Using of an Multistage Surge protection results in easy and simplified method of planning and installation of Surge protectors.

The complex analyses and multitude of criteria defined in lightning protection standards (IEC 62305 & ANSI/IEEE C62.41. 1-2) become the past.

The final result is an easy guideline of definition of type and place of installation of surge protectors.

Expelling the requirements for using several different types of surge prote-ctors in a different lightning boundary zone (LPZ0a/b-LPZ3 & C-A ) presents great advantage and innovation for end users.

With AC DC MOS Protectors planning and installation of surge protection is not just reserved for an expert surge engineers but it is available to wide branch of professions. (electrician, construction builders, IT..)

AC DC MOS Protectors - Rail Din Series (Blue, Green and Red series) could be fitted in Series or Parallel configuration depending of total utility load per phase.

1. If the total load per phase is lower than < 100A (22kW on 220VAC & 11kW on 110VAC)) the AC DC MOS Protector - Rail Din Series should be installing at a utility entrance (main distribution board) in SERIES configurations (single or three phases, follow the manufacturer installation instruction).

- No additional protectors are need because the surge protector is CLASS I+II+III

2. If the total load per phase is higher than > 100A (22kW on 220VAC & 11kW on 110VAC)) the AC DC MOS Protector - Rail Din Series should be installed at a utility entrance (main distribution board) in PARALLEL configurations (single or three phases, follow the manufacturer installation instruction).

- Parallel connections of surge protectors don't guarantee maximal protection of electronics devices. The network distribution should be followed downstream to the sub distribution board.

If AC DC MOS Protectors are installed in SERIES configuration they have full active 8 protection stages.

If AC DC MOS Protectors are installed in PARALLEL configuration they had full active just 2 (second and 4 (fourth) protection stages. The rest of protection stages no. 1,3,5 and 6 are part active.

Only SERIES configurations can guarantee maximum protection. If PARALLEL protection is applied, it is recommended to use AC DC MOS Protector's in a series configuration downstream to loads. The load should be < 100A per phase for SERIES configuration of AC DC MOS Protectors.