Novatek-electro OM-310, Руководство пользователя

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NOVATEK-ELECTRO
ОМ-310
t1F - time, during which the load relay will be open after de-energizing resulting from the watts input crossing
the main threshold
Figure 1.2 - OM-310 operation in the power limiting mode when

=0,

=1,

=3
1.2.5.3 Active power limiting during operation of a characterizing relay at

= 2 ( relay used for connecting ad-
ditional load)
After
ОМ
-310 energizing, after AR time (Att parameter) the load relay will close. After the delay, defined by
“

” or “

” parameter (whichever time is longer), the characterizing relay closes while connecting additional load.
If during operation the active power consumed by the load crosses the additional threshold (line 2 figure 1.3) for a
time period that is longer than assigned by “

” parameter, the characterizing relay will open.
Characterizing relay will re-close again:
а
) at

=0, after time, assigned by t2F parameter (instance of the characterizing relay closure - line “b” on
fig.1.3.);
b) at

=1, when load consumed power will reduce till the additional load power-on threshold (line 3 on
fig.1.3) (the characterizing relay engaging point - line “a” on fig.1.3.);
c) at

=2 depending on which event (a or b) comes first.
If during operation the active power consumed by the load crosses the additional threshold (line 1 figure 1.3) for
a time period that is longer than assigned by “

” parameter, the characterizing relay and the load relay will open.
The load relay and characterizing relay will be re-closed after AR period, or after time specified by

parame-
ter (whichever of the time periods is longer) (Figure 1.3).
Load consumed input wattage
Characterizing relay in the mode of controlling
additional load
Load relay
1 – main threshold (“

” parameter)
2 – additional de-energize threshold (“

” parameter)
3 – additional energize threshold (“

” parameter)
Figure 1.3 - OM-310 operation in the power limiting mode when

=2
The wattages values for the main threshold, the additional threshold, and the additional load energize threshold
depend on the “

” parameter value.
When

=0, the load consumed power is calculated for each phase separately and is compared with the thre-
sholds calculated as:
Main threshold (kW) = (“Pnn” * “P1F”) /(100*3), where
“Pnn” – cumulative rated load wattage, kW;
“P1F” – main threshold, %.
Additional threshold (kW) = (“Pnn” * “P2F”) /( “100”*3), where
“P2F” – additional threshold, %.
When

=1 the main threshold, the additional threshold and the energizing threshold are calculated similarly to
the way described under paragraph 1.2.5.2