INSTALLATION
DS250VG-300 Type 1+2+3 AC surge protector - 1 pole is connected in parallel on the AC network and must be equipped with external fuses for short-circuit current protection
- The total length of parallel connection wires to AC network must be lower than 0.5 m in order not to increase the protection level (Up) provided by the SPD.
- Wiring is made by screw connections. On some models, a distribution bus can be used.
- The protection wire coming from the SPD must be connected to the bonding bar of the electrical panel. Paralleling the protection wire with phases conductors must be avoided.
- The cross sectional wire must be 6 mm² minimum for Type 2 SPD and 16 mm² for Type 1.
- Local earthing resistance must be in compliance with the electrical rules.
Further information can be found in IEC 61643-12 standard (selection and application principles for low voltage SPD).
- Combine two DS250VG-300 to get DS252VG-300 used for AC single phase network
- Combine three DS250VG-300 to get DS253VG-300 used for AC 3-phase network TNC/IT
- Combine four DS250VG-300 to get DS254VG-300 used for AC 3-phase + N network TNS
- Combine three DS250VG-300 + DS100EG-600 to get DS254VG-300/G used for AC 3-phase + N network TT/TNS