If you already have grounding resistors in M.T. and want to monitor the continuity of the circuit to ground, thus avoiding rupture and consequent transient overvoltages during faults, we have an upgrade: the UMT-01. Easily installable, the unit can alert about ruptures even remotely.
The equipment is composed of an electronic unit and a resistive sensor, which operates with the injection of an online controlled current in the form of a loop circulating through the circuit to be monitored. If the continuity is lost, the loop will be interrupted and the unit will issue the alert, which can be given either by tactile switch or remotely.
At the user's discretion, there may be monitoring of the neutral-resistor-ground section or
just the integrity of the resistor. The UMT-01 unit can additionally incorporate an LED signaling the presence of the auxiliary supply voltage and provide auxiliary contacts for remote indication of occurrences.
Resistive sensor:
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