Issue :
V0 FAULT

Product :
Easergy SEPAM 80 relay

Resolution:
This means that Neutral voltage displacement protection function has operated in your system .

Neutral voltage displacement Description:
Protection against insulation faults by measuring the residual voltage V0 or the neutral point voltage Vnt for generators and motors. The residual voltage is obtained by the vector sum of the phase voltages or by measurements using delta connected VTs. The neutral point voltage is measured by a VT inserted in the neutral point of the generator or the motor. The protection function includes a time delay T, either definite or IDMT (dependent on the residual voltage V0) (see tripping curve equation on page 226 in our sepam 80 manual _ reference is SEPED303001EN). It operates only when a residual or neutral point voltage is available, by connecting V1V2V3, V0 or Vnt.

How to solve this fault :
Thanks to check V0 operation & take the necessary action to clear this fault .
Once fault is clear at the site then you can clear the fault in the HMI of display ((using clear key in the display).

Released for:Schneider Electric Nigeria