41
SIPROTEC 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
48
Starting time supervision
14
Locked rotor protection
51M
Load jam protection
66/86
Restart inhibit
–
Parameter changeover
Monitoring functions
Control of circuit-breaker
Flexible protection functions (current
parameters)
Inrush restraint
Motor statistics
Basic fu
Directional ground
overcurrent,
directional sensi-
tive ground fault,
voltage and fre-
quency protection
67N
Directional overcurrent protection ground
IE>, IE>>, IEp
C
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