Tested with a 10/350 µs waveform (Class I test), which simulates the current produced by a direct lightning strike. Maximum residual voltage between the terminals of the protection device during the application of a peak current. NOMINAL CURRENT Peak current in 8/20 μs waveform the protection device can withstand 20 times without reaching end of life. MAXIMUM DISCHARGE...

Theoretical concepts Selection of Up based on the category of equipment to be protected The protection device should be selected so that the voltage protection level (Up) is compatible with (lower than) the value of the maximum voltage withstood by the equipment to be protected (Ue). For the purposes of standardising design criteria and selection of protection devices, IEC standard 60364-4-443 classifies equipment into four categories, based on the impulse voltage they are capable of withstanding. N/A: Not Applicable NOTE 1: Uo is the phase to neutral voltage of the low voltage supply NOTE...