Kohler 12EFKOZD, Руководство по установке

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TP-7045 3/18c 67 Section 9 Paralleling Generator Sets
Step Potential Cause Explanation Troubleshooting
Fault: Bus Voltage Amplitude Mismatch--Phase A
1 The phase A voltage of
the bus does not match
the generator
The voltage measured on the bus sensing
for phase A does not match the voltage
measured on phase A of the generator.
Verify the bus sensing wire for phase A is
connected to phase A of the load side of
the paralleling breaker and there are no
breaks in the wire.
Fault: Bus Voltage Amplitude Mismatch--Phase B
1 The phase B voltage of
the bus does not match
the generator
The voltage measured on the bus sensing
for phase B does not match the voltage
measured on phase B of the generator.
Verify the bus sensing wire for phase B is
connected to phase B of the load side of
the paralleling breaker and there are no
breaks in the wire.
Fault: Bus Voltage Amplitude Mismatch--Phase C
1 The phase C voltage of
the bus does not match
the generator
The voltage measured on the bus sensing
for phase C does not match the voltage
measured on phase C of the generator.
Verify the bus sensing wire for phase C is
connected to phase C of the load side of
the paralleling breaker and there are no
breaks in the wire.
Fault: Bus Voltage Amplitude Mismatch
1 The bus metering is not
connected correctly
The bus metering is not connected to the
appropriate lugs of the load side of the
paralleling breaker (but there is some
voltage present).
Verify the bus sensing wire for all three
phases is connected to the appropriate
lugs on the load side of the paralleling
breaker and there are no breaks in any of
the wires.
2 The generator metering
is not connected
correctly
The generator metering is not connected to
the output of the generator.
Verify the generator metering is sensed at
the output of the generators. A common
mistake is to connect the metering to the
center tap voltages V7, V8, V9.
Fault: Phase Angle Mismatch
1 All of the bus sensing
wires are incorrectly
connected
The bus sensing wires must be connected
to phase A, phase B and phase C of the
bus. If any two connections are reversed,
the controller can detect the reversed
connections. This fault will only occur if all
three wires are incorrectly connected.
Verify the bus metering connections.
2 The phase connections
on the paralleling
breaker are inconsistent
with the generator
The power leads from the generator to the
paralleling circuit breaker must be
connected consistently. Phase A from the
generator must go to phase A of the line
side of the paralleling (motor operated)
breaker, phase B from the generator to
phase B of the breaker, and phase C of the
generator to phase C of the breaker.
Verify the output cable connections.
3 Generator sensing is
connected incorrectly
The controller measurement leads are not
connected to the appropriate output phases
or the phases are incorrectly labeled.
Verify sensing leads from the controller are
connected to the appropriate output leads
from the generator. L1 should connect to
phase A, L2 to phase B, L3 to phase C, L0
to neutral.
4 Breaker to bus wiring is
inconsistent
In applications where the bus sensing is
taken from a location other than the load
side of the paralleling breaker, it is possible
to connect the wiring incorrectly between
the load side of the output breaker and the
paralleling bus.
Verify cable connections from the
paralleling breaker to the paralleling bus.
Fault: Bus Frequency Mismatch
1 Abnormal condition Bus frequency is not similar to generator
frequency with breaker closed.
Verify bus metering is connected correctly.
Reset the controller.