Deif PPM 300 - Source] Under-Voltage (ANSI 27)

3.4.3 [Source] under-voltage (ANSI 27)
Protection IEC symbol (IEC60617) ANSI (IEEE C37.2) IEC 61850 Operate time
Under-voltage U<, U<< 27 PTUV < 100 ms
The alarm response is based on the lowest phase-to-phase voltage, or the lowest phase-to-
neutral voltage, from the source, as measured by the controller. The phase-to-phase voltage is
the default.
Set
point
Value
time
Delay
Configure the parameters under Configure > Parameters > [Source] > Voltage protections > Under-voltage #, where # is 1 or 2.
Table 3.29
Default parameters
Parameter Range Under-voltage 1 Under-voltage 2
Set point 50 to 100 % of nominal voltage 95 % 80 %
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
Action Warning Block
Table 3.30 Default inhibits
Controller type Inhibit(s)
GENSET
• Generator breaker closed
• Engine not running
EMERGENCY genset
• Engine not running
• EDG in parallel
• EDG handling blackout
SHAFT generator
• Shaft breaker closed
• Shaft generator not running
SHORE connection • Shore breaker closed
3.4.4 [Source] voltage unbalance (ANSI 47)
Protection
IEC symbol (IEC60617) ANSI (IEEE C37.2) IEC 61850 Operate time
Voltage unbalance (voltage asymmetry) UUB> 47 - < 200 ms*
*Note: This operate time includes the minimum user-defined delay of 100 ms.
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