Operating instructions
multicomp
Version 1.00
Page 5 of 29
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Mounting and electrical connection of the device
3.1
General, very important!
•
Tighten all screws and connections as otherwise warranty will be void!
•
The device needs to be installed and operated in accordance with valid VDE regulations
(in particular VDE 0100) and energy supplier regulations.
Connection cross-sections and fuse protection table: see attachment
3.2
Current transformer connection and measurement voltage
If possible, mount the transformer in the phase that corresponds to L1 of the compensation facility
(determine by means of voltage measurement). All capacitor and consumer currents need to be
determined. In case of unbalanced phase load (small facilities), install the transformer in the phase with
the highest load.
- P1 (K) to energy supply (indicated on the transformer).
- P2 (L) to load
- S1 (k) with terminal k (controller terminal 20) and
- S2 (l) with terminal l (controller terminal 21) needs to be connected in the compensation facility
(use two-color cable!).
Line cross-section: up to 3 m = 1.5 mm², up to 6 m = 2.5 mm². For greater distances, we recommend
using a 1 A transformer. The controller is designed for the connection of 5 A and 1 A transformers,
switching is set in the configuration.
If using existing transformers, the current paths always need to be connected in series.
The secondary transformer current needs to be at least 12 mA. For smaller currents, no capacitors will
be connected (display shows “missing current“).
Measurement voltage connection according to connection chart.
3.3
Current transformer dimensions
The current transformer is dimensioned based on the current consumption of the consumers and not the
capacitor current. If other measuring devices are connected to a transformer in addition to the reactive power
controller, the transformer power needs to be dimensioned accordingly. Also, losses occur in the current
transformer line that need to be considered in case of large distances between the transformer and the
controller.
