EMR-5000
IM02602012E
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:
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.
www.eaton.com
981
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 .
