
EASTRON SDM630M CT User Manual
Introduction
This document provides operating, maintenance and installation instructions. The unit measures
and displays the characteristics of single phase two wires (1p2w), 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 mbus 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, 3p3w,3p4w
Demand Interval time
Reset for demand measurements
Pulse output duration
Two pulse output indicates real-time energy measurement. An mbus 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
Mbus
This uses an MBus port with EN13753-3 protocol to provide a means of remotely monitoring and
controlling the Unit.
Set-up screens are provided for setting up the MBus port.