JIAXING EASTRON ELECTRONIC INSTRUMENTS CO.,LTD.
TEL:0086-573-83698881
83698882
FAX: 0086-573-83698883
WEB:
www.eastrongroup.com
Email:
Add: No.1369. Chengnan Road, Nanhu, Jiaxing, Zhejiang, China 314001.
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1 Introduction
Introduction
Introduction
Introduction
This document provides operating, maintenance and installation instructions for the Eastron SDM630 din
rail mounted energy meter. The unit measures and displays the characteristics of single phase two wires and
three phase four wires supplies, including voltage, frequency, current, power and 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).
The SDM630 can be configured to work with a wide range of CTs, giving the unit a wide range of
operation. Built-in interfaces provide pulse and RS485 Modbus RTU outputs. Configuration is password
protected.
The unit can be powered from a separate auxiliary (AC or DC) supply. Alternatively it can be powered
from the monitored supply, where appropriate.
1.1
1.1
1.1
1.1 Unit
Unit
Unit
Unit Characteristics
Characteristics
Characteristics
Characteristics
The SDM630 can measure and display:
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Line voltage and THD% (total harmonic distortion) of all phases
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Line Frequency
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Currents, Current demands and current THD% of all phases
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Power, maximum power demand and power factor
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Active energy imported and exported
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Reactive energy imported and exported
The unit has password-protected set-up screens for:
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Changing password
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Supply system selection 1phase2wire, 3phase 4wires
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CT primary current (1 to 9999A)
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PT (1 to 500000V)
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Demand Interval time
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Reset for demand measurements
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Pulse output duration
A pulse output indicates real-time energy measurement. An RS485 output allows remote monitoring from
another display or a computer.
1.2
1.2
1.2
1.2 Current
Current
Current
Current Transformer
Transformer
Transformer
Transformer Primary
Primary
Primary
Primary Current
Current
Current
Current
The unit can be configured to operate with CT primary current of between 1 and 9999A. Maximum CT
primary current corresponds to a maximum input current to the unit of 5A.
1.3
1.3
1.3
1.3 RS485
RS485
RS485
RS485 Serial
Serial
Serial
Serial –
–
–
– Modbus
Modbus
Modbus
Modbus RTU
RTU
RTU
RTU
This uses an RS485 serial port with Modbus RTU protocol to provide a means of remotely monitoring and
