Time Current Curves (Ground Current) - Eaton EDR-5000 Nstallation, Operation And Maintenance Manual

Time Current Curves (Ground Current)

The following characteristics are available:
NINV (IEC/XInv);
VINV (IEC/XInv);
LINV (IEC/XInv);
EINV (IEC/XInv);
MINV (ANSI/XInv);
VINV (ANSI/XInv);
EINV (ANSI/XInv);
Thermal Flat;
Therm Flat IT;
Therm Flat I2T; and
Therm Flat I4T.
Explanation:
t = Tripping delay
t-multiplier = Time multiplier/tripping characteristic factor . The setting range
depends on the selected tripping curve.
IG = Fault current
Pickup = If the pickup value is exceeded, the module/element starts to time out to trip .
The ground current can be measured either directly via a zero sequence transformer or detected by a residual
connection. The ground current can alternatively be calculated from the phase currents; but this is only possible if the
current transformers are Wye-connected.
EDR-5000
www.eaton.com
IM02602007E
955