What would happen if during a measurement of transformer winding resistance a current lead got disconnected from Transformer? Is RMO30T instrument protected for this accident or not?
It is strongly recommended that RMO30T equipotential connector is always connected to protective ground (PE) before measurement . If during a measurement any current lead gets disconnected from the transformer, then the energy stored in the transformer magnetic circuit will be automatically discharged through voltage sense cables and built-in discharging circuit in our RMO30T device, also sometimes through the ground cable. However, it is strongly recommended to ensure all connections in order to avoid such accidental disconnecting since the RMO30T can be damaged. This is valid for all devices of the RMO-T series. You should note that our devices RMO30T, RMO40T and RMO50T have mechanical protection from accidental disconnecting of current cables. If you plug-in current cables into sockets of RMO30T or RMO40T or RMO50T devices and turn them (lock them) in clockwise direction, current cables can not be disconnected accidentally from the instrument.
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