The alarm response is based on the highest fundamental frequency (based on phase voltage),
from the source. This ensures that the alarm only activates when all of the phase frequencies
are below the set point.
Set
point
Value
time
Delay
Configure the parameters under
Configure > Parameters > [Source] > Frequency protections > Under-frequency #
, where # is
1 or 2.
Table 3.45
Default parameters
Parameter
Range
Under-frequency 1
Under-frequency 2
Set point
80 to 100 % of nominal frequency
95 %
93 %
Delay
0.00 s to 1 h
5.00 s
3.00 s
Enable
Not enabled, Enabled
Enabled
Enabled
Latch
Not enabled, Enabled
Not enabled
Enabled
Alarm action
Warning
Block
Table 3.46
Default inhibits
Controller type
Inhibit(s)
GENSET
•
Generator breaker closed
•
Engine not running
EMERGENCY genset
•
Generator breaker closed
•
Tie breaker closed
•
Engine not running
SHAFT generator
•
Shaft breaker closed
•
Shaft generator not running
SHORE connection
•
Shore breaker closed
3.4.16 Overload (ANSI 32)
Protection
IEC symbol (IEC60617)
ANSI (IEEE C37.2)
IEC 61850
Operate time
Overload
P>, P>>
32
PDOP
< 100 ms
The alarm response is based on the active power (all phases), from the source, as measured
by the controller.
Set
point
Value
time
Delay
Configure the parameters under
Configure > Parameters > [Source] > Power protections > Overload #
, where # is 1 or 2.
DESIGNER'S HANDBOOK 4189340911K UK
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