2.22 Sensitive Earth Fault Protection (ANSI 51GN, 64R)
139
7UM61 Manual
C53000-G1176-C127-3
Use as Earth Short-
Circuit Protection
For low-voltage machines with incorporated neutral conductor or machines with low-
impedance earthed starpoint, the time-overcurrent protection of the phase branches
already is an earth short-circuit protection, since the short-circuit current also flows
through the faulty phase. If the sensitive earth current detection nevertheless is be
used as earth short-circuit protection, an external intermediate transformer must be
employed to ensure that the thermal limit values (15 A continuous, 100 A for <10 s,
300 A for <1 s) of this measuring input are not exceeded by the short-circuit current.
2.22.3 Settings
2.22.4 Information List
Addr. Parameter Setting Options Default Setting Comments
5101 O/C PROT. Iee> OFF
ON
Block relay
OFF Sensitive Earth Current Protec-
tion
5102 IEE> 2 .. 1000 mA 10 mA Iee> Pickup
5103 T IEE> 0.00 .. 60.00 sec; ∞ 5.00 sec T Iee> Time delay
5104 IEE>> 2 .. 1000 mA 23 mA Iee>> Pickup
5105 T IEE>> 0.00 .. 60.00 sec; ∞ 1.00 sec T Iee>> Time Delay
5106 IEE< 1.5 .. 50.0 mA; 0 0.0 mA Iee< Pickup (Interrupted Circuit)
No. Information Type of In-
formation
Comments
1202 >BLOCK IEE>> EM >BLOCK IEE>>
1203 >BLOCK IEE> EM >BLOCK IEE>
1221 IEE>> picked up AM IEE>> picked up
1223 IEE>> TRIP AM IEE>> TRIP
1224 IEE> picked up AM IEE> picked up
1226 IEE> TRIP AM IEE> TRIP
1231 >BLOCK Sens. E EM >BLOCK sensitiv earth current prot.
1232 IEE OFF AM Earth current prot. is swiched OFF
1233 IEE BLOCKED AM Earth current prot. is BLOCKED
1234 IEE ACTIVE AM Earth current prot. is ACTIVE
5396 Fail. REF Iee< AM Failure R/E/F protection Iee<
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