ECU-C Installation/User Manual
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3.Hardware Installation
3.6 Current transformer interface
By installing Current Transformer(CT), the integrated meter in ECU-C can
measure the production&consumption power and energy. Please refer to
the picture.
It is mandatory to install the current transformer on production and
consumption side to get the anti-backflow function.
Anti-backflow function manages inverters one by one: it turns on/off each
inverter through zigbee communication,in order to get production inferior
or equal to consumption.
Notices of CT (Current Transformer) Installation
1. The position of the CTs: Clamp the CTs on production lines from PV
system and import/export lines from public grid.
2. The direction of CTs: The arrows on the CT should point from grid to PV
system and from grid to distribution box.
3. The wiring of the CTs: White wires connect to “+” Production CT ports on
ECU-C and black wires connect to “-” Grid CT ports on ECU-C.
4. CTs are as optional accessories provided, to ensure the CTs could match
APsystems ECU-C, please purchase CTs from APsystems or
APsystems
distributors.
5. 80A and 200A CTs are available.
Figure 13
