PCE Health and Fitness PCE-ND10, User Manual

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Remaining types of the alarm:
H-on – always on;
H-off – always off.
example 1 of alarm setting:
Set n-on alarm type for monitored quantity P – 3-phase active
power,
Version: 5 A; 3 x 230/400 V. Setting the alarm on after exceeding
3800 W, switching the alarm off after power drops to 3100 W.
Calculations: rated 3-phase active power: P = 3 x 230 V x 5 A
= 3450 W
3450 W – 100 % 3450 W – 100 %
3800 W – A1on % 3100 W – A1of %
In conclusion: A1on = 110,0 % A1of = 90,0 %
Set: Monitored quantity: P; type of alarm: n-on, A1on 110,0,
A1of 90,0.
example no 2 of alarm setting:
The value of ordered power consumption may be used for
the purpose of prior warning that ordered power might be ex-
ceeded. Ordered power consumption is calculated according
to time period set for the mean active power synchronization
and value of the ordered power. Pre-emptive alarm should
be set so that it indicates the possibility of exceeding orde-
red power of 1MW at 90 % assuming allocation of 15-minutes
(900 s). Measuring current transformer 2500: 5A, voltage 230 V.
Peak max power consumption 1,5 MW.
Calculations:
PCE- ND10 meter active rated 3-phase power: P = 3 x k
u
x u
n
x
k
I
x I
n
= 3 x 1 x 230 V x 500 x 5A = 1,725 MW
g
100 %.
Ordered-to-rated power ratio = 1 MW / 1.725 ≈ MW
57,97
%
of meter rated value (rounded down) - Pord ;