User’s Manual 35
The appar
ent power (the system’s total one) is displayed in kVA on the display
“MULTIFUNCTION”, if the function “BATTERY VOLTAGE (V) / APPARENT POWER (kVA)”
is selected. If less than 100 kVA it is displayed with a decimal, if over 1000 kVA it is displayed
in tens o
f kVA, by turning on the indicator “X10”. It is, by definition, always positive, therefore
there’s no problem for the display of its sign.
The energy meter managed by DST4600A counts the energy supplied by the generator set. It
has an internal resolution under 100 Wh but it is displayed in kWh. It is updated every second.
It is displayed alternatively to the powers by pressing “MODE / ACK” (this procedure is
indicated on the front panel of the board with the indication “POWER DISPLAY + MODE:
AC
TIVE ENERGY”). It uses the displays as follows:
Display “A”: kWh (indicated by “ACTIVE ENERGY (kWh)”)
Display “V”: MWh (indicated by “ACTIVE ENERGY (MWh)”)
Display “MULTIFUNCTION”: GWh (indicated by “ACTIVE ENERGY (GWh)”, only two
digits, the third one is
fix “E”)
If the energy counter exceeds 8 digits (100 GWh), it is saturated to 99.999.999 but is displayed
with the decimal point of the less significant digit turned on, to indicate the saturation condition.
The energy counter can be reset. The reset procedure is the following one:
By pressing the “F1” and “F2” select the “DATA – HOURS COUNT /
START
COUNTER”
function
Switch the key selector to OFF_RESET.
Press at the same time “MODE / ACK” and “START” for 5 seconds. After 5 seconds
the counters will be reset. The display does not indicate the reset in any way;
therefore the operator has to count the 5 seconds.
The procedure is similar to the other counter reset procedure. The only difference is in the
used pushbutton: “START” instead of “STOP”. Until the SW version 08.00.11 the energy meter
counter were cleared only together with the hour-counter and with the start-counter.
Be sure that all the TA share the same phase connected to ground and check for the correct
phase connection. Otherwise
the power measures will be wrong and it’ll possible that the
board will issue a reverse power alarm.
As a rule, connect terminal 50, 52 and 54 to ground and check that all the TA has the same
phase connected to the ground. Then, if the measured power factor is negative, reverse all
the TA connection.
Moreover, be sure that TA connections meet the generator phases connection (i.e. TA1 must
measures L1 current etc.). Otherwise the power measurement will be wrong.
There is no problem about phase rotation direction. The board will recognize if it is clockwise
or counter clockwise and will automatically set-up for correct power measurement.
