Lewden SRG1123 2 Module 1Ph Type 1, 2 & 3 Combined TT/TN-S Surge Protection Device

Technical Info:
Incoming Terminal Capacity: 10 - 35 mm²
Maximum Discharge Current: 50kA
Mounting: DIN Rail
Number of Modules: 2
Number of Poles: Single Pole and Neutral
Outgoing Terminal Capacity: 10 - 35 mm²
Standards: BS EN61643-11, IEC 61643-1
Suitable For: TN-S and TT Earthing
Type: 1 + 2 + 3

TYPES OF SURGE PROTECTION DEVICES:
Surge devices are categorised into three types, according to their strength;
Type 1: These devices offer protection against the effects of a lightning surge. The devices must be installed at the origin of the electrical installation, where they guard against direct lightning currents entering the system from outside the premises. They must be able to withstand large amounts of charge and energy. Type 1 devices must be installed where buildings include a lightning protection system, or the building is fed from overhead power lines (which themselves are at direct risk of lightning strike).
Type 2: These devices are designed for use within sub-distribution boards located downstream of a type 1 device, OR at the origin of an installation only where there is little or no risk from direct lightning strike (as determined by the risk assessment calculation Type 2 devices cannot offer protection against the effects of a direct lightning surge. They are primarily suitable for buildings located in an urban area, without an external lightning protection system, and fed from an underground power source
Type 3: These devices are the smallest of the 3 types, and are designed to be installed downstream of type 1 or 2 devices where they afford protection to individual pieces of sensitive or valuable electrical/electronic equipment. Type 3 SPDs cannot be installed at the origin of an installation.

Delivery Costs

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