Te connectivity 549 ac User manual

Installation and

Operating Instructions

549 AC Ammeter

AC ammeter for measuring single phase

current.

Introduction

The 549 Digital Ammeter is designed to accurately measure AC

RMS Current via a Current transformer. Measurements will be

displayed on an integral LCD. The compact design allows it to be

fitted in a standard 17/32 inch switch knock out. The product

harvests power from the input signal. No other power supply is

required to power this product.

This manual provides all the necessary instructions to safely

install and operate the instrument.

Front Panel Buttons

In measurement mode, the buttons control the displayed

measurement as follows:

Screen navigation

In set-up mode, this is the ‘Next‘ button.

Changes the highlighted value

(set-up mode only)

Setting up

The instrument has a default CT ratio setting of 5:5A. Before

operation the product MUST be set to the correct CT ratio.

The instrument is fitted with an internal battery which has a

limited life expectancy as it is only designed for commissioning

purposes, when battery powered pressing two buttons

simultaneously enters “Setup” mode. The Instrument will

automatically switch off after approximately 10 seconds of

inactivity. The battery supplies the programming function and

does not affect the overall operation of the instrument. If the

battery does become exhausted the setup mode can still be

accessed by passing a current between 10-100% of nominal

through the product.

•Press and hold the two buttons

and simultaneously (for five

seconds if not battery powered) until

the CT Ratio screen is displayed.

•Press the button to enter CT ratio, edit mode. The

figure furthest left on the display will flash, use the

button to change value of this digit, to the desired value

then use the button to move to the next digit.

Repeat this action for all the digits until the correct primary

current of the CT has been selected.

•After making changes to the last digit press the

again, now all the primary current 4 digits will flash at

the same time.

•Press the button again to

confirm the value and the

display screen will show the

word ‘SET’. This indicates that

the value has been stored in

the product. Press the

button again to exit “edit mode”, the currently selected

primary CT value will be displayed.

•To exit the Set-Up mode press both and

buttons and the instrument will return to the measuring

screen.

Setup Menu Structure

•Press and hold the two buttons and

simultaneously (for approximately 10 seconds if not

battery powered) until the CT Ratio screen is displayed.

CT Ratio

•Press the again, to move to the

next screen in the menu.

Model Number

•Press the again, to move to the next screen in the

menu.

•You cannot edit this screen

Serial Number (HEX)

•Press the again, to move to the

next screen in the menu.

•You cannot edit this screen

Version Number

•Press the again, to move to the

next screen in the menu.

•You cannot edit this screen

Segment Test

•Press the again, to move to the

next screen in the menu.

•You cannot edit this screen

•To exit the Set-Up mode, either press both and

buttons (for approximately 10 seconds if not battery

powered) and instrument will return to the measuring

screen automatically.

•If the product is being setup under

battery power then the LO screen may

appear briefly as the product returns to

measurement mode. Before the

battery power is disconnected.

549

Installation

The unit may be mounted in a panel of any thickness up to a

maximum of 6mm (0·25in). Leave enough space behind the

instrument to allow for bends in the connection cables. As the

front of panel enclosure conforms to IP52, it is protected from

dripping water. The unit is intended for use in a reasonably

stable ambient temperature within the range -10 to +55°C. Do

not mount the unit where there is excessive vibration or in

excessive direct sunlight.

Safety

The unit is designed in accordance with BS EN 61010-1:2001

(IEC 61010-1:2001) – Permanently connected use, Normal

condition. Installation category III, pollution degree 2, basic

insulation for rated voltage. Measurement Category III.

EMC Installation Requirements

Whilst this unit complies with all relevant US EMC (electro-

magnetic compatibility) regulations, any additional precautions

necessary to provide proper operation of this and adjacent

equipment will be installation dependent and so the following can

only be general guidance:

•Avoid routing wiring to this unit alongside cables and

products that are, or could be, a source of interference.

•The signal to the unit should not be subject to excessive

interference. In some cases, a supply line filter may be

required.

•To protect the product against incorrect operation or

permanent damage, surge transients must be controlled. It

is good EMC practice to suppress transients and surges at

the source. The unit has been designed to automatically

recover from typical transients; however in extreme

circumstances it may be necessary to temporarily reduce the

magnitude of the measured signal to the point where the

instrument turns off for a period of greater than 10 seconds

to restore correct operation.

•It is good practice to install sensitive electronic instruments

that are performing critical functions in EMC enclosures that

protect against electrical interference causing a disturbance

in function.

Wiring

Input connections are made to terminals posts. Use cable lugs

suitable for 6-32 UNC screw. Wiring should conform to national

Electrical Code Class 1 and sized appropriate to CT secondary

current ratings.

The current inputs of this product are designed for

connection into systems via current transformers only.

Instrument transformers used for connection to the meter must

be of approved type and compliant with ANSI/IEEE C57.13 or

IEC 60044-1, selected and sized appropriate to the supply

network being monitored. CT secondaries must be grounded in

accordance with local regulations. It is desirable to make

provision for shorting links to be made across CT secondary’s to

permit easy replacement of a unit should this ever be necessary.

This instrument is intended for panel mounting. Terminals must

be enclosed within the panel. Terminal nuts should be tightened

to 8.0 lbs in (1.0Nm) only.

Earth/Ground Connections

For safety reasons, current transformer secondary connections

should be grounded in accordance with local regulations. Under

no circumstances should the product be operated without this

Earth connection.

Maintenance

In normal use, little maintenance is needed. As appropriate for

service conditions, isolate from electrical power, inspect the unit,

and remove any dust or other foreign material present.

Periodically check all connections for freedom from corrosion and

screw tightness, particularly if vibration is present.

The front of the case should be wiped with a dry cloth only. Use

minimal pressure, especially over the viewing window area. If

necessary wipe the rear case with a dry cloth. If a cleaning agent

is necessary, isopropyl alcohol is the only recommended agent

and should be used sparingly. Water should not be used. If the

rear case exterior or terminals should be contaminated

accidentally with water, the unit must be thoroughly dried before

further service. Should it be suspected that water might have

entered the unit, factory inspection and refurbishment is

recommended.

Contains no serviceable parts:

In the unlikely event of a repair being necessary, it is

recommended that the unit be returned to the factory or nearest

Crompton Instruments / TE Connectivity service centre.

This product contains a Lithium cell, and should be recycled or

disposed of in accordance with local environmental regulations.

Specification

Measurement Inputs

Nominal Input Current 5A AC RMS

Max. Continuous input Overload 6A AC RMS

Max. Short duration input Current 50A for 1 second.

Maximum VA Burden 3 VA

Frequency 60Hz +/- 2%

Maximum Total Harmonic Distortion 30%

Maximum Crest Factor 1.68

Range of Use

Values of measured quantities, components of measured

quantities, and quantities which affect measurement errors to

some degree, for which the product gives meaningful readings:

Current

1 … 120% of nominal

Ratio 5 … 2000A

Accuracy

Current (A) ± 1% of range

Warnings

•During normal operation, voltages hazardous to life

may be present at some of the terminals of this unit.

•Installation and servicing should be performed only

by qualified, properly trained personnel abiding by

local regulations.

•Ensure all supplies are de-energised before

attempting connection or other procedures.

•Terminals should not be user accessible after

installation and external installation provisions must

be sufficient to prevent hazards under fault

conditions.

•Never open-circuit the secondary winding of an

energized current transformer.

•This product should only be operated with CT

secondary connections Earthed.

•If this equipment is used in a manner not specified

by the manufacturer, protection provided by the

equipment may be impaired.

•If sufficient torque setting of 8.0Ibs in (1.0Nm) cannot

be applied to the rear fixing, the product should not

be installed.

Caution: Risk of

Electric Shock

C D H

1.86

47.3

1.60

40 .8

0 .47

12.0

1.74

44.4

0 .70

17.8

0 .87

22.1

0 .99

12.0

0 .51

13.0

0 .16

4.0

J K

1.0 8

27.5

1.18

30 .0

PAN EL CUT-OU T 2

PAN EL CU T-O UT 1

(USE ADAPTOR RIN G)

AD APTO R RIN G

1.20

30 .5

0 .57

14.5

0 .25

6.40

1.0 9

27.8

0 .15

3.9

GU ID E N O TES FOR USIN G SUPPLIED FITTIN G KIT.

1) PLACE IN STRUM EN T IN PAN EL CUTOUT.

2) FIT AD APTOR RIN G , IF USIN G CUTOUT 1.

3) FIT RETAIN IN G RIN G, EN SURIN G TABS ARE ALIGN ED AS SHOW N .

(APPROX 45 DEGREE AN GLE RELATIVE TO GROOVES IN CASE)

4) IM PORTAN T - N UT 'A' IS USED FOR FACTORY ASSEM BLY ON LY AN D

M UST N OT BE TAM PERED W ITH D URIN G IN STALLATION .

5) FIT N UT 'B', EN SURIN G A N O M 3mm GAP IS LEFT BETW EEN IT AN D N UT 'A'

6) FIT W ASHERS PRIOR TO AN D AFTER CON N ECTION W IRES.

7) FIT N UT 'C'.

8) EN SURE N UT 'B' IS REFRAIN ED FROM M OVEM EN T.

9) N UT 'C' SHOULD N O W BE TIGH TEN ED.

RETAIN IN G RIN G

AD APTOR RIN G

ABC

IM PORTAN T

SEE N OTES 4 - 9

Connection Diagram

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 ±2°C

Input waveform 60Hz ± 0.5%

Input waveform Sinusoidal

(distortion factor <0·005)

Magnetic field of external

origin Terrestrial flux

Environment

Operating temperature -10°C to +55°C

Storage temperature -30°C to +85°C

Maximum operating and storage temperatures are in the context

of typical daily and seasonal variation.

Relative humidity 0 to 95%, non-condensing

Altitude Up to 2000m

Vibration 10Hz to 50Hz, IEC 60068-2-6, 2g

Shock 30g in 3 planes

Mechanics

Dimensions 40.80x47.25x59.25mm (h x w x d)

1.60”x 1.86”x2.33” (h x w x d)

Depth (behind panel)

2.36” (60 mm) maximum

Case protrusion

(front of panel) 0.48” (12.2 mm) maximum

Sealing IP52 (front panel), IP30 (case) (minimum)

Approval, Certification, and Standards Compliance

EMC, Emissions FCC Part 15

Safety

61010

1:2

edition.

While TE Connectivity (TE) has made every reasonable effort to ensure the accuracy of the information in this catalogue, TE does not guarantee that it is error-free, nor does TE make any other

representation, warranty or guarantee that the information is accurate, correct, reliable or current. TE reserves the right to make any adjustments to the information contained herein at any time

without notice. TE expressly disclaims all implied warranties regarding the information contained herein, including, but not limited to, any implied warranties of merchantability or fitness for a

particular purpose. The dimensions in this catalogue are for reference purposes only and are subject to change without notice. Specifications are subject to change without notice. Consult TE

for the latest dimensions and design specifications. TE Connectivity and TE connectivity (logo) are trademarks. CROMPTON is a trademark of Crompton Parkinson Limited and is used under