17
Instruction Manual
CVM-C4
The impulse output ratio is set to 5000 imp /kWh, that is, when the device accumulates an en-
ergy of 1 kWh, 5000 impulses exit the impulse output.
We have to consider that in relation to this ratio the energy is calculated by the device, taking
into account the programmed voltage and current transformation ratios.
Thus, the actual energy can be calculated as:
í = ∗
1ℎ
5000
∗
∗
=
1
2
=
1
2
= ∗
1ℎ
5000
∗
∗
É é = ∗
1ℎ
5000
∗
∗
ℎ = ∗
1ℎ
5000
∗
∗
Where:
N: No. of impulses.
Rv: Voltage ratio, ratio between primary and secondary voltage.
í = ∗
1ℎ
5000
∗
∗
=
1
2
=
1
2
= ∗
1ℎ
5000
∗
∗
É é = ∗
1ℎ
5000
∗
∗
ℎ = ∗
1ℎ
5000
∗
∗
Rc: Current ratio, ratio between primary and secondary current.
í = ∗
1ℎ
5000
∗
∗
=
1
2
=
1
2
= ∗
1ℎ
5000
∗
∗
É é = ∗
1ℎ
5000
∗
∗
ℎ = ∗
1ℎ
5000
∗
∗
Note: The device calculates and displays the active and reactive energy, but the energy im-
pulse output is only active energy.
4.6.- DIGITAL INPUTS
The device has two digital inputs (terminals 70, 71 and 72 in Figure 13). The relay outputs can
be activated depending on the value of the digital inputs (see "6.3.- RELAY OUTPUT 1" and "6.4.-
RELAY OUTPUT 2").
If the energy accumulation mode programmed is 2t(“6.5.1.- ENERGY ACCUMULATION MODE”)
digital input 1,DI1, is used to change the tariff:
DI1 open: tariff 1.
DI1 closed: tariff 2.
72
70
+
-
+24V
Entradas Digitales
Digital inputs
COM
DI1
DI2
Figure 13: Digital inputs�
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