Eastron SDM630MCT-2L - DIN Rail Smart Energy Meter For Single And Three Phase Electrical Systems Manual

Introduction

This document provides operating, maintenance and installation instructions. This unit measures and displays the characteristics of Single Phase Two Wire (1P2W) and 2 x (C1 & C2) Three Phase Four Wire (3P4W) networks. The measuring parameters include Voltage (V), Current (A), Frequency (Hz), Power (kW/KVA/KVAr), Power Factor (PF), Imported, Exported and Total Energy (kWh/kVArh). The unit also measures Maximum Demand Current and Power, this is measured over preset periods of up to 60 minutes.

This particular model accommodates 100mA Current Transformers and can be configured to work with a wide range of CTs. It also comes with a complete comms capability with built in RS485 Modbus RTU outputs, configuration is password protected.

This unit can be powered from a separate auxiliary supply (AC or DC). Alternatively, it can be powered from the monitored supply by linking the voltage reference and neutral reference in to terminals 5 & 6 (Please refer to wiring diagram).

Unit Characteristics

The SDM630MCT-2Lcan measure and display 2 x Three Phase circuits (C1 & C2):

• Phase to Neutral Voltage and THD% (Total Harmonic Distortion) of all Phases
• Line Frequency
• Current, Maximum Demand Current and Current THD% of all Phases
• Power, Maximum Power Demand and Power Factor
• Imported, Exported & Total Active Energy
• Imported, Exported & Total Reactive Energy

The unit has a Password-Protected set up menu for:

• Changing the Password
• System Configuration - 1P2W & 3P4W.
• Demand Interval Time
• Reset for Demand Measurements

Current Transformer Primary Current

This unit requires configuring to operate with the appropriate curren transformer(s), thesecondary current is 0.1A. It is programmed by inputting the ratio (CT Primary). It can be used on primary currents up to 6000A.

RS485 Serial – Modbus RTU

This unit is compatible with remote monitoring through RS485 Modbus RTU. Set-up screens are provided for configuring the RS485 port. Refers to the "Set backlight Display" section.

Start Up Screens

*After a short delay, the screen will display active energy measurements.

Measurements

The buttons operate as follows:

Switching Three Phase Circuit Display

Voltage and Current

Each successive press of the ESC button selects a new parameter:

Frequency and Power Factor and Demand

Each successive press of the button selects a new range:

Power

Each successive press of the button select a new range:

Energy Measurements

Each successive press of the button selects a new range:

Please note the register is 9999999.9 display over two lines.

Set Up

Set up Entry Methods

Some menu items, such as Password and CT, require a fourdigit number entry while others, such as supply system, require selection from a number of menu options.

Menu Option Selection

1. Use the and buttons to scroll through the different options of the set up menu.
2. Hold the button for 3 seconds to confirm your selection.
3. If an item flashes, then it can be adjusted by the and buttons.
4. Having selected an option from the current layer, hold the button for 3 seconds to confirm your selection.
5. Having completed a parameter setting, hold the button for 3 seconds to return to a higher menu level.
6. On completion of all setting-up, hold the button for 3 seconds, the measurement screen will then be restored.

Number Entry Procedure

When setting up the unit, some screens require the entering of a number. In particular, on entry to the setting up section, a password must be entered. Digits are set individually, from left to right. The procedure is as follows:

1. The current digit to be set flashes and then can be adjusted using the and buttons.
2. Press the button to more right to the next digit.
3. After setting the last digit, hold the button for 3 seconds to save your selection.

Communication

The RS485 port can be used for communication using Modbus RTU Protocol. To configure the Modbus settings, such as Address and Baud Rate, this is also done within the Password-protected set up menu.

RS485 Address

Use the and buttons to choose the necessary number, then press the button to move along to the next number. To save the new setting, hold the button for 3 seconds until the selection stops flashing.

Baud Rate

On completion of the entry procedure, hold the button to confirm the setting.

Parity

On completion of the entry procedure, hold the button for 3 seconds until the selection stops flashing.

Stop bits

On completion of the entry procedure, hold the button for 3 seconds until the selection stops flashing.

CT Configuration

This unit is CT Operated, the primary (CT1) and secondary (CT2) of the current transformer need to be programmed correctly for the meter to scale the inputs accordingly.

The CT Rate is the primary rate/ratio of the CT.
For Example: 200/100mA Current Transformers, so the CT Rate would be 0200 and the CT2 would be 0.1A.

PT

The PT option sets the Secondary Voltage (PT2 100-500V) of the Voltage Transformer (PT) that may be connected to the meter.

The PT Rate is the PT Primary divided by the PT Secondary. For Example: Voltage Transformer - 11000÷110=100, so the PT Rate would be 0100 and the PT2 would be 110.

DIT (Demand Integration Time)

This sets the period (in minutes) in which the Current and Power readings are integrated for maximum demand measurement. The options are off; 5; 10; 15; 30 or 60 minutes.

Hold the button for 3 seconds to exit the set up menu.

Set backlight Display

The meter provides a function to set how long you want the display screen back light to be active

Hold the button to confirm the setting and press to return to the main set up menu.

Supply System

The unit has a default setting of 3 Phase 4 Wire (3P4W).
Use this section to set the type of electrical system. button for 3 seconds to exit the set up menu.

Hold the button to confirm your adjustment. Hold the button for 3 seconds to exit the set up menu.

CLR

The meter provides a function to reset the maximum demand value of current and power.

Hold the button to confirm the setting and press to return to the main set up menu.

Change Password

Hold the button for 3 seconds to exit the set up menu.

P1 & P2 Reversal

If P1 is facing the load not the supply you need to reverse the flow direction though the "Set System Continued" menu:

Hold the button for 3 seconds to exit the set up menu

System Phase Sequence

The system sequence option sets the phase sequence with the voltage V1,V2 & V3 of the meter

Specifications

Measured Parameters

The unit can monitor and display the following parameters of a Single Phase Two Wire (1P2W) or Three Phase Four Wire (3P4W) system.

Voltage and Current

• Phase to Neutral Voltages 100-289V AC
  (not for 3P3W supplies).
• Phase to Phase Voltages 173-500V AC
  (3 Phase supplies only).
• Percentage Total Voltage Harmonic Distortion (V %THD) for each Phase to Neutral (not for 3P3W supplies).
• Percentage Total Voltage Harmonic Distortion (V% THD) between Phases (3 Phase supplies only).
• Current %THD for each Phase.

Power factor and Frequency and Max. Demand

• Frequency in Hz• Instantaneous power:
• Power 0-3600 MW
• Reactive power 0-3600 MVAr
• Volt-amps 0-3600 MVA
• Maximum Demand Power since last reset
• Power factor
• Maximum Neutral Demand Current, since the last reset (for Three Phase supplies only)

Energy Measurements

Imported/Exported active energy	0 to 9999999.9 kWh
Imported/Exported reactive energy	0 to 9999999.9 kVArh
Total active energy	0 to 9999999.9 kWh
Total reactive energy	0 to 9999999.9 kVArh

Measured Inputs

Voltage inputs through 4-way fixed connector with 2.5mm² stranded wire capacity. Single Phase Two Wire (1P2W)OR Three Phase Four Wire (3P4W) unbalanced. Line frequency measured from L1 Voltage or L3 Voltage. Three current inputs (six physical terminals) with 2.5mm² stranded wire capacity for connection of external CTs. Nominal rated input current 0.1A AC RMS.

Accuracy

Voltage	0·5% of range maximum
Current	0·5% of nominal
Frequency	0·2% of mid-frequency
Power factor	1% of unity (0.01)
Active power (W)	±1% of range maximum
Reactive power (VAr)	±1% of range maximum
Apparent power (VA)	±1% of range maximum
Active energy (Wh)	Class 1 IEC 62053-21
Reactive energy (VARh)	±1% of range maximum
Total harmonic distortion	1% up to 31st harmonic
Response time to step input	1s, typical, to >99% of final reading, at 50 Hz.

Auxiliary Supply

This unit does not require a separate auxiliary supply; the unit is self supplied it draws the necessary power from the voltage input connections. If a three phase supply is connected, and the phase that is powering the unit fails, it will change the phase supply to avoid shutting down.

Interfaces for External Monitoring

Three interfaces are provided:

• RS485 communication channel that can be programmed for Modbus RTU protocol

The Modbus configuration (baud rate etc.) and the pulse relay output assignments (kW/kVArh) are configured through the set-up screens.

RS485 Output for Modbus RTU

For Modbus RTU, the following RS485 communication parameters can be configured from the set-up menu:

Baud rate: 2400, 4800, 9600, 19200, 38400

Parity: none (default) / odd / even

Stop bits: 1 or 2

RS485 Network Address: 3 digit number - 001-247

Modbus^™ Word order Hi/Lo byte order is set automatically to normal or reverse. It cannot be configured from the set-up menu.

Reference Conditions of Influence Quantities

Influence Quantities are variables that affect measurement errors to a minor degree. Accuracy is verified under nominal value (within the specified tolerance) of these conditions.

Ambient temperature	23°C ±1°C
Input waveform	50 or 60Hz ±2%
Input waveform	Sinusoidal (distortion factor < 0·005)
Auxiliary supply voltage	Nominal ±1%
Auxiliary supply frequency	Nominal ±1%
Auxiliary supply waveform (if AC)	Sinusoidal (distortion factor < 0·05)
Magnetic field of external origin	Terrestrial flux

Environment

Operating temperature	-25°C to +55°C*
Storage temperature	-40°C to +70°C*
Relative humidity	0 to 95%, non-condensing
Altitude	Up to 3000m
Warm up time	1 minute
Vibration	10Hz to 50Hz, IEC 60068-2-6, 2g
Shock	30g in 3 planes

*Maximum operating and storage temperatures are in the context of typical daily and seasonal variation.

Mechanics

DIN rail dimensions	72 x 94.5 mm (WxH) per DIN 43880
Mounting	DIN rail (DIN 43880)
Sealing	IP51 indoor
Material	Self-extinguishing UL 94 V-0

Dimensions

Installation

Wiring Three Phase Four Wire

CT Orientation

With this meter the CT can be installed one of four ways depending in which way, will determine on the phase sequence of the meter

Option1 Default

Option 2

Requires phase sequence, change L3 to L1 and L1 to L3, please refer to the "System Phase Sequence" section.

Option 3

Requires flow reversal, please refer to the "P1 & P2 Reversal" section

Option 4

Requires phase sequence change L3 to L1 and L1 to L3 please refer to the "System Phase Sequence" section and CT reversal, please refer to the "P1 & P2 Reversal" section

Videos

Eastron Easy Click SDM630MCT-2L Video by Eastron Europe Ltd

Documents / Resources

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

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