Woodward EGCP-2 - Page 40

EGCP-2 Engine Generator Control Package Manual 26086
32 Woodward
Technician
Allows access to all setpoints except engine run time and calibration. And all
items allowed access by the Supervisor Security Code.
Factory
Allows access to engine run time and calibration settings (Full Access).
Sanity Checks
In order to prevent improper configuration that may damage the generator set
when started, the EGCP-2 runs through a series of “sanity checks”. The items
involved, all in the Configuration menu, for these “sanity checks” are:
1. Numbers of Poles
2. Number of Teeth
3. System Frequency
4. Rated Speed
5. Rated KW
6. Rated KVA
7. Rated KVAR
8. CT Ratio
9. PT Ratio
10. Voltage Input
11. Voltage Ref
The “sanity checks” are performed when in any Configuration menu and the
ENTER key is pushed. So as the items in the Configuration menu are entered,
sanity checks are performed.
• Items in the Configuration menu that fail the “sanity checks” will be indicated
by a pound sign (#). This pound sign will appear on the far right side of the
items value on the display screen. If any items have a pound sign, the
engine will not be allowed to start and all Alarm and Shutdown conditions
are ignored. These items must be changed to be within calculated values
(sanity checks) to allow engine, alarm, and shutdown operations.
• All items in the Configuration menu must be Committed before engine
operation will be allowed. Uncommitted items will have an asterisk (*) next
to items value on the display screen. Typically this step is done at the
factory. Asterisks will appear whenever a Setpoint file is downloaded to an
EGCP-2. To commit an item it must be ENTERed. Open the Configuration
menu and open each item, then ENTER that item. The asterisk will be gone.
The “sanity checks” are:
1. Calculate MPU frequency = Rated Speed * Number of Teeth / System
Frequency
• Answer: 500 ≤ calculated MPU frequency ≤ 8000 = Unit OK
2. Calculate System Frequency = Rated Speed * Number of Poles / 120
• Answer: should equal System Frequency’s configured value, 50 or 60
Hertz
3. Calculate Power Factor = Rated KW / Rated KVA
• Answer: 0.7 ≤ Calculated Power Factor ≤ 1 = Unit OK
4. Calculate CT Ratio, Voltage Input is DELTA
KVA * 1000 / Voltage Ref * 1.73
• Answer: If value is ≤ CT Ratio = Unit OK