Contrel EMS-D3 Compact power meter Owner's Manual
Contrel EMS-D3 Compact power meter is a DIN rail mounted device designed for accurate 3-phase electrical parameters monitoring. This includes current, voltage, power, power factor, frequency, and energy. It's ideal for installation monitoring, alarming, consumption tracking, energy evaluation, and identifying harmonic distortion. The meter features a backlit LCD display, true RMS measurements, and support for various current transformers (CTs). It also offers Modbus communication (optional) for integration into larger systems.
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INSTRUCTION MANUAL
IM1206-U v0.3
EMS-D3
DIN rail digital power meter
INSTRUCTION MANUAL
IM1206-U v0.3
EMS-D3
DIN rail digital power meter
pag. 2 / 16
WARNING!
• Carefully read the manual before the installation or use.
• This device is to be installed by qualified personnel, complying to current standards, to avoid damages.
• Before any maintenance operation on the device, remove supply inputs.
• The manufacturer cannot be held responsible for electrical safety in case of improper use of the equipment.
• Products illustrated herein are subject to alteration and changes without prior notice.
Introduction
The EMS-D3 series power meters are used to measure electrical parameters of an installation or a part of an installation.
This function meets the requirements for:
• installation monitoring,
• alarming on consumption drifts,
• consumption monitoring,
• evaluation of energy items (cost, accounting, and so on),
• identifying harmonic distortion.
Functions
The EMS-D3 series power meters provide accurate 3-phase electrical parameters monitoring. The product functions of power meters provide the various
measurement capabilities required to monitor an electrical installation such as current, voltage, power, power factor, frequency, and energy.
The key features are:
• Electrical parameters monitoring such as I, In, U, V, PQS, E, PF, Hz
• Power/current demand, peak demand
• Voltage and current harmonic distortion THD-V, THD-I
• Alarms
• Minimum/maximum/max demand values for many parameters
• Up to 2 digital outputs
• Modbus communication
Description
• Modular DIN-rail housing, 3U
• Backlight LCD display
• True RMS measurements
• Requires x/5A or x/1A current transformers or compact prewired split-core (TTA series)
• 4 keys for viewing and setting
• Continous sampling
• High accuracy
• 2 digital outputs
• Modbus RTU communication (optional)
Table of display pages
• INST = Instantaneous value – Present instantaneous value of reading, show by default every time the page is changed.
• MAX = Valore massimo istantaneo – Highest peak of the instantaneous value. The MAX values are stored and kept even when auxiliary power is removed.
They can be cleared using a dedicated command.
• AVG = Average value – Time-integrated value of reading. Allows to show measurements with slow variations.
• MD = Maximum demand – Maximum peak of the integrated value. Stored in non-volatile memory and it’s resettable with a dedicated command.
The power meter measures currents and voltages and reports real-time RMS values for all 3-phases and neutral. In addition, the power meter calculates power
factor, real power, reactive power, and more.
The following sections list the metering characteristics of the power meter.
PARAMETERS
Selection with ▲and ▼
1 PHASE-TO-PHASE VOLTAGES - V(L1-L2), V(L2-L3), V(L3-L1), V(SYS)
2 PHASE-TO-NEUTRAL VOLTAGES - V(L1-N), V(L2-N), V(L3-N), V(L-N)
3 PHASE AND NEUTRAL CURRENTS - I(L1), I(L2), I(L3), I(N)
4 POWER FACTOR - PF(L1), PF(L2), PF(L3), PF(SYS)
5 COS-PHI - COS-PHI(L1), COS-PHI L2), COS-PHI(L3), COS-PHI(SYS)
7 ACTIVE POWER - P(L1), P(L2), P(L3), P(SYS)
8 REACTIVE POWER - Q(L1), Q(L2), Q(L3), Q(SYS)
9 APPARENT POWER - S(L1), S(L2), S(L3), S(SYS)
10 VOLTAGE HARMONIC DISTORTION - THD-V(L1), THD-V(L2), THD-V(L3)
11 CURRENT HARMONIC DISTORTION - THD-I(L1), THD-I(L2), THD-I(L3)
12 FREQUENCY - F(SYS)
13 ENERGY METERS
kWh+(TOT), kWh-(TOT), kVArh+(TOT), kVArh-(TOT)
kWh+(L1), kWh-(L1), kVArh+(L1), kVArh-(L1)
kWh+(L2), kWh-(L2), kVArh+(L2), kVArh-(L2)
kWh+(L3), kWh-(L3), kVArh+(L3), kVArh-(L3)
WARNING!
• Carefully read the manual before the installation or use.
• This device is to be installed by qualified personnel, complying to current standards, to avoid damages.
• Before any maintenance operation on the device, remove supply inputs.
• The manufacturer cannot be held responsible for electrical safety in case of improper use of the equipment.
• Products illustrated herein are subject to alteration and changes without prior notice.
Introduction
The EMS-D3 series power meters are used to measure electrical parameters of an installation or a part of an installation.
This function meets the requirements for:
• installation monitoring,
• alarming on consumption drifts,
• consumption monitoring,
• evaluation of energy items (cost, accounting, and so on),
• identifying harmonic distortion.
Functions
The EMS-D3 series power meters provide accurate 3-phase electrical parameters monitoring. The product functions of power meters provide the various
measurement capabilities required to monitor an electrical installation such as current, voltage, power, power factor, frequency, and energy.
The key features are:
• Electrical parameters monitoring such as I, In, U, V, PQS, E, PF, Hz
• Power/current demand, peak demand
• Voltage and current harmonic distortion THD-V, THD-I
• Alarms
• Minimum/maximum/max demand values for many parameters
• Up to 2 digital outputs
• Modbus communication
Description
• Modular DIN-rail housing, 3U
• Backlight LCD display
• True RMS measurements
• Requires x/5A or x/1A current transformers or compact prewired split-core (TTA series)
• 4 keys for viewing and setting
• Continous sampling
• High accuracy
• 2 digital outputs
• Modbus RTU communication (optional)
Table of display pages
• INST = Instantaneous value – Present instantaneous value of reading, show by default every time the page is changed.
• MAX = Valore massimo istantaneo – Highest peak of the instantaneous value. The MAX values are stored and kept even when auxiliary power is removed.
They can be cleared using a dedicated command.
• AVG = Average value – Time-integrated value of reading. Allows to show measurements with slow variations.
• MD = Maximum demand – Maximum peak of the integrated value. Stored in non-volatile memory and it’s resettable with a dedicated command.
The power meter measures currents and voltages and reports real-time RMS values for all 3-phases and neutral. In addition, the power meter calculates power
factor, real power, reactive power, and more.
The following sections list the metering characteristics of the power meter.
PARAMETERS
Selection with ▲and ▼
1 PHASE-TO-PHASE VOLTAGES - V(L1-L2), V(L2-L3), V(L3-L1), V(SYS)
2 PHASE-TO-NEUTRAL VOLTAGES - V(L1-N), V(L2-N), V(L3-N), V(L-N)
3 PHASE AND NEUTRAL CURRENTS - I(L1), I(L2), I(L3), I(N)
4 POWER FACTOR - PF(L1), PF(L2), PF(L3), PF(SYS)
5 COS-PHI - COS-PHI(L1), COS-PHI L2), COS-PHI(L3), COS-PHI(SYS)
7 ACTIVE POWER - P(L1), P(L2), P(L3), P(SYS)
8 REACTIVE POWER - Q(L1), Q(L2), Q(L3), Q(SYS)
9 APPARENT POWER - S(L1), S(L2), S(L3), S(SYS)
10 VOLTAGE HARMONIC DISTORTION - THD-V(L1), THD-V(L2), THD-V(L3)
11 CURRENT HARMONIC DISTORTION - THD-I(L1), THD-I(L2), THD-I(L3)
12 FREQUENCY - F(SYS)
13 ENERGY METERS
kWh+(TOT), kWh-(TOT), kVArh+(TOT), kVArh-(TOT)
kWh+(L1), kWh-(L1), kVArh+(L1), kVArh-(L1)
kWh+(L2), kWh-(L2), kVArh+(L2), kVArh-(L2)
kWh+(L3), kWh-(L3), kVArh+(L3), kVArh-(L3)
pag. 3 / 16
Voltage measurements
- Direct measurement on the system or using voltage transformers. External voltage transformers are required to measure higher voltages than the permissible rated
input voltages.
- The device is designed for measuring input voltages up to 400 V to the neutral conductor and 690 V to the external conductor.
Current measurements
- Measuring current of 5A or 1A for connecting standard current transformers (CT) or compact prewired split-core (TTA series). CT primary and secondary
can be set.
Keyboard and LED functions
ESC key - Used to exit from settings menu or return to the previous menu sub-page.
▲and ▼keys - Used to scroll display pages, to select among possible choices and to modify settings (increment-decrement).
Key - Used to enter in settings menu (hold on at least 2 seconds).
ENTER key - Used to confirm a choice.
Display of readings
The ▲and ▼keys allow to scroll the pages viewed measurements one by one. The page being viewed is written in the title bar. For the pages that provide it,
the key allows to rotate through several sub-pages (for instance to show the highest peak for the selected readings).
The sub-page viewed is indicated:
MAX = Highest peak - Highest peak of the instantaneous value of the relative reading. The MAX values are stored and kept even when auxiliary power is removed.
They can be cleared using the dedicated command (see commands menu).
AVG = Average value - Time-integrated value of the reading. Allows showing measurements with slow variations. They can be cleared using the dedicated
command (see commands menu).
MD = Maximum demand - Maximum peak of the integrated value. Stored in a non-volatile memory and it is resettable with dedicated command.
Table of display sub-pages
Selection with ▲and ▼
PAGE
Selection with
SUB PAGES
1 PHASE-TO-PHASE VOLTAGES - V(L1-L2), V(L2-L3), V(L3-L1), V(SYS) - - -
2 PHASE-TO-CURRENT VOLTAGES - V(L1-N), V(L2-N), V(L3-N) MAX AVG
3 PHASE AND NEUTRAL CURRENTS - I(L1), I(L2), I(L3) MAX AVG MD
4 POWER FACTOR - PF(L1), PF(L2), PF(L3), PF(SYS) - - -
5 COS-PHI - COS-PHI(L1), COS-PHI L2), COS-PHI(L3), COS-PHI(SYS) - - -
7 ACTIVE POWER - P(SYS) MAX AVG MD
8 REACTIVE POWER - Q(SYS) MAX AVG MD
9 APPARENT POWER - S(SYS) MAX AVG MD
10 VOLTAGE HARMONIC DISTORTION - THD-V(L1), THD-V(L2), THD-V(L3) - - -
11 CURRENT HARMONIC DISTORTION - THD-I(L1), THD-I(L2), THD-I(L3) - - -
12 FREQUENCY - F(SYS) - - -
13 ENERGY METERS - kWh+(TOT), kWh-(TOT), kVArh+(TOT), kVArh-(TOT) L1, L2, L3 - -
LED Data traffic on
the RS-485 interface
LED ON: presence of
auxiliary voltage
LED DO1 engaged
or reactive energy
pulsing (kVARh)
Backlight
LCD display
LED DO2 engaged
or active energy
pulsing (kWh)
Voltage measurements
- Direct measurement on the system or using voltage transformers. External voltage transformers are required to measure higher voltages than the permissible rated
input voltages.
- The device is designed for measuring input voltages up to 400 V to the neutral conductor and 690 V to the external conductor.
Current measurements
- Measuring current of 5A or 1A for connecting standard current transformers (CT) or compact prewired split-core (TTA series). CT primary and secondary
can be set.
Keyboard and LED functions
ESC key - Used to exit from settings menu or return to the previous menu sub-page.
▲and ▼keys - Used to scroll display pages, to select among possible choices and to modify settings (increment-decrement).
Key - Used to enter in settings menu (hold on at least 2 seconds).
ENTER key - Used to confirm a choice.
Display of readings
The ▲and ▼keys allow to scroll the pages viewed measurements one by one. The page being viewed is written in the title bar. For the pages that provide it,
the key allows to rotate through several sub-pages (for instance to show the highest peak for the selected readings).
The sub-page viewed is indicated:
MAX = Highest peak - Highest peak of the instantaneous value of the relative reading. The MAX values are stored and kept even when auxiliary power is removed.
They can be cleared using the dedicated command (see commands menu).
AVG = Average value - Time-integrated value of the reading. Allows showing measurements with slow variations. They can be cleared using the dedicated
command (see commands menu).
MD = Maximum demand - Maximum peak of the integrated value. Stored in a non-volatile memory and it is resettable with dedicated command.
Table of display sub-pages
Selection with ▲and ▼
PAGE
Selection with
SUB PAGES
1 PHASE-TO-PHASE VOLTAGES - V(L1-L2), V(L2-L3), V(L3-L1), V(SYS) - - -
2 PHASE-TO-CURRENT VOLTAGES - V(L1-N), V(L2-N), V(L3-N) MAX AVG
3 PHASE AND NEUTRAL CURRENTS - I(L1), I(L2), I(L3) MAX AVG MD
4 POWER FACTOR - PF(L1), PF(L2), PF(L3), PF(SYS) - - -
5 COS-PHI - COS-PHI(L1), COS-PHI L2), COS-PHI(L3), COS-PHI(SYS) - - -
7 ACTIVE POWER - P(SYS) MAX AVG MD
8 REACTIVE POWER - Q(SYS) MAX AVG MD
9 APPARENT POWER - S(SYS) MAX AVG MD
10 VOLTAGE HARMONIC DISTORTION - THD-V(L1), THD-V(L2), THD-V(L3) - - -
11 CURRENT HARMONIC DISTORTION - THD-I(L1), THD-I(L2), THD-I(L3) - - -
12 FREQUENCY - F(SYS) - - -
13 ENERGY METERS - kWh+(TOT), kWh-(TOT), kVArh+(TOT), kVArh-(TOT) L1, L2, L3 - -
LED Data traffic on
the RS-485 interface
LED ON: presence of
auxiliary voltage
LED DO1 engaged
or reactive energy
pulsing (kVARh)
Backlight
LCD display
LED DO2 engaged
or active energy
pulsing (kWh)
pag. 4 / 16
1 – Title bar
2 – Unit of measure
3 – Measurement
4 – Phase indication
Example display readings
Display pages navigation
Indication of energy meters
2
4 3
1
1 – Title bar
2 – Unit of measure
3 – Measurement
4 – Phase indication
Example display readings
Display pages navigation
Indication of energy meters
2
4 3
1
5
6
7
8
9
10
11
12
13
14
15
16
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Key Features
- 3-phase monitoring
- Accurate measurements
- True RMS
- Backlit LCD
- Modbus communication
- Harmonic distortion analysis
- DIN rail mount
- Alarm functions
Related manuals
Frequently Answers and Questions
What are the different types of current transformers that can be used with the EMS-D3?
The EMS-D3 can be used with standard current transformers (CTs) or compact prewired split-core (TTA series) for measuring current.
How does the EMS-D3 measure energy?
The EMS-D3 calculates and stores total and partial energy values for active, reactive, and apparent energy. It can be set to measure import, export, or both.
What are the communication options for the EMS-D3?
The EMS-D3 supports a single RS-485 communication channel for Modbus communication (optional). This allows for data transfer to a master device.
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