ComAp MainsPro G99TT Global Manual page 17

Mains decoupling protection relay
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2. Under normal conditions the Off coil is not powered and contacts are open. In case of failure, the contacts
(12) close and the voltage is applied on the Off coil, therefore auxiliary power supply (e.g.UPS) is
necessary to provide voltage for the Off coil.
17
MainsPro G99TT 1.0.0 Global Guide

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