GPU, GPC, PPU
Option C1 is a software option and therefore not related to any hardware apart from the
standard-installed hardware. Option C1 is a mix of frequency, voltage, overload, overcurrent,
unbalance alarms and reactive power import/export protections as follows:
Protection
Overvoltage
Undervoltage
Overfrequency
Underfrequency
Overload
Fast overcurrent
Current unbalance
Voltage asymmetry
Loss of excitation (reactive power import)
Overexcitation (reactive power export)
DEIF A/S
2. Description of option
C1 option
Option C1, Generator add-on protection package
ANSI no.
59
27
81
81
32
50/51
60
60
40
40
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