:: Basic and fast overvoltage protection for one disconnection module.
:: Basic overvoltage protection at distribution frame using three-pole gas discharge tubes with fail-safe.
:: Fast overvoltage protection using three-pole gas discharge tubes with fail-safe and varistors.
:: Hyper-fast overvoltage protection using three-pole gas discharge tubes with fail-safe and diodes.
:: To choose the right type of surge protection at the distribution frame, certain principles must be considered, such as quality of service, costs and safety of the personnel. Causes of dangerous surges i.e. overvoltages and overcurrents could be:
- atmospheric discharges (direct or near lightning strikes)
- inductive influence of near high voltage plants
- cross-contact between the power and the telecommunication line
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