Schneider Electric EM3555 User Manual

EM3555

Bi-Directional Compact Power and Energy Meter Installation Guide

ZL0093-0A 11/2011

EM3555

HAZARD CATEGORIES AND SPECIAL SYMBOLS

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11/2011

Read these instructions carefully and look at the equipment to become familiar with the device before trying to install, operate, service or maintain it. The following special messages may appear throughout this bulletin or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure.

The addition of either symbol to a “Danger” or “Warning” safety label indicates that an electrical hazard exists which will result in personal injury if the instructions are not followed.

This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

DANGER

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

WARNING indicates a potentially hazardous situation which, if not avoided, can result in death or serious injury.

PLEASE NOTE

FCC NOTICE

CAUTION

CAUTION indicates a potentially hazardous situation which, if not avoided, can result in minor or moderate injury.

CAUTION

CAUTION, used without the safety alert symbol, indicates a potentially hazardous situation which, if not avoided, can result in property damage.

NOTE: Provides additional information to clarify or simplify a procedure.

Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

This Class B digital apparatus complies with Canadian ICES-003.

ZL0093-0A 11/2011

EM3555

Contents

CONTENTS

Safety Precautions .............................................................................................. 1

Installation Overview ........................................................................................... 1

Specications ...................................................................................................... 2

Introduction ......................................................................................................... 4

Parts of the EM Series ........................................................................................ 4

Dimensions ......................................................................................................... 5

Data Output ........................................................................................................ 6

Installation ........................................................................................................... 7

Supported System Types .................................................................................... 8

Wiring .................................................................................................................. 9

Wiring Diagrams ............................................................................................... 10

Control Power ....................................................................................................11

Fuse Recommendations ....................................................................................11

Wiring Notes ......................................................................................................11

Display Screen Diagram ................................................................................... 12

Quick Setup Instructions ................................................................................... 13

Solid State Pulse Output ................................................................................... 14

User Interface Menu Abbreviations Dened ..................................................... 15

User Interface for Data Conguration ............................................................... 16

Alert/Reset Information ..................................................................................... 18

User Interface for Setup .................................................................................... 19

RS-485 Communications .................................................................................. 21

Data Logging .................................................................................................... 22

Standard Modbus Default Settings ................................................................... 23

Modbus Point Map ............................................................................................ 24

Troubleshooting ................................................................................................ 41

China RoHS Compliance Information ............................................................... 41

i

EM3555 Contents

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ii

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SAFETY PRECAUTIONS

INSTALLATION OVERVIEW

Safety Precautions

EM3555

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

• Follow safe electrical work practices. See NFPA 70E in the USA or

applicable local codes.

• This equipment must only be installed and serviced by qualied

electrical personnel.

• Read, understand, and follow the instructions before installing this

product.

• Turn off all power supplying equipment before working on or inside

the equipment.

• Always use a properly rated voltage sensing device to conrm power is

off.

• DO NOT DEPEND ON THIS PRODUCT FOR VOLTAGE INDICATION.

• Only install this product on insulated conductors.

• Install device in an appropriate electrical and re enclosure per local

regulations.

• ESD sensitive equipment. Ground yourself and discharge any static

charge before handling this device.

• Any covers that may be displaced during the installation must be

reinstalled before powering the unit.

• Do not install on the load side of a Variable Frequency Drive (VFD), aka

Variable Speed Drive (VSD) or Adjustable Frequency Drive (AFD).

Failure to follow these instructions will result in death or serious injury.

NOTE: Observe correct CT orientation.

A. DIN Rail Mounting

B. Screw Mounting

The meter can be mounted in two ways: on standard 35 mm DIN rail or screw-mounted to the interior surface of the enclosure.

1. Disconnect and lock out power. Use a properly rated voltage sensing device to confirm power is off.

2. Attach mounting clips to the underside of the housing by sliding them into the slots from the inside. The stopping pegs must face the housing, and the outside edge of the clip must be flush with the outside edge of the housing.

3. Snap the clips onto the DIN rail.

4. To prevent horizontal shifting across the DIN rail, use two end stop clips.

1. Disconnect and lock out power. Use a properly rated voltage sensing device to confirm power is off.

2. Attach the mounting clips to the underside of the housing by sliding them into the slots from the outside. The stopping pegs must face the housing, and the screw hole must be exposed on the outside of the housing.

3. Use three #8 screws (not supplied) to mount the meter to the inside of the enclosure.

NOTE: For detailed instructions, please see the “Installation” section later in this guide.

1

EM3555 Specifications

SPECIFICATIONS

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Table 1 Specifications

Type Description

Measurement Accuracy

Real Power and Energy IEC 62053-22 Class 0.5S, ANSI C12.20 0.5%

Reactive Power and Energy IEC 62053-23 Class 2, 2%

Current 0.4% (+0.015% per °C deviation from 25°C) from 5% to

Voltage 0.4% (+0.015% per °C deviation from 25°C) from 90 V

Sample Rate 2520 samples per second, no blind time

Data Update Rate 1 sec

Type of Measurement True RMS; One to three phase AC system

Input Voltage Characteristics

Measured AC Voltage Minimum 90 V

Metering Over-Range +20%

Impedance 2.5 MΩ

Frequency Range 45 to 65 Hz

Input Current Characteristics

CT Scaling Primary: Adjustable from 5 A to 32,000 A

Measurement Input Range 0 to 0.333 VAC or 0 to 1.0 VAC (+20% over-range)

Impedance 10.6 kΩ (1/3 V mode) or 32.1 kΩ (1 V mode)

Control Power

AC 5 VA max.; 90 V min.;

DC* 3 W max.; UL and CE: 125 to 300 VDC

Ride Through Time 100 msec at 120 VAC

Output

Alarm Contacts N.C., static output; (30 VAC/DC, 100 mA max. @ 25°C,

Real Energy Pulse Contacts N.O., static output; (30 VAC/DC, 100 mA max. @ 25°C,

RS-485 Port 2-wire, 1200 to 38400 baud, Modbus RTU

Mechanical Characteristics

Weight 0.62 lb (0.28 kg)

IP Degree of Protection (IEC

60529)

Display Characteristics Back-lit blue LCD

Terminal Block Screw Torque 3.5 in·lb (0.4 N·m) nominal/4.4 in·lb (0.5 N·m) max.

Terminal Block Wire Size 14 to 24 AWG

Rail T35 (35mm) DIN Rail per EN50022

100% of range;

0.8% (+0.015% per °C deviation from 25°C) from 1% to 5% of range

600 VAC

L-L

(156 V

UL Maximums: 600 V

L-N

CE Maximums: 300 V

/5 MΩ

L-N

UL Maximums: 600 V CE Maximums: 300 V

) for stated accuracy;

L-L

(347 V

L-L

(520 V

L-N

L-L

(347 V

L-L

(520 V

L-N

);

L-N

)

L-L

);

L-N

)

L-L

derate 0.56 mA per °C above 25°C)

IP40 front display; IP20 Meter

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to

L-N

2

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Specifications

Type Description

Environmental Conditions

Operating Temperature -30° to 70°C (-22° to 158°F)

Storage Temperature -40° to 85°C (-40° to 185°F)

Humidity Range <95% RH (non-condensing)

Altitude of Operation 3 km max.

Metering Category

US and Canada CAT III; for distribution systems up to 347 V

CE CAT III; for distribution systems up to 300 V

Dielectric Withstand Per UL 508, EN61010

Conducted and Radiated Emissions

Conducted and Radiated Immunity

FCC part 15 Class B, EN55011/EN61000 Class B; (residential and light industrial)

EN61000 Class A (heavy industrial)

Safety

US and Canada (cULus) UL508 (open type device)/CSA 22.2 No. 14-05

Europe (CE) EN61010-1:2001

* External DC current limiting is required, see fuse recommendations.

/600 VAC

L-N

/480 VAC

L-N

EM3555

L-L

For use in a Pollution Degree 2 or better environment only. A Pollution Degree 2 environment must control conductive pollution and the possibility of condensation or high humidity. Consideration must be given to the enclosure, the correct use of ventilation, thermal properties of the equipment and the relationship with the environment.

Always use this product in the manner specied or the protection provided by

the product may be impaired.

Provide a disconnect device to disconnect the meter from the supply source. Place this device in close proximity to the equipment and within easy reach of the operator, and mark it as the disconnecting device. The disconnecting device shall meet the relevant requirements of IEC 60947-1 and IEC 60947-3 and shall be suitable for the application. In the US and Canada, disconnecting fuse holders can be used. Provide overcurrent protection and disconecting device for supply conductors with approved current limiting devices suitable for

protecting the wiring. If the equipment is used in a manner not specied by the

manufacturer, the protection provided by the device may be impaired.

FCC PART 15 INFORMATION

NOTE: This equipment has been tested by the manufacturer and found to comply with the limits for a class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area may cause harmful interference in which case the user will be required to correct the interference at his own

expense. Modications to this product without the express authorization of the

manufacturer nullify this statement.

N998

3

EM3555

Loss Alarm

kWh

1234.5

Introduction

INTRODUCTION

Parts of the EM Series

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The EM3555 DIN Rail Power Meter provides a solution for measuring energy data with a single device. Inputs include Control Power, CTs, and 3-phase voltage. The EM3555 supports multiple output options, including solid state relay contacts, Modbus, data logging, and pulse. The LCD screen on the faceplate allows instant output viewing.

The EM3555 Meter is capable of bidirectional metering. Power is monitored in both directions (upstream and downstream from the meter). The meter is housed in a plastic enclosure suitable for installation on T35 DIN rail according to EN50022. The EM3555 can be mounted either on a DIN rail or in a panel.

Observe correct CT orientation when installing the device.

Figure 1 shows the parts of the EM Series Compact Power and Energy Meter.

Figure 1 EM Series Meter

IA

IB

IC

-+-+-

A B C Alarm Energy

+

Phase

Pulse

Modbus

OUTPUT

Shield

Two 5-character rows of display text. Top row alphanumeric; Bottom row numeric only

The red Alarm LED lights when any of the 3 phase voltages drop below the selected threshold. The green Energy LED lights momentarily each time the Energy output pulse is active.

- 600V

CE: 90V

L-L

NC NO + - S

CONTROL POWER

- 300V

L-N

0.1A 50/60 Hz

Earth

Common - 1 or 1/3 VAC Input

EM35XX

VOLTAGE INPUTS CAT III 50/60 Hz

A B C N 1 2

VA

VB

VC

UL: 90V

L-N

Neutral

Control

Power

4

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DIMENSIONS

Figure 2 EM Series Dimensions

2.3”

(59 mm)

Meter Housing

4.2”

(107 mm)

1.8”

(45 mm)

(39 mm)

3.6”

(91 mm)

1.5”

1.9”

(48 mm)

EM3555

Dimensions

Bottom View (DIN Mount Option)

3.6 “

(91 mm)

0.2 “

(4 mm)

Bottom View (Screw Mount Option)

2.4 “

(61 mm)

4.2 “

(107 mm)

1.2 “

(31 mm)

++

0.3 “

(8 mm)

(99 mm)

4.3 “

(109 mm)

3.9“

+

0.4 “

(10 mm)

5

EM3555 Data Output

DATA OUTPUT

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Table 2 Data Output

Full Data Set (FDS):

Signed Power: real, reactive, and apparent 3-phase total and per phase

Real and Apparent Energy Accumulators: import, export, and net; 3-phase total and per phase

Reactive Energy Accumulators by Quadrant: 3-phase totals and per phase

Congurable for CT & PT ratios, system type, and passwords

Diagnostic alerts

Current: 3-phase average and per phase

Volts: 3-phase average and per phase line-line and line-neutral

Power Factor: 3-phase average and per phase

Frequency

Power Demand: most recent and peak (import and export)

Demand Conguration: xed, rolling block, and external sync

Data Logging:

Real Time Clock: user congurable

10 user congurable log buffers: each buffer holds 5760 16-bit entries (user congures which 10

data points are stored in these buffers)

User congurable logging interval (when congured for a 15 minute interval, each buffer holds 60

days of data)

Continuous and Single Shot logging modes: user selectable

Auto write pause: read logs without disabling the meter’s data logging mode

6

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INSTALLATION

EM3555

Installation

NOTE: Observe correct CT orientation.

The meter can be mounted in two ways: on standard 35 mm DIN rail or screw-mounted to the interior surface of the enclosure.

A. DIN Rail Mounting

1. Disconnect and lock out power. Use a properly rated voltage sensing device to confirm power is off.

2. Attach mounting clips to the underside of the housing by sliding them into the slots from the inside. The stopping pegs must face the housing, and the outside edge of the clip must be flush with the outside edge of the housing.

3. Snap the clips onto the DIN rail. See diagram of the underside of the housing (Figure 3).

Figure 3 Attach mounting clips for DIN Rail

with outside edge

Snap onto

Insert clips from

inside

DIN rail

4. To prevent horizontal shifting across the DIN rail, use two end stop clips.

B. Screw Mounting

1. Disconnect and lock out power. Use a properly rated voltage sensing device to confirm power is off.

2. Attach the mounting clips to the underside of the housing by sliding them into the slots from the outside. The stopping pegs must face the housing, and the screw hole must be exposed on the outside of the housing.

3. Use three #8 screws (not supplied) to mount the meter to the inside of the enclosure. See diagram of the underside of the housing (Figure 4).

Figure 4 Attach Clips for screw mounting

Insert clips from

outside

Screw holes exposed for mounting

7

EM3555 Supported System Types

SUPPORTED SYSTEM TYPES

Table 3 Supported system types

CTs Voltage Connections System Type Phase Loss Measurements Wiring Diagram

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The meter has a number of different possible system wiring congurations (see Wiring Diagrams). To congure the meter, set the System Type via the User

Interface or Modbus register 130. The System Type tells the meter which of its current and voltage inputs are valid, which are to be ignored, and if neutral is connected. Setting the correct System Type prevents unwanted energy accumulation on unused inputs, selects the formula to calculate the Theoretical Maximum System Power, and determines which phase loss algorithm is to be

used. The phase loss algorithm is congured as a percent of the Line-to-Line

System Voltage (except when in System Type 10) and also calculates the

expected Line to Neutral voltages for system types that have Neutral (12 & 40).

Values that are not valid in a particular System Type will display as “----” on the User Interface or as QNAN in the Modbus registers.

Number of wires

Qty ID Qty ID Type Modbus

Register 130

User Interface: SETUP> S SYS

VLL VLN Balance Diagram number

Single-Phase Wiring

2 1 A 2 A, N L-N 10 1L + 1n AN 1

2 1 A 2 A, B L-L 11 2L AB 2

3 2 A, B 3 A, B, N L-L with N 12 2L + 1n AB AN, BN AN-BN 3

Three-Phase Wiring

3 3 A, B, C3 A, B, C Delta 31 3L AB, BC,

4 3 A, B, C4 A, B,

C, N

Grounded Wye 40 3L + 1n AB, BC, CAAN, BN, CNAN-BN-CN &

CA

AB-BC-CA 4

AB-BC-CA

5, 6

8

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WIRING

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

• Apply appropriate personal protective equipment (PPE) and follow safe

electrical work practices. See NFPA 70E in the USA or applicable local codes.

• This equipment must only be installed and serviced by qualied electrical

personnel.

• Turn off all power supplying equipment before working on or inside the

equipment.

• Always use a properly rated voltage sensing device to conrm power is

off.

• Read, understand, and follow the instructions before installing this

product.

Failure to follow these instructions will result in death or serious injury.

To avoid distortion, use parallel wires for control power and voltage inputs.

The following symbols are used in the wiring diagrams on the following pages.

Table 5 Wiring Symbols

EM3555

Wiring

DANGER

Symbol Description

Voltage Disconnect Switch

Fuse (installer is responsible for ensuring compliance with local requirements. No fuses are included with the meter.)

Earth ground

S1

S2

Current Transducer

Potential Transformer

Protection device containing a voltage disconnect switch with a fuse or disconnect circuit breaker. The protection device must be rated for the available short-circuit current at the connection point.

CAUTION

RISK OF EQUIPMENT DAMAGE

• This product is designed only for use with 1V or 0.33V current

transducers (CTs).

• DO NOT USE CURRENT OUTPUT (e.g. 5A) CTs ON THIS

PRODUCT.

Failure to follow these instructions can result in overheating and permanent equipment damage.

9

EM3555 Wiring Diagrams

WIRING DIAGRAMS

WARNING

RISK OF ELECTRIC SHOCK

CT negative terminals are referenced to the meter’s neutral and may be at elevated voltages

· Do not contact meter terminals while the unit is connected

· Do not connect or short other circuits to the CT terminals

Failure to follow these instructions can result in death or serious injury.

Diagram 1: 1-Phase Line-to-Neutral 2- Wire System 1 CT Diagram 2: 1-Phase Line-to-Line 2-Wire System 1 CT

Use System Type 10 (1L + 1n)

N L1

Use System Type 11 (2L)

L1 L2

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A B C N

X1

X2

White

Black

+

A

-

+

B

-

+

C

-

Diagram 3: 1-Phase Direct Voltage Connection 2 CT

Use System Type 12 (2L + 1n) Use System Type 31 (3L)

L1 L2

N

A B C N

X1

X2

X1

X2

White

Black

White

Black

+

A

-

+

B

-

+

C

-

X1

White

Black

X2

Diagram 4: 3-Phase 3-Wire 3 CT no PT

L1 L2 L3

X1

White

Black

X1

X2

White

Black

X1

X2

White

Black

X2

A B C N

+

A

-

+

B

-

+

C

-

A B C N

+

A

-

+

B

-

+

C

-

Diagram 5: 3-Phase 4-Wire Wye Direct Voltage Input Connection

3 CT

Use System Type 40 (3L + 1n)

L1N L2 L3

A B C N

X1

X2

X1

X2

X1

X2

White Black

+

A

-

+

B

-

+

C

-

10

Diagram 6: 3-Phase 4-Wire Wye Connection 3 CT 3 PT

Use System Type 40 (3L + 1n)

L1N L2 L3

A B C N

X1

X2

X1

X2

White Black

White

Black

White

Black

+

A

-

+

B

-

+

C

-