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6.4
Generator (AC Voltage / Current / Frequency) Setup
The AC Frequency, AC Voltage, and AC Current menus allow the measurement and
display of the AC voltage, current, and frequency from the generator.
6.4.1
AC Frequency
In the AC Frequency menu, warnings and failures can be triggered for frequencies under
and/or over settable thresholds. The
DisconnectFreq
setting is used by the GSC400
controller as a backup to the speed input. If the speed input is not detected, the controller
checks the
DisconnectFreq
settings. If the measured frequency is greater than this
setting then the engine will be considered running.
6.4.2
AC Voltage
The user can enter under voltage, over voltage, and over current settings for four different
voltage configurations. This allows the GSC400 to be used on multiple generator types
without having to configure each GSC400 or it allows a single generator to support
multiple voltage configurations without having to go into the menu system. Each voltage
group supports a different generator configuration:
1.
Voltage Group 1 – Single Phase (two or three wire)
2.
Voltage Group 2 – Three Phase (Delta or Hi Wye)
3.
Voltage Group 3 – Three Phase Hi Wye (Hi Wye centre tapped)
4.
Voltage Group 4 – Three Phase (three or four wire delta)
Voltage Group 1
has an option (the
Group 1 Setting
under the AC Voltage menu) for
two wire (Hot and Neutral) or three wire (A, B, Neutral) single phase. If two wire single
phase is selected the GSC400 display is fixed to L-N.
Voltage Group 2
can be used for 3 wire delta and non-center-tapped Hi Wye
configurations.
Voltage Group 3
is the same as Voltage Group 2. There is a
Group 3
Setting
that can be enabled and is normally used for center tapped Hi Wye applications
where the voltage displayed on the controller is double the actual measured voltage.
Voltage Group 3 with the Group 3 Setting enabled is also useful in non-center-tapped Hi
Wye and 4-wire Delta applications where the user wishes to measure a voltage greater
than 600VAC – the maximum voltage the GSC400 supports. In this case the user can use
a 2:1 potential transformer (PT) to step down the voltage to the GSC400 and still have the
GSC400 display the correct voltage.
Voltage Group 4
has an option (the
Group 4 Setting
submenu under the AC Voltage
menu) for four wire delta or three phases (default). The two different configurations are
shown in Figure 10. The three wire delta requires three voltage transformers to create the
neutral reference. For four-wire delta, Phase B must be connected to the stinger (high
LEG).
Summary of Contents for GSC400 Series
Page 15: ...Figure 4 General GSC400 System Wiring Diagram ...
Page 16: ...Figure 5 Digital IO Example ...
Page 105: ...105 of 105 ...
