CIRCUTOR CDP-0 - Manual (Page 20)

CDP
20 Instruction Manual
𝑃
𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃
𝑃
𝑃𝑚𝑥𝑃𝑚
⋅ 100
Equation 2: Maximum modulation value.
2.-
If Injection Margin = 0%
The Grid power < ( 2 x 0.03 x Consumed power)
Equation 3: Condition 2 for load connection (Injection Margin = 0%).
If Injection Margin
≠ 0%
The Grid power < ( 2 x Injection Margin x Consumed power)
Equation 4
: Condition 2 for load connection (Injection Margin ≠ 0%).
As soon as conditions 1 and 2 are met, a new load will be added to the system
via the unit's auxiliary relays.
The loads will be disconnected, based on the maximum grid contribution. This
parameter is the ratio between the power supplied to the grid and the sum of the
powers of the loads managed by the system.
𝑃
Grid
∑ 𝑃
GC
· 100
Equation 5: Maximum grid contribution.
As soon as the value is greater than or equal to the value programmed by the
user, the last relay to be activated will be deactivated.
To ensure correct system stability, a minimum reclosing time (programmable by
the user) must pass between the activation and deactivation of two loads or a
single load.
The order in which loads are activated is another parameter that can be set by
the user. The order may be set as: connection by priority or rotating connection.
 Connection by priority: In this case the user sets the order in which
loads are to be activated.
 Rotating connection: Each connection cycle begins with a different load.
In other words, the first connection cycle begins by connecting load 1,
then 2 and finally 3. The following connection cycle will begin with the load
from relay 2, then 3 and finally 1, and so on and so forth.
The disconnection order for both modes is based on a LIFO system in which the
last load connected to the system will be the first load to be disconnected.