L 2/20 230 3+1
Low Voltage Surge Protective Device
L 2/20 230 3+1 is a ready to install assembly of three voltage limiting and a voltage switching SPD providing four modes of protection. Typically installed in Sub Distribution Boards (SDBs) for three-phase plus neutral 230/400 V TT-systems where connection type CT2 (3+1) is required according to HD 60364-5-534, e.g. in the service entrance board (SEB), with the following features and benefits:
- Impulse test classification: Test class II according to IEC 61643-11 Ed. 1 (2011-03) and Type 2 according to
EN 61643-11 (2012-10);
- Short circuit current withstand of 50 kA rms with max. back-up fuse;
- NFC No Follow Current® technology, there are no follow currents drawn from the power supply system after operation.