Multiple Voltage And Frequency; Single Phase Operation; External Control Of The Unit - Datakom D-500 MK2 User Manual

D-500 MK2 User Manual

34.8. MULTIPLE VOLTAGE AND FREQUENCY

The unit offers 3 sets of voltage and frequency protection limit values. The user is allowed to switch
between these 3 sets anytime.
This feature is especially useful in multiple voltage or frequency gensets for easy switching between
different operating conditions.
The switching to the second or third set of limit values can be done via digital input signal.
If switching is done with digital input signal, one of digital inputs has to be defined as "2
Select" using "INPUT FUNCTION SELECT"program group.
If third set is used, the one of digital inputs has to be defined as "3
FUNCTION SELECT"program group.
Below parameters are available for second voltage-frequency selection:
Nominal Voltage
Nominal Frequency
Nominal RPM
Genset Overcurrent Limit

34.9. SINGLE PHASE OPERATION

If the unit is used in a single phase electrical network, it is advised to select the topology as Single
Phase 2 Wires.
When the topology is set to Single Phase 2 Wires, then the unit will measure electrical parameters only
on phases L1 of genset and mains.
Voltage and overcurrent checks will be performed on phases L1 only.
Phases L2 and L3 parameters, as well as phase-to-phase voltages are removed from display screens.

34.10. EXTERNAL CONTROL OF THE UNIT

The unit offers total external control through programmable digital inputs. Any digital input may be
programmed for below functions:
- Force STOP mode
- Force AUTO mode
- Force TEST mode
- Disable Auto Start
- Force to Start
- Fault Reset
- Alarm Mute
- Panel Lock
External mode select signals have priority on mode buttons of the unit. If the mode is selected by external
signal, it is impossible to change this mode with front panel pushbuttons. However if the external mode select
signal is removed, the unit will revert to the last selected mode via pushbuttons.
It is also possible to lock the front panel completely for remote command.
rd
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Firmware V-6.3
nd
Volt-Freq
Volt-Freq Select" using "INPUT