Basler DGC-500, Инструкция по эксплуатации, Страница: 44 / 154

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D, Definite
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M, Moderately Inverse
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I1, Inverse
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I2, Inverse
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V1, Very Inverse
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V2, Very Inverse
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E1, Extremely Inverse
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E2, Extremely Inverse
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A, Standard Inverse
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B, Very Inverse
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C, Extremely Inverse
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G, Long Inverse
An overcurrent annunciation can be user-selected to trigger a pre-alarm (warning) or alarm (shutdown).
An overcurrent annunciation can also be user-configured to close one or both of the programmable
outputs.
When a Single-Phase Override contact input is received by the DGC-500, the overcurrent pickup setting
automatically switches from the three-phase overcurrent setting to the single-phase overcurrent setting.
Phase Imbalance (47)
When the difference between any of the three phases of generator voltage increases above the 47 pickup
setting for the duration of the 47 time delay, a phase imbalance condition is annunciated. The phase
imbalance pickup setting has a range of 5 to 100 Vac and the phase imbalance time delay setting has a
range of 0 to 30 seconds. A phase imbalance annunciation can be user-selected to trigger a pre-alarm
(warning) or alarm (shutdown). A phase imbalance annunciation can also be user-configured to close one
or both of the programmable outputs.
DISPLAY OPERATION
The DGC-500 has three standard display modes: Normal, Alternate, and Menu. The optional ECU
Parameters mode is present only on controllers with a style number of XXJX. Pressing the
Display
Toggle pushbutton scrolls through the active screen of each available display mode. Figure 3-2 illustrates
the top-level screen of the standard and optional display modes.
Figure 3-2. Display Mode Navigation
Normal Mode
Normal mode displays various engine and generator parameters. Each parameter is displayed adjacent
to the corresponding label on the front panel overlay.
Firmware Version
Normal mode also displays the firmware version of the DGC-500.
The DGC-500 firmware version is viewed in Normal mode by pressing and holding either the
Raise/Scroll pushbutton or Lower/Scroll pushbutton. Releasing either pushbutton returns the display to
the current Normal mode screen.
Alternate Mode
Press the Raise/Scroll or Lower/Scroll pushbuttons while viewing the top-level Alternate mode screen
(Figure 3-2) to scroll through the available engine and generator metering values. Figure 3-3 illustrates
the Alternate mode screens for a DGC-500 configured for three-phase, line-to-neutral operation. Units
configured for three-phase, line-to-line operation do not display the GEN A-N VOLTS, GEN B-N VOLTS,
and GEN C-N VOLTS screens. Units configured for single-phase, A-phase to B-phase operation do not
display the GEN B-C VOLTS, GEN C-A VOLTS, and GEN C-N VOLTS screens.
3-14 DGC-500 Functional Description 9355400990 Rev H