Surge Protection Main Catalogue
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Surge Protection

• Combined lightning current and surge arrester type 1 + type 2 for use in photovoltaic generator circuits • Space-optimised enclosure with a width of only four modules for up to 1500 V d.c. • Patented SCI technology prevents fire damage caused by d.c. switching arcs • Type 2 surge arrester with IP 65 degree of protection for the d.c. side of PV systems up to 1000 V with patented SCI technology • Prewired complete unit can be easily and quickly installed directly next to the equipment to be protected without requiring space in a separate insulating enclosure • 1 MPP and 2 MPP versions See...

Our Promise - DEHN protects. 3 Surge Protection for Red I Line Power Supply Systems 13 SPDs for low-voltage Installations and Devices Surge Protection for Yellow/Line Information Technology Systems 189 SPDs for Installations and Devices Lightning Equipotential Bonding 391 Isolating Spark Gaps and Components Old / Discontinued Products / Alternative Products 420

DEHN protects. Our family-owned company specialises in surge protection, lightning protection and safety equipment. Therefore, we are doing the utmost to protect lives and assets. Our pioneering spirit and innovative ideas have defined our company for more than 100 years and made us a market leader with about 1,600 employees. Our market insight, determination and ideas are reflected in our products and safety concepts. “We are a reliable partner for our customers and employees.” Dr. Philipp Dehn Executive Director As early as in 1923, our founder Hans Dehn started to produce external...

DEHN – Worldwide DEHN + SÖHNE GmbH + Co.KG. Sales activities in more than 70 countries worldwide Subsidiaries and offices worldwide Australia: DEHN office Melbourne Austria: DEHN AUSTRIA GmbH China: DEHN Surge Protection (Shanghai) Co. Ltd. Czech Republic: DEHN office Prague Denmark: DESITEK A/S France: DEHN FRANCE S.à.r.l. Great Britain: DEHN (U.K.) LTD. Hungary: DEHN office Budapest India: DEHN INDIA Pvt. Ltd. Algeria Angola Argentina Belgium Belize Bolivia Botsuana Brazil Bulgaria Burundi Cameroon Canada Cape Verde Central African Republic Chad Chile Colombia Comoros Costa Rica Croatia...

Planned Safety Failure of technical installations and systems in residential and functional buildings is very unpleasant and expensive. Therefore, faultless operation of devices must be ensured both during normal operation and thunderstorms. The number of annually registered lightning activities in Germany maintained at a constantly high level over many years. Damage statistics of insurance companies clearly show that there are deficits in terms of lightning and surge protection measures both in the private and commercial sector (Figure 1). A professional solution allows to take adequate...

Planned Safety ponents and devices protecting against direct lightning strikes (Figure 4). In addition to the voltage drop at the conventional earthing impedance, surges are generated in the electric building installation and the systems and devices connected to it due to the inductive effect of the electromagnetic lightning field (Figure 3, case 3). The energy of these induced surges and of the resulting impulse currents is far lower than the energy of a direct lightning impulse current and is therefore described by a 8/20 μs impulse current wave form (Figure 4). Components and devices...

Planned Safety L Figure 5.1: Transition from LPZ 0A to LPZ 0B (above) M Figure 5.2: Transitions from LPZ 0A to LPZ 1 and LPZ 0B to LPZ 1 (below) arresters used at the transition from lightning protection zone 0A to 1 or 0A to 2. These arresters must be capable of conducting partial lightning currents of 10/350 μs wave form several times without being destroyed in order to prevent the ingress of destructive partial lightning currents into the electrical installation of a building. At the transition point from LPZ 0B to 1 or downstream of the lightning current arrester at the transition point...

Planned Safety Figure 5.3: Transition from LPZ 1 to LPZ 2 Lightning equipotential bonding Lightning current arrester (type 1) Local equipotential bonding Surge arrester (type 2/3) Figure 5.4: Transition from LPZ 2 to LPZ 3 Lightning protection zone MEB Main earthing busbar Equipotential bonding Air-termination system Low-voltage supply system Supply line (metal) Information technology system IEC 62305-4:2010 Outer zones: LPZ 0 Zone where the threat is due to the unattenuated lightning electromagnetic field and where the internal systems may be subjected to full or partial lightning surge...

Terms and Definitions actiVsense® The actiVsense technology is integrated in universal combined arresters for protecting information technology installations and devices. The arrester automatically detects the signal voltage applied and optimally adapts the voltage protection level to it. Thus, the arrester can be universally used for different interfaces and provides maximum protection for the devices and system circuits connected to it in case of failure. Breaking capacity, follow current extinguishing capability Ifi The breaking capacity is the uninfluenced (prospective) r.m.s. value of...

Terms and Definitions Nominal discharge current In The nominal discharge current is the peak value of a 8/20 μs impulse current for which the surge protective device is rated in a certain test programme and which the surge protective device can discharge several times. Nominal load current (nominal current) IL The nominal load current is the maximum permissible operating current which may permanently flow through the corresponding terminals. Nominal voltage UN The nominal voltage stands for the nominal voltage of the system to be protected. The value of the nominal voltage often serves as...

Terms and Definitions Short-circuit withstand capability The short-circuit withstand capability is the value of the prospective power-frequency short-circuit current handled by the surge protective device when the relevant maximum backup fuse is connected upstream. Short-circuit rating ISCPV of an SPD in a photovoltaic (PV) system Maximum uninfluenced short-circuit current which the SPD, alone or in conjunction with its disconnection devices, is able to withstand. Temporary overvoltage (TOV) Temporary overvoltage may be present at the surge protective device for a short period of time due...