37SIPROTEC 7SJ81/7SK81 V4.70, Product Information
E50417-K1150-C462-A2, Edition 02.2012
1)
Depending on the ground current input the function will be either
sensitive (INS) or non-sensitive (IN).
Functions
Pos.15
Designation
ANSI-No.
Description
Basic function
(included in all
versions)
50/51 Time overcurrent protection phase
50-1, 50-2, 50-3, 51,
A
50N/51N Time overcurrent protection ground
50N-1, 50N-2, 50N-3, 51N
50N(s)/
51N(s)
1)
Sensitive ground fault protection
50Ns-1, 50Ns-2, 51Ns
49 Overload protection
74TC Trip circuit supervision
50BF Circuit-breaker failure protection
46 Negative-sequence protection
37 Undercurrent monitoring
86 Lock out
– Parameter changeover
Monitoring functions
Control of circuit-breaker
Flexible protection functions (current
parameters)
Inrush restraint
Basic function +
Directional phase
and ground
overcurrent,
directional
sensitive ground
fault, voltage and
frequency protec-
tion
67 Directional overcurrent protection phase
I>, I>>, Ip
C
67N Directional overcurrent protection ground
IE>, IE>>, IEp
67N(s)
1)
Directional sensitive ground fault
protection IEE>, IEE>>, IEEp
59N Displacement voltage
27/59 Under-/Overvoltage
81 U/O Under-/Overfrequency, f<, f>
47 Phase rotation
32/55/
81R
Flexible protection functions (current and
voltage parameters)
Protective function for voltage, power,
power factor, frequency change
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