CARLO GAVAZZI Energy Meter User Manual

CARLO GAVAZZI Energy Meter

EM530/EM540 Energy Analyzer

The EM530/EM540 energy analyzer is a device used for analyzing three-phase and two-phase systems. The analyzer has both two and three-phase system options. The EM530 model is connected through 5A current transformers, while the EM540 model is for direct connection up to 65 A. Both models have a digital input and can be equipped, depending on the model, with a static output (pulse or alarm), a Modbus RTU communication port or an M-Bus communication port.

Product Usage Instructions

To use the EM530/EM540 Energy Analyzer, follow these steps:

Commissioning

1. Perform preliminary settings for the analyzer using the MID SETTINGS menu or QUICK SETUP menu.
2. Select the appropriate settings from the SETTINGS menu.
3. View information from the INFO menu.
4. Reset settings as necessary using the RESET menu.

Working with Measurement Pages

The analyzer has measurement pages displayed on the screen. To work with these pages:

1. Select the required measurement page from the home page.
2. Scroll through the page using the PAGE FILTER function if needed.

Input, Output, and Communication

The EM530/EM540 Energy Analyzer has a digital input, digital output (version O1), Modbus RTU port (version S1), and M-Bus port (version M1) options. To use these functionalities, follow the instructions provided in the manual.

Restoring Factory Settings

To restore factory settings:

1. Select the restore options from the RESET menu.
2. Restore the MID menu using the RESET menu if needed.

Tariff Management

The analyzer has a tariff management function available via digital input or Modbus RTU communication. Follow the instructions provided in the manual to use this functionality.

Maintenance and Disposal

The analyzer requires regular cleaning to avoid damage. For disposal, follow local regulations.

It is important to note that unauthorized opening of the analyzer is strictly prohibited and may lead to impaired protection. In case of malfunction or faults, contact the manufacturer’s technical service personnel.

This manual

Information property

Copyright © 2023, CARLO GAVAZZI Controls SpA
All rights reserved in all countries.
CARLO GAVAZZI Controls SpA reserves the right to apply modifications or make improvements to the relative documentation without the obligation of advance notice.

Safety messages

The following section describes the warnings related to user and device safety included in this document: NOTICE: indicates obligations that if not observed may lead to damage to the device.
CAUTION! Indicates a risky situation which, if not avoided, may cause data loss.
IMPORTANT: provides essential information on completing the task that should not be neglected.

General warnings

This manual is an integral part of the product and accompanies it for its entire working life. It should be consulted for all situations tied to configuration, use and maintenance. For this reason, it should always be accessible to operators.

NOTICE: no one is authorized to open the analyzer. This operation is reserved exclusively for CARLO GAVAZZI t echnical service personnel.
Protection may be impaired if the instrument is used in a manner not specified by the manufacturer.

Service and warranty
In the event of malfunction, fault, requests for information or to purchase accessory modules, contact the CARLO GAVAZZI branch or distributor in your country.
Installation and use of analyzers other than those indicated in the provided instructions void the warranty.

Introduction

EM530 is an energy analyzer connected through 5 A current transformers, for two- and three-phase systems up to 415 V L-L. EM540 is an energy analyzer for direct connection up to 65 A, for two- and three-phase systems up to 415 V L-L.
In addition to a digital input, the unit can be equipped, according to the model, with a static output (pulse or alarm), a Modbus RTU communication port or an M-Bus communication port.

Description

Available versions

Part number| Connection| Output| MID approval| cULus approval
---|---|---|---|---
EM530DINAV23XO1X| Via CT (5A secondary output)| Digital output|  | x
EM530DINAV23XS1X| Via CT (5A secondary output)| RS485 Modbus RTU|  | x
EM530DINAV23XM1X| Via CT (5A secondary output)| M-Bus|  | x
EM530DINAV23XO1PFA EM530DINAV23XO1PFB EM530DINAV23XO1PFC| Via CT (5A secondary output)| Digital output| x|
EM530DINAV23XS1PFA EM530DINAV23XS1PFB EM530DINAV23XS1PFC EM530DINAV23XS1PFA70 EM530DINAV23XS1PFB70 EM530DINAV23XS1PFC70| Via CT (5A secondary output)| RS485 Modbus RTU| x|
EM530DINAV23XM1PFA EM530DINAV23XM1PFB EM530DINAV23XM1PFC| Via CT (5A secondary output)| M-Bus| x|
Part number| Connection| Output| MID approval| cULus approval
---|---|---|---|---
EM540DINAV23XO1X| Direct connection up to 65 A| Digital output|  | x
EM540DINAV23XS1X| Direct connection up to 65 A| RS485 Modbus RTU|  | x
EM540DINAV23XM1X| Direct connection up to 65 A| M-Bus|  | x
EM540DINAV23XO1PFA EM540DINAV23XO1PFB EM540DINAV23XO1PFC| Direct connection up to 65 A| Digital output| x|
EM540DINAV23XS1PFA EM540DINAV23XS1PFB EM540DINAV23XS1PFC EM540DINAV23XS1PFA70 EM540DINAV23XS1PFB70 EM540DINAV23XS1PFC70| Direct connection up to 65 A| RS485 Modbus RTU| x|
EM540DINAV23XM1PFA EM540DINAV23XM1PFB EM540DINAV23XM1PFC| Direct connection up to 65 A| M-Bus| x|

PFA models
Easy connection function: irrespective of the current direction, the power always has a plus sign and contributes to increasing the positive energy meter. The negative energy meter is not available.

PFB models
For each measuring time interval, the individual phase energies with a plus sign are summed to increase the positive energy meter (kWh+), while the others increase the negative one (kWh-).

Example :
P L1= +2 kW, P L2= +2 kW, P L3= -3 kW
Integration time = 1 hour
kWh+ = (2+2) x1h = 4 kWh
kWh- = 3 x 1h= 3kWh

PFC models
For every measuring interval time, the energies of the single phases are summed; according to the sign of the result, the positive (kWh+) or negative totalizer (kWh-) is increased.
Example:
P L1= +2 kW, P L2= +2 kW, P L3= -3 kW
Integration time = 1 hour
kWh+=(+2+2-3)x1h=(+1)x1h=1 kWh
kWh+=0 kWh

UCS (Universal Configuration Software)

UCS is available in desktop and mobile versions.
It may connect to EM530 or EM540 via RS485 (RTU protocol, desktop version only). UCS allows to:

• set up the unit (online or offline);
• display the system state for diagnostic and setup verification purposes

Overview of the UCS functions:

• Setting up the system with energy meter connected (online setup)
• Defining the setup with energy non connected, then applying it later (offline setup)
• Displaying the main measurements
• Displaying the state of inputs and outputs
• Displaying the state of the alarms
• Recording the measurements of selected variables
• Check connection and correct wiring errors

Use

Interface

Introduction

EM530/EM540 is organized into two menus:

• Measurement pages: pages allowing to display the energy meters and the other electrical variables
• Main menu, divided into three sub-menus:
  • » SETTINGS: pages allowing to set the parameters
  • » INFO: pages displaying general information and the set parameters
  • » RESET: pages allowing to reset the partial counters and the dmd calculation, or to restore the factory settings

SETTINGS menu display

INFO menu display
RESET menu display

Measurement page display

Information and warnings

Working with EM530/EM540

Working with the measurement pages
Working with the SETTINGS menu
Working with the INFO menu
Working with the RESET menu

Commissioning

Preliminary settings

At switch-on, the device displays two preliminary setting menus:

• MID SETTINGS, for EM530, MID models only
• QUICK SETUP

MID SETTINGS menu

This procedure, only available in MID models, allows programming the current transformer ratio (CT ratio).

QUICK SETUP menu

This procedure is available when the instrument is switched on for the first time.
Note: the available parameters depend on the model. In the “QUICK SETUP?” starting page

on

Menu description

Measurement pages

The displayed pages depend on the selected system.

kW

| Imported active energy (TOTAL) System active power
2| kWh- TOT

kW

| Exported active energy (TOTAL) System active power

3

| kWh+ TOT kWh+ PAR

kW

| Imported active energy (TOTAL) Imported active energy (PARTIAL) System active power

4

| kWh+ TOT

kW PF

| Imported active energy (TOTAL) System active power

System power factor

5

| VLN VLL

Hz

| System line-line voltage System line-neutral voltage Frequency

6

| kWh+ TOT

kW

kW sys DMD P

| Imported active energy (TOTAL) System active power

Peak demand System active power

7| kvarh TOT kvar| Imported reactive energy (TOTAL) System reactive power
8| kvarh- TOT kvar| Exported reactive energy (TOTAL) System reactive power

9

| kVAh TOT

kW kVA

| Apparent energy (TOTAL) System active power System apparent power

10

| kWh TOT h TOT

kW

| Imported active energy (TOTAL) Run hour meter (kWh+) TOTAL System active power

11

| kWh- TOT h- TOT

kW

| Exported active energy (TOTAL) Run hour meter (kWh-) TOTAL System active power

12

| kWh PAR h PAR

kW

| Imported active energy (PARTIAL) Run hour meter (kWh+) PARTIAL System active power

13

| kWh- PAR h- PAR

kW

| Imported active energy (PARTIAL) Run hour meter (kWh-) PARTIAL System active power

14

| kWh+ TOT

kWh T1 kW

| Imported active energy (TOTAL) Imported active energy tariff 1 System active power

15

| kWh+ TOT

kWh T2 kW

| Imported active energy (TOTAL) Imported active energy tariff 2 System active power

16

| Thd Ln| THD of phase 1 voltage THD of phase 2 voltage THD of phase 3 voltage

17

| Thd LL| THD of phase 1-phase2 voltage THD of phase2-phase3 voltage THD of phase3-phase1 voltage

18

| Thd A| THD of phase 1 current THD of phase 2 current THD of phase 3 current
19| nEutrAL CurrEnt| Neutral current
Page| Displayed measurements| Description
---|---|---

20

| L1 kVA L2 kVA L3 kVA| Phase 1 apparent power Phase 2 apparent power Phase 3 apparent power

21

| L1 kvar L2 kvar L3 kvar| Phase 1 reactive power Phase 2 reactive power Phase 3 reactive power

22

| L1 PF L2 PF L3 PF| Phase 1 power factor Phase 2 power factor Phase 3 power factor

23

| L1-N V L2-N V L3-N V| Phase 1 voltage

Phase 2 voltage

Phase 3 voltage

24

| L1-2 V L2-3 V L3-1 V| Phase 1-phase 2 voltage Phase 2-phase 3 voltage Phase 3-phase 1 voltage

25

| L1 A L2 A L3 A| Phase 1 current

Phase 2 current

Phase 3 current

26

| L1 kW L2 kW L3 kW| Phase 1 active power Phase 2 active power Phase 3 active power

27

| L1 kWh TOT L2 kWh TOT L3 kWh TOT| Active energy phase 1 Active energy phase 2 Active energy phase 3

SETTINGS menu

This menu allows to set the parameters.

Page title| Sub-menu| Description| Values| Default values| Note
---|---|---|---|---|---
SYSTEM| –| System| 3P+N

3P

2P

| 3P+N|
CT RAT| –| (CT) current transformer ratio| 1 to 2000| 1| Non-MID,

AV5 models only

MEASurE| –| Measurement mode| A B C| A| Non-MID

models only

dMd int| –| DMD interval| 1 min

5 min

10 min

15 min

20 min

30 min

60 min

| 15 min|
inPut| Function| Digital input function| Tariff: tariff management

Status: remote status P reset: partial meters

reset

P StArt: partial meter

start/stop

| Status|
RS485| AddrESS| Address| 1 to 247| 1| S1 models only
PArity| Parity| NO/EVEN| no
bAudrAtE| Baudrate| 9.6 kbps

19.2 kbps

38.4 kbps

57.6 kbps

115.2 kbps

| 9.6 kbps
StoP bit| Stop bit| 1 or 2| 1
Page title| Sub-menu| Description| Values| Default values| Note
---|---|---|---|---|---
M bus| Pri Add| Primary address| 1 to 250| 0| M1 models only
bAudrAtE| Baudrate| 0.3 kbps

2.4 kbps

9.6 kbps

| 2.4 kbps
Output| Function| Function| Off

PuLSE (kWh+): pulse

output

linked to kWh+ PuLSE (kWh-): pulse output

linked to kWh-

ALArM: linked to alarm

status

| PuLSE (kWh+)| O1 models only
durAtion| Pulse duration| 30 ms

100 m

| 30 ms
PuLSES| Pulse weight (pulses/kWh)| 0.1/1/10/100/500/1000| 1000
StAtuS| Output status| No (normally open) Nc (normally closed)|
ALARM| EnAbLE| Enable| YES/no| no|
VAriAbLE| Monitored variable| kW A

V L-N V L-L PF

Kvar kVA

| kW|
SEt 1| Activation threshold| -15000 to 15000| 0.00|
Set 2| Deactivation threshold| -15000 to 15000| 0.00|
dELAY| Activation delay| 0 to 3600 s| 0|
dISPLAY| LiGHt| Timer for backlight switch-off| On: always on 1 min

2 min

5 min

10 min

15 min

30 min

60 min

oFF: always off

| On|
SC SAVEr| Screensaver enabling, see “Screensaver” on page 22| oFF

SLidE: slideshow home: homepage

| home| Non-MID

models only

HOME| homepage| 1 to 27| 1| Non-MID

models only

PAGES| Measurement page filter enabling, see “Page filter” on page 22| ALL

FiLtEr

| OFF|
WirinG| Wiring check enabling| on/OFF| on|
PASS|  | Password enabling for the SETTINGS and RESET menu| 0 (not protected) to 9999| 0 (NOT PROTECTED)|
End| –| Exit| –| –|

INFO menu

This menu allows to display the set parameters.

AddrESS

| Address| S1 versions only
11| rS485

bAudrAtE

| Baudrate (kbps)| S1 versions only
12| rS485

PArity

| Parity| S1 versions only
13| rS485

StoP bit

| Stop bit| S1 versions only
14| M buS PriM Add| M-Bus primary address| M1 versions only
15| M bus bAudrAte| M-Bus baudrate| M1 versions only
16| M bus SEC Add| M-Bus secondary address| M1 versions only
17| output Function| Digital output function| O1 versions only
18| Output StAtuS| Current output status| O1 versions only
19| output duration| Pulse output duration| O1 versions only
20| Output PuLSE| Output pulse weight| O1 versions only
21| ALArM

EnAbLe

| Alarm enabling|
22| ALArM

VAriAbLE

| Linked variable|
23| ALArM SEt 1| Alarm activation set point|
24| ALArM SEt 2| Alarm deactivation set point|
25| ALArM dELAY| Alarm activation delay|
26| display LIGHt| Backlight timer|
27| display SC SAVEr| Screensaver type|
28| display home| Home page|
29| display PAGES| Page filter enabling|
30| display WirinG| Wiring check enabling|
31| tAriFF| Tariff management|
32| CHECKSuM| Firmware checksum|
33| WiRinG| Wiring check code to correct errors|
Page| Page title| Description| Notes
---|---|---|---
34| terminal| Screw terminal phase assignment (press enter to see)|
35| On time| Total working time|
36| End| Exit|

RESET menu

This menu allows to reset the following settings:

models, all parameters are restored except the CT ratio.

6

|

MID ReS

| In MID models, it resets the CT ratio settings re-enabling first programming menu. This option is available only if the value of the total active energy is below 1 kWh.
7| End| Exit

Input, output and communication

Digital input
The digital input can perform four functions:

–
Digital input status| Register 300h
Open| 0
Closed| 1
Partial meters start/stop| Digital input is used to enable/disable the reset of partial meters| –
Digital input status| Partial meter
Open| Disabled (in pause)
Closed| Enabled
Partial meter reset| Digital input is used to enable/disable the increasing of partial meters| –
Digital input status| Action
Open| No action
Closed| After 3 seconds, reset partial meters

Digital output (version O1)
The digital output can perform two functions:

l  Pulse weight

l  Pulse duration

Modbus RTU port (version S1)
Modbus RTU communication port is used to transmit data to a Modbus master (Carlo Gavazzi UWP3.0 or any SCADA, PLC, BMS, etc).
For further information about Modbus RTU communication refer to the communication protocol.

M-Bus port (version M1)
M-Bus communication port is used to transmit data to a M-Bus master (Carlo Gavazzi SIU-MBM or any third party M-Bus master). For further information about M-Bus communication refer to the communication protocol.

Essential information

Alarms

Introduction

EM500 manages a measured variable alarm. To set the alarm, define:

• the variable to be monitored (VARIABLE)
• alarm activation threshold value (SET POINT 1)
• alarm deactivation threshold value (SET POINT 2)
• alarm activation delay (ACTIVATION DELAY)

Variables

The unit can monitor one of the following variables:

• system active power
• system apparent power
• system reactive power
• system power factor
• phase-neutral voltage (OR logic)
• phase-phase voltage (OR logic)
• current (OR logic)

Note: if you select a current or a voltage, the analyzer simultaneously monitors all the phases available in the set measurement system and triggers the alarm when at least one of the phases is in alarm (OR logic)

Alarm types

Up alarm (Set point 1 ≥ Set point 2)
The alarm activates when the monitored variable exceeds the Set 1 value for a time equal to the activation delay (Delay) and deactivates when the values drops below Set 2.

Down alarm (Setpoint 1 < Setpoint 2)
The alarm activates when the monitored variable drops below the Set 1 value for a time equal to the activation delay (Delay) and deactivates when it exceeds Set 2.

DMD values

Average value calculation (dmd)
EM530/EM540 calculates the average values of the electrical variables within a set integration interval (15 min by default).

Integration interval
The integration interval starts at switch-on or when the reset command is issued. The first value is displayed at the end of the first integration interval.

Example
The following is a sample integration:

• reset at 10:13:07
• set integration time: 15 min.
  The first value displayed at 10:28:07 refers to the interval from 10:13:07 to 10:28:07.

LCD display

Home page

The unit may display the default measurement pages after no operation has been performed for five minutes if the screensaver is enabled and the screensaver type is as “Home page” (default value).

Notes: if you select a page that is not available in the set system, the unit displays as its home page the first available page. In MID models the home page cannot be changed and displays the active energy meter.

Backlight

EM530/EM540 is equipped with a backlight system. You can set whether the backlight shall always be ON or whether it should automatically switch off after a given interval has elapsed since a button was pressed (1 to 60 minutes).

Screensaver

If the SCREENSAVER function is enabled (default setting), after 5 minutes have elapsed since a button was pressed the unit will display the home page if the screensaver type is “Home page” (default setting), or it shall activate the slideshow function, which displays the selected pages on a rotating basis.
Notes: In MID models the screensaver setting is “Homepage” and cannot be changed.

Page filter

The page filter makes it easier to use and browse the measurement pages. When you use the buttons, the unit shall only display the pages you are most interested in, which can be selected through the UCS software (S1 version) or is pre-defined (O1 and M1 version)

Note: to display all the pages without using the UCS software, you can disable the page filter from the SETTINGS MENU
(DISPLAY → PAGES→ ALL). By default, the pages included in the filter are: 1 (kWh+ TOT, kW), 2 (kWh- TOT, kW), 5 (VLN, VLL, Hz), 7 (kvarh+ TOT, kvar), 8 (kvarh- TOT, kvar), 25 (L1 A, L2 A, L3 A), see “Measurement pages” on page 14.

Restoring the factory settings

Restoring the settings using the RESET menu

From the RESET menu you can restore all the factory settings. At start-up the QUICK SET-UP menu shall be available again.
Notes: meters are not reset. In MID models you cannot reset the CT current transformer ratio (CT RATIO).

Restoring the MID menu using the RESET menu

To change the set CT ratio and restore the MID settings menu shown at first power on EM530 MID models, enter the reset menu and confirm “MID res”.

Note : in MID models the reset can only be performed if the energy meter has not exceeded 1 kWh. In case of wrong settings, you can then correct any CT current transformer setting errors (CT ratio), reactivating the MID programming menu.
Notes : if active energy has exceeded 1 kWh, the CT ratio cannot be changed.

WIRING CHECK function

Introduction

The WIRING CHECK function allows to check and correct the connections. For it to work properly, the following three conditions must be met:

1. the set system must be “3P+N”,
2. all voltages must be connected,
3. All currents must be greater than zero, with an offset ranging between a 45° lag and a 15° lead (power factor > 0.7 inductive or > 0.96 capacitive)

Display check

During operation, if a wiring error is detected the alarm icon will light up.
If the three conditions fail to be met, the following indications shall be displayed in the WIRING info page:

• V MISSING: at least one voltage is missing
• I MISSING: at least one current is missing
• PF OUT OF RANGE: the current-voltage offset is out of range.

Check from UCS software

By connecting to the analyzer through the UCS software or UCS Mobile, you can verify the connections and perform the steps required to correct the wiring error.

Virtual correction from UCS software or UCS Mobile

The virtual correction function allows to calculate the wiring error solution and to modify the association of the physical connections with the measurement references.

Example
if the connections of terminals 5 and 6 are inverted (voltage 2 and voltage 3), by accepting the proposed solution, voltage 2 shall be the one measured with reference to terminal 6, while voltage 3 shall be the one referring to terminal 5.

The unit shall display the icon, signalling that the association was modified via software and referring to the info pages to check the phase-terminal associations set by UCS. Note: the function is not available in MID models

Tariff management

Tariff management via digital input

To manage tariffs using the digital input set the function of the digital input as tariff (via keypad or UCS software). The current tariff depends on the status of the input

Tariff management Modbus RTU

To manage tariffs using the Modbus RTU command enable tariff management via Modbus command from UCS software

Maintenance and disposal

Troubleshooting
Note: in case of other malfunctions or of any failure, please contact the CARLO GAVAZZI branch or the distributor for your country

not used within the prescribed measuring range; as a consequence, the measurement exceeds the maximum permitted value or is the result of a calculation with at least one measurement in error.| Uninstall the analyser
The analyser has just been switched on and the interval defined for the calculation of the average power values (default: 15 min) has not expired yet.| Wait. If you wish to change the interval, access the Dmd page of the Settings menu
The displayed values are not the expected ones| Electrical connections are incorrect| Verify the connections
The current transformer settings are incorrect| Check the set current transformer ratio

Alarms

An alarm is triggered, but the measurement has not exceeded the threshold value| The value with which the alarm variable is calculated is in error| Check the set current transformer parameters
The alarm is not activated and deactivated as expected| The alarm settings are incorrect| Check the set parameters

Communication problems

The settings of the communication device (third-party PLC or software) are incorrect| Check the communication with the UCS software

Display problem

the filter, see “Page filter” on page 22

Download

This manual| https://www.gavazziautomation.com/images/PIM/MANUALS/ENG/EM500_IM_USE_ENG.pdf
---|---
EM530 installation manual| https://gavazziautomation.com/images/PIM/MANUALS/ENG/EM530_IM_INST.pdf
EM530 datasheet| https://gavazziautomation.com/images/PIM/DATASHEET/ENG/EM530_DS_ENG.pdf
EM540 installation manual| https://gavazziautomation.com/images/PIM/MANUALS/ENG/EM540_IM_INST.pdf
EM540 datasheet| https://gavazziautomation.com/images/PIM/DATASHEET/ENG/EM540_DS_ENG.pdf
UCS desktop| www.productselection.net/Download/UK/ucs.zip
UCS Mobile| Google Play Store

Cleaning
To keep the display clean, use a slightly wet cloth. Never use abrasives or solvents.

Responsibility for disposal
Dispose of the unit by separately collecting its materials and bringing them to the facilities specified by government authorities or by local public bodies. Proper disposal and recycling will help preventing potentially harmful consequences for the environment and for people.

via Safforze, 8
32100 Belluno (BL) Italy
www.gavazziautomation.com info@gavazzi- automation.com info: +39 0437 355811
fax: +39 0437 355880

References

• Automation.com - News & Resources for Industrial Automation

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