- OLD SERIES. ASK TO THYTRONIC CUSTOMER SUPPORT FOR AVAILABILITY -

The maximum residual voltage relays series DVD are designed for the protection against earth faults, in systems with insulated neutral or with resistance or impedance earthed neutral. Thanks to their band pass filter, they are insensitive to transients and harmonic components which can arise in voltage circuits.
They can be connected to the secondary of a VT connected to the neutral of the system, or to the open delta secondary connection of three line VT's, or else in three-phase version to the secondaries of three line VT's, to avoid the star / open delta adapter transformer.