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What is an internal monitoring?

A speciality of the system is the internal monitoring feature which indicates abnormal conditions such as interruption, earth fault or malfunction of certain connected devices.
What is an internal monitoring?
An internal failure will be indicated by the lamp of the unit containing the detection circuits for that particular fault. Further indication is given by light emitting diodes, visible when the front plate is removed.

The basic unit and the additional monitoring unit each have one contact, opening at internal alarm state.

Synchronizing/load sharing unit and relay unit are connected to the basic unit in order to affect this contact.

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