SAJ SMART METER-3 User Manual

SMART METER-3
User Manual
Chapter 1 - Introduction
1.1 Product Introduction
This user manual includes the installation and configuration
and other relevant information for the SMART METER-3.
The SMART METER-3 includes three phase Meter and three
current transformers (CTs). This set of devices can be
combined with solar inverters to implement the power limit
control function.
1.2 System Diagram
Grid
Solar Inverter
Load
DC
AC
~
L1
NL2
L3
S ET SEC
1 4 7 10
13 1416 17 19 21 24 25
3 6 9 10
Meter
Chapter 2 - Installation Instructions
2.1 Pre-Installation Checks
2.1.1 Checking the packaging
Although the SMART METER-3 has passed rigorous tests and
is checked before it leaves the factory, it is not excluded that it
may be damaged during transport. Please check whether the
packaging has shown obvious signs of damage and, if this
occurs, please do not open the package and contact your
dealer as soon as possible.
2.1.2 Checking accessories
Accessory items and number of items included can be found
in the label attached to the packaging. Please check and
contact your dealer if there are any missing accessories
2.2 Instructions for installing the SMART METER-3
2.2.1 Connection twisted-pair cable with RS-485 connector
Installer has to autonomously choose a twisted-pair cable,
extract Meter from the box and get the RS-485 connector
included with inverter. Connect an extremity of cable to
terminals 1 and 2 of RS-485 connector, then combine with
inverter through dedicated port.
3
Connect the other extremity of cable to terminals 24 and 25 of
Meter on relative slots according to scheme below:
2.2.2 Meter power connection and fixing
Connect the three phases to Ua, Ub and Uc inputs and the
neutral to Un input arranged on Meter. There are locking
hooks on the back of the Meter, through which it is possible to
fix the device on suitable sized guides (DIN 35mm). It is
RS-485
connector PIN
Meter slot
1
B (-)
2
A (+)
3
Metal-shielded wire
1
2

SAJ SMART METER-3 Specifications

General

Brand	SAJ
Model	SMART METER-3
Category	Measuring Instruments
Language	English

Summary

Introduction to SMART METER-3

Product Introduction

Overview of the SMART METER-3, its components like three-phase meter and CTs, and power limit control function.

System Diagram

Illustrates the system configuration with PV Array, Solar Inverter, Meter, Grid, and Load connections.

SMART METER-3 Installation Instructions

Pre-Installation Checks

Includes checking packaging for damage and verifying all accessories are present.

SMART METER-3 Installation Steps

Details on installing the meter, including RS-485 connection and power/fixing.

RS-485 Connector Pinout

Mapping of RS-485 connector pins to meter slots for data communication.

Twisted-Pair Cable Connection

Instructions for connecting the RS-485 twisted-pair cable to the meter and inverter.

Meter Power Connection and Fixing

Guidance on connecting power phases and securing the meter using DIN rail hooks.

Current Transformer (CT) Connection

Procedure for connecting CT outputs to the meter's current input terminals.

Inverter Configuration for Export Limitation

Steps to configure export limitation settings via the inverter's LCD display.

Verifying Meter Information

Meter Information Display

Details on how meter information like voltage, current, and power is displayed.