Protections
Page 135 of 188
057-254 ISSUE: 2
Fault
Description
Gen Loading Frequency
The module detected that the generator output frequency had not
risen above the Generator Loading Frequency setting after the
Warming Up timer had expired.
Gen Loading Voltage
The module detected that the generator output voltage had not risen
above the Generator Loading Voltage setting after the Warming Up
timer had expired.
Gen Over Current
IEEE C37.2 – 50 Instantaneous
Overcurrent Relay
IEEE C37.2 – 51 IDMT Overcurrent
Relay
NOTE: For more details, see section entitled Over Current
Alarm elsewhere in this document.
The module detected that the generator output current had risen
above the Generator Over Current Trip.
Gen Over Frequency
IEEE C37.2 – 81 Frequency Relay
The module detected that the generator output frequency had risen
above the Over Frequency Pre-Alarm Trip level for the configured
delay timer.
Gen Over Frequency Delayed
IEEE C37.2 – 81 Frequency Relay
The module detected that the generator output frequency had risen
above the Over Frequency Trip level but was below the Over
Frequency Overshoot Trip for the configured Overshoot Delay timer
during starting.
Gen Over Voltage
IEEE C37.2 – 59 AC Overvoltage
Relay
The module detected that the generator output voltage had risen
above the Over Voltage Pre-Alarm Trip level for the configured delay
timer.
Gen Reverse Power
IEEE C37.2 – 32 Directional Power
Relay
The module detected that the generator output kW had fallen below
the Reverse Power Trip for the configured delay timer.
Gen Short Circuit
IEEE C37.2 – 51 IDMT Short Circuit
Relay
NOTE: For more details, see section entitled Short Circuit
IDMT Alarm elsewhere in this document.
The module detected that the generator output current had risen
above the Short Circuit Trip for the duration of the IDMT function.
Gen Under Frequency
IEEE C37.2 – 81 Frequency Relay
The module detected that the generator output frequency had fallen
below the Under Frequency Pre-Alarm Trip level for the configured
delay timer after the Safety On Delay timer had expired.
Gen Under Voltage
IEEE C37.2 – 27 AC Undervoltage
Relay
The module detected that the generator output voltage had fallen
below the Under Voltage Pre-Alarm Trip level for the configured
delay timer after the Safety On Delay timer had expired.
HEST Active
The module received a fault condition from the engine ECU alerting
that the HEST had activated.
Inlet Temperature
The module detected that the engine’s ECU measurement of inlet
temperature had risen above the Inlet Temperature Pre-Alarm Trip
level.
Insufficient Capacity
The module’s governor output has reached its limit whilst attempting
to control the generator to produce more kWs whilst in parallel. This
indicates a fault with either the governor (including connection error),
setting of SW2, or that the engine has reached its maximum
capacity.
kW Overload
IEEE C37.2 – 32 Directional Power
Relay
The module detected that the generator output kW had risen above
the Overload Protection Trip for the configured delay timer
Loss Of Excitation
The module detected that the generator output kvar had fallen below
the Loss of Excitation Pre-Alarm Trip level.
Loss of Mag-PU
The module detected that the magnetic pick up was not producing a
pulse output after the required Crank Disconnect criteria had been
met.
Low Coolant Warning
The module detected that the engine coolant temperature had fallen
below the Low Coolant Temperature Pre-Alarm Trip level.
Continued over page…
Summary of Contents for 8610 MKII
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