2 Functions
32
7UM61 Manual
C53000-G1176-C127-3
Parameter 104 FAULT VALUE is used to specify whether the oscillographic fault re-
cording should record Instant. values or RMS values. If RMS values is stored,
the available recording time increases by the factor 16.
For the high-current stage I>> of the overcurrent protection, address 113O/C PROT.
I>> determines whether Non-Directional or directional is to be operative. By
selecting Disabled, this overcurrent stage can be excluded altogether. With inverse
time overcurrent protection 114O/C PROT. Ip, depending on the ordered variant,
various characteristics are available for selection, in accordance with IEC or ANSI
standard. Selecting 'disabled' deconfigures inverse time overcurrent protection.
For earth fault protection, Address 150 S/E/F PROT. presents the options non-
dir. U0, non-dir. U0&I0 and directional, unless the whole function is
Disabled. The first option evaluates only the displacement voltage (to be used with
unit connection). The second option evaluates in addition to the displacement voltage,
the magnitude of the earth fault current (or the difference between the starpoint current
and the total current of a toroidal CT in busbar systems with low-ohmic switchable star-
point resistors). The third option considers as a further criterion the direction of the
earth fault current if with machines in busbar connection the magnitudes of displace-
ment voltage and earth fault current alone are not sufficient to distinguish between
system earth faults and machine earth faults.
For trip circuit monitoring, address 182 Trip Cir. Sup. is used to specify whether
two binary inputs (2 Binary Inputs) or only one (1 Binary Input) should be
utilized.
2.2.3 Settings
Addr. Parameter Setting Options Default Setting Comments
103 Grp Chge OPTION Disabled
Enabled
Disabled Setting Group Change Option
104 FAULT VALUE Disabled
Instant. values
RMS values
Instant. values Fault values
112 O/C PROT. I> Disabled
Enabled
Enabled Overcurrent Protection I>
113 O/C PROT. I>> Disabled
directional
Non-Directional
Non-Directional Overcurrent Protection I>>
114 O/C PROT. Ip Disabled
with IEC
with ANSI
Disabled Inverse O/C Time Protection
116 Therm.Overload Disabled
Enabled
Enabled Thermal Overload Protection
117 UNBALANCE LOAD Disabled
Enabled
Enabled Unbalance Load (Negative Se-
quence)
130 UNDEREXCIT. Disabled
Enabled
Enabled Underexcitation Protection
131 REVERSE POWER Disabled
Enabled
Enabled Reverse Power Protection
132 FORWARD POWER Disabled
Enabled
Enabled Forward Power Supervision
133 IMPEDANCE PROT. Disabled
Enabled
Enabled Impedance Protection
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