3.4.7 Over-current (ANSI 50TD)
Protection
IEC symbol (IEC60617)
ANSI (IEEE C37.2)
IEC 61850
Operate time
Over-current
3I>, 3I>>
50TD
PTOC
< 100 ms
The alarm response is based on the highest phase current true RMS values from the source,
as measured by the controller.
Set
point
Value
time
Delay
Configure the parameters under
Configure > Parameters > [Source] > Current protections > Over-current #
, where # is 1 or 2.
Table 3.35
Default parameters
Parameter
Range
Over-current 1
Over-current 2
Set point
Variable. Depends on current transformer settings.
100 %
110 %
Delay
0.00 s to 1 h
20 s
60 s
Enable
Not enabled, Enabled
Enabled
Enabled
Latch
Not enabled, Enabled
Not enabled
Enabled
Alarm action
Warning
Trip [Breaker]
3.4.8 Fast over-current (ANSI 50/50TD)
Protection
IEC symbol (IEC60617)
ANSI (IEEE C37.2)
IEC 61850
Operate time
Fast over-current
3I>>>
50/50TD*
PIOC*
< 50 ms
*Note: ANSI
50
and IEC 61850-5
PIOC
apply when the
Delay
parameter is 0 s.
The alarm response is based on the highest phase current true RMS values from the source,
as measured by the controller.
Set
point
Value
time
Delay
Configure the parameters under
Configure > Parameters > [Source] > Current protections > Fast over-current #
, where # is 1
or 2.
Table 3.36
Default parameters
Parameter
Range
Fast over-current 1
Fast over-current 2
Set point
Variable. Depends on current transformer settings.
200 %
300 %
Delay
0.00 s to 1 h
0.00 s
0.00 s
Enable
Not enabled, Enabled
Not enabled
Not enabled
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