EASTRON SDM630MCT User Manual
Address: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China.
Tel: 0086-573-83698881/83698882 Fax: 0086-573-83698883 Web: www.eastron.com.cn
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Introduction
This document provides operating, maintenance and installation instructions. The unit measures
and displays the characteristics of single phase two wires (1p2w), Single phase(split-phase) three
wire(1p3w), three phase three wires(3p3w,) and three phase four wires(3p4w) supplies, including
voltage, frequency, current, power ,active and reactive energy, imported or exported. Energy is
measured in terms of kWh, kVArh. Maximum demand current can be measured over preset
periods of up to 60minutes. In order to measure energy, the unit requires voltage and current
inputs in addition to the supply required to power the product. The requisite current input(s) are
obtained via current transformers(CT).
This meter can be configured to work with a wide range of CTs, giving the unit a wide range of
operation. Built-in interfaces provides pulse and RS485 Modbus RTU outputs. Configuration is
password protected.
This unit can be powered from a separate auxiliary (AC or DC) supply. Alternatively it can be
powered from the monitored supply, where appropriate.
Unit Characteristics
The Unit can measure and display:
Line voltage and THD% (total harmonic distortion) of all phases
Line Frequency
Currents, Current demands and current THD% of all phases
Power, maximum power demand and power factor
Active energy imported and exported
Reactive energy imported and exported
The unit has password-protected set-up screens for:
Changing password
Supply system selection 1p2w, 1p3w,3p3w,3p4w
Demand Interval time
Reset for demand measurements
Pulse output duration
Two pulse output indicates real-time energy measurement. An RS485 output allows remote
monitoring from another display or a computer.
Current Transformer Primary Current
The unit can be configured to operate with CT ratio between primary current and secondary
current. The secondary CT has two options: 1A/5A
RS485 Serial
–
Modbus RTU
This uses an RS485 serial port with Modbus RTU protocol to provide a means of remotely
monitoring and controlling the Unit
Set-up screens are provided for setting up the RS485 port.
