BS EN IEC 62271-213:2021

1   Scope This part of IEC 62271 is applicable to the voltage detecting and indicating system ( VDIS ) to be installed on indoor and outdoor high-voltage equipment . The VDIS as defined by this document includes a coupling system per phase (capacitive, resistive coupling or other technology) to connect to live parts ( main circuit ). The VDIS is applicable on systems with nominal voltage s above 1 kV and service frequencies from 16,7 Hz up to and including 60 Hz. The VDIS is used to detect and indicate the presence or absence of operating voltage . It is not intended to distinguish between voltage not present (i.e. U < 10 % of nominal voltage ) and dead circuit state (i.e. U = 0 V).

   NOTE 1  The use of a specific means of connection to earth of the  main circuit  (e.g. by an earthing switch) provides the "dead circuit" ( U  = 0 V) state. 


 
   NOTE 2  The   VDIS   has the same threshold values as the voltage presence indicating system (VPIS) ([IEC 62271‑206](/search?q=IEC%C2%A062271%E2%80%91206)) and the voltage detecting system (VDS) ([IEC 61243‑5](/search?q=IEC%C2%A061243%E2%80%915)) for not indicating presence of voltage and for detecting an absence of   operating voltage   , respectively. 

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