Connecting The Voltage Measurement Wires - Smappee Pro Installation Manual

Connecting the Voltage Measurement Wires

Overview!
Smappee measures the various voltages and phases of the individual Phase wires and
the Neutral wire of the electrical installation. These wires need to be connected to the
inputs of the green 8-pin connector block.
This section explains how to connect the measured wires to the respective inputs of the
connector block.
Separated Power Supply
Please be aware that the measurement lines are fully separated from the lines of the
power supply. Consequently, the power lines may be connected to circuits on a UPS or
on a DC source without impacting the measurements.
However, this also results in the need to connect all lines to the measurement inputs.
This is particularly true for the input Ln, which always needs to be connected to the
Neutral line.
Inputs for Phase and Neutral
There are four inputs:
Input Description
L1 - L3 Measurement inputs for the voltage and phase of each phase wire.
Ln Measurement input for the Neutral reference.
Note: To measure the Neutral reference correctly, always connect
the Input Ln explicitly to the Neutral wire. There is NO internal link
with the Neutral line of the main power supply.
Installation Variants
The wiring of the voltage measurement inputs on the green 8-pin connector block
depends on the type of electrical installation.
There are four different Installation Variants:
 Three-phase with Neutral ("Star")
 Single phase
US Split phase (180°)

Three-phase without Neutral ("Delta")

On the next page, you find detailed instructions for the wiring.
Smappee Pro Installation Manual
Version 1.6.1, 12-05-2017, rev 226
Page 9 of 32