Connecting the Voltage Supply greater than 63 A
Current transformers must be installed for a voltage supply > 63 A.
The following figure shows a connection example in TN and TT utility grids in the case of installation at the grid-connection point.
Additionally required material (not included in the scope of delivery):
3 x current transformer (recommendation: 5 A secondary current, accuracy class at least 1)
Connection cables for current transformers
Current transformer requirements:
The installation version of the current transformer (DIN rail or folding over, with or without connecting cable) can be freely selected, depending on the on-site conditions. Observe the following requirements during the selection:
Use a current transformer for 5 A secondary current with accuracy class 1 at least.
Select a current transformer type according to the grid connection. Example: type 100/5A for up to 100 A grid connection.
Procedure:
- Disconnect the connection point from voltage sources and make sure it cannot be reconnected.
- Connect one current transformer to each line conductor L1, L2 and L3.
- On each current transformer, connect 1 connection cable for secondary current measurement to terminals k/S1 and l/S2.
- Connect the connection cables for current measurement (dashed gray line) to the screw terminals L1, L2 and L3 of the Sunny Home Manager. To do this, open each screw terminal using a cross-head screwdriver, insert the conductor into the contact terminal and tighten the screw using a cross-head screwdriver (torque: 2.0 Nm).
- Connect the connection cables for voltage measurement (solid gray line) to the screw terminals L1, L2 and L3 at the output of the Sunny Home Manager. To do this, open each screw terminal using a cross-head screwdriver, insert the conductor into the contact terminal and tighten the screw using a cross-head screwdriver (torque: 2.0 Nm).
- Connect the connection cables for voltage measurement L1, L2 and L3 (solid gray line) to the corresponding line conductors L1, L2 and L3.