Kohler 12EFKOZD, Руководство по установке

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TP-7045 3/18c 64 Section 9 Paralleling Generator Sets
9.4.2 Faults Shown
Step Potential Cause Explanation Troubleshooting
Fault: System Voltage Mismatch Between Generators
1 System voltage is not
equivalent
One of the controllers on the network is
configured differently than the other
controllers. This will inhibit any of the
generators from closing to the bus.
Verify the system voltage of all the
generators match the requirements of the
site.
Fault: System Frequency Mismatch Between Generators
1 System frequency is not
equivalent
One of the controllers on the network is
configured differently than the other
controllers. This will inhibit any of the
generators from closing to the bus.
Verify the system frequency of all the
generators match the requirements of the
site.
Fault: Phase Connection Mismatch Between Generators
1 Phase connection is not
equivalent
One of the controllers on the network is
configured differently than the other
controllers. This will inhibit any of the
generators from closing to the bus.
Verify the phase connection of all the
generators match the requirements of the
site.
Fault: Live Bus Sensed When Dead Bus Expected
1 Bus is considered to be
live
The controller is measuring voltage on the
paralleling bus. This will inhibit the breaker
from closing.
Check bus for residual voltage (sometimes
induced by large transformers or motors).
Possibly, adjust the Dead Bus Threshold to
accommodate the residual voltage.
2 Bus sensing is not
connected
The controller may see voltage on the
paralleling bus when the generator is
operating and the bus sensing is
disconnected.
Verify the bus sensing wiring is connected
to the load side of the motor-operated
breaker for this generator.
Fault: Close Attempt
Fault: Fail to Close
1 Breaker is unable to
close
The controller is attempting to close the
circuit breaker but the breaker is not
closing.
Watch the ready flag on the motor operator
of the circuit breaker, if equipped. If it
indicates not ready when the engine is
stopped and toggles to the ready state
when the generator is trying to close the
breaker, the trip coil is acting correctly.
Continue at Step 5 otherwise, continue on
to Step 2.
2 Trip is not removed from
the circuit breaker
The controller is attempting to close the
circuit breaker but the breaker is not
closing because the trip coil is still
energized.
If the ready flag of the motor operator
indicates ready when the engine is
stopped, continue at Step 3 otherwise,
continue on to Step 4.
3 CB trip relay is wired as
normally open
The controller is expecting that the trip on
the circuit breaker is a normally-closed
contact. This is intentional as it holds a trip
on the breaker if the controller is removed.
Verify the CB trip relay is wired to hold a
trip on the breaker when the relay is not
energized.
4 Incorrect wiring between
the CB trip relay and the
trip coil on the breaker
The CB trip relay is operating correctly but
the trip coil on the breaker is remaining
energized. This could be due to incorrect
wiring between the generator controller and
the circuit breaker.
Verify the wiring to the circuit breaker.
5 Close is not applied to
the circuit breaker
The breaker trip is removed but the
controller is not able to close the breaker.
Verify the wiring between the generator
controller and the circuit breaker close coil.
Check the close coil to ensure that it is not
defective.
6 Breaker is not charged The breaker is receiving the signal to close
but the energizing spring is not charged.
Verify the motor operator is receiving
voltage at the appropriate contacts to allow
it to wind the spring.