Elco ELM-96 Manuale utente

INSTRUCTION MANUAL

IM425-U v3.1

ELM-96

MULTIFUNCTION VOLT/AMMETER

GENERAL

The digital Multifunction Volt/Ammeter series ELM-96 allow monitoring the

main electrical parameters present on a distribution line. The local display of

the electrical parameters is being made through 3 display with red LED,

which grant a good and simultaneous reading of various measures. The

intuitive selection of the measures to visualise, which are signalled by their

corresponding LED, completes a clear and simple front panel, which offer a

lot of useful information.

On top of the instantaneous measuring, these instruments visualise the

maximum peak of the main parameters (maximum peak and maximum

demand or maximum average value).

Multifunction Volt/Ammeter series ELM-96 replace, in an unique device, all

the functions of voltmeters, ammeters and frequency meters, permitting a

great economic saving, due to reducing of dimension and wiring, so as

optimising the instruments management, since one has most of all in one, for

electrical boards, switch-boards and Gen-Sets.

AVAILABLE MODELS

ELM-96

ACCESSORI ED OPZIONI

accessories: transparent cover for frontal protection.

options: C1 auxiliary power supply 230 V

C2 auxiliary power supply 115 V

1A current inputs for CT ../1Amp.

T current inputs with galvanic insulation (not for direct connection line insertion)

P n.2 digital output alarm signal (Photomos ca/cc).

INTRODUCTION

The ELM-96 models are only featured for visualising the electrical parameters. The power supply is taken from the

measured voltage or self-supplied.

MESURED PARAMETERS

Parameters Measuring units Identification Symbols

Phase and three phase voltage [V-kV] V L1-N V L2-N V L3-N ΣV L-N

Phase to phase and three phase system voltages [V-kV] V L1-L2 V L2-L3 V L3-L1 ΣV L-L

Phase and three phase currents [A-kA] I L1 I L2 I L3 ΣI

Frequency [Hz] Hz L1

Hour meter [hr] hr1 hr2 hr3

STORED PARAMETERS

Instantaneous Values:

Maximum phase voltage [V-kV] V L1-N max V L2-N max V L3-N max

Minimum phase voltage [V-kV] V L1-N min V L2-N min V L3-N min

Maximum phase to phase voltage [V-kV] V L1-L2 max V L2-L3 max V L3-L1 max

Maximum phase current [A-kA] I L1 max I L2 max I L3 max

Measured value in 15’

Average phase current (maximum demand) [A-kA] I L1 max (avg) I L2 max (avg) I L3 max (avg)

checks Check phase rotation

ELM-96

instruction manual

IM425-U v3.1

pag. 1

INSTALLATION

WARNING FOR THE USER

Read carefully the instructions/indications contained in this manual before installing and using the instrument.

The instrument described in this manual is intended for use by properly trained staff only.

SAFETY

This instrument has been manufactured and tested in compliance with EN 61010-1 standards. In order to maintain these

conditions and to ensure safe operation, the person must comply with the indications and markings contained in the

manual. When the instrument is received, before beginning installation, check that it's OK And it has not suffered any

damage during transport. When starting installations make sure that the operating voltage and mains voltages are

compatible with the device instructions. The instrument power supply must not be earthen. Only qualified and authorised

personnel must carry out maintenance and/or repair. If there is ever the suspicious that, that there is a lack of safety,

during operation, the instrument must be disconnected and cautions taken against accidental use.

Operation is no longer safe when: The instrument doesn't work. - There is clearly visible damage. - After serious

damage incurred during transport. - After a storage under unfavourable conditions.

WIRING

For a correct use of the device, the wiring diagram contained in the present manual must be respected.

The connections are available on the screw terminal:

- Auxiliary power supply:

The power supply is take from voltage inputs.

There are 3 different auxiliary supplies:

Vn 110V = 100-125V 50-60Hz (option C2)

Vn 230V = 220-240V 50-60Hz (option C1)

Vn 400V = 380-415V 50-60Hz (standard)

In the standard version the voltage is 400V and it’s taken between the phases L2-L3.

In the following table it’s possible to see the measurable voltage depending of the type of power supply.

Power supply terminals Rated voltage Range of measurable voltage

400V 300÷500V phase to phase (175÷290V phase-neutral)

230V 175÷290V phase to phase (130÷170V phase-neutral)

L2-L3 (phase to phase power supply)

110V 85÷145V phase to phase (50÷85V phase-neutral)

230V 300÷500V phase to phase (175÷290V phase-neutral)

L3-N (phase – neutral power supply) 110V 175÷290V phase to phase (100÷170V phase-neutral)

The standard version allows applying the instrument at all the three-phase network 400V with or without neutral supplied.

For example for application on single phase 230V it will need the L3-N / 230V. While for applications in medium voltage

(for example using external voltage transformer 15 / 0.1 kV phase to phase) it will need the version L2-L3 / 110V.

- measuring voltage inputs:

4 terminals are available for the connection to the 3 phase and neutral of the measuring network, the maximum voltage

phase to phase shouldn't be over 500 V rms and it will always be depending on the auxiliary power supply.

In case of a 3 phase system without neutral, or non-distributed neutral, to leave terminal N free.

It’s possible to use external voltage transformer. In fact the transformation rate of the external transducer can be set in

the SETUP of the instrument and the visualisation allows the reading of voltage up to 40,0 kV.

- measuring current inputs:

4 terminals are available for the connection to 3 external CT’s with secondary 5A, it’s possible to use 2 CT’s on 3 wires

system (three phases Aaron wiring). The use of external CT’s is absolutely required.

The transformation rate of the external transducer can be set in the SETUP of the instrument and the visualisation allows

the reading of current up to 9,99 kA.

ELM-96

instruction nual

IM425-U v3.1

pag. 2

NOTE: It's a must to respect the

phase sequence. The connections

between current and voltage phase

inputs must not be inverted (for

example, CT placed on phase L1

must correspond to the I1 input). So

as it is not correct to invert S1 and S2

terminals.

To fix the device at the panel, insert

the two brackets into their

corresponding grove holes, at the

side of the enclosure and fix up the

screws. It’s better to put an external

protection with fuses for the voltage

inputs and to use adapted cables for

the working currents and voltages:

section from 0.5 to 2.5 mm2.

ENERGY

COUNTERS

ELM-96

REAR PANEL (connections

side)

WIRING DIAGRAM

ELM

INSERTION ON THREE-PHASE

LINE WITH 3 or 4 WIRES

On line with 3 wires (without neutral

with neutral not

supplied)

the N terminal must not be

connected

ELM-96

instruction manual

IM425-U v3.1

pag. 3

LOAD

ELM

INSERTION ON THREE PHASE

LINE WITH 4 WIRES WITH 3 TV

LOAD

ELM-96

instruction manual

IM425-U v3.1

pag. 4

ELM

CURRENT

INSERTION

ON THREE PHASE LINE WITH 2

(insertion

AARON)

LOAD

ELM

VOLTAGE INSERTION

THREE PHASE LINE WITH 3

WIRES

WITH 2

This insertion is possible only

with

the internal CT version (-t

suffix).

S1 S2 S1

P1 P2 P1

L1 LOAD

ELM

INSERTION ON BALANCED

THREE

PHASE LINE WITH 3 or 4

WIRES

On line with 3 wires (without neutral

with neutral not

supplied)

the N terminal must not be

connected

ELM-96

instruction manual

IM425-U v3.1

pag. 5

L3 S1

LOAD

ELM

INSERTION ON SINGLE

PHASE

LINE

Only for model with

phase-neutral

power supply (Vaux

L3-N)

L S1

N P1

LOAD

ELM-96

instruction manual

IM425-U v3.1

pag. 6

FRONT PANEL DESCRIPTION

DESCRIPTION:

A: Push-button for visualising of the three phase system parameters with the corresponding indication LED.

By pressing during 5 seconds, user accedes to programming the instrument (SETUP).

B: Push-button for selecting the measures to visualise on display E.

C: LED’s for indicating the measures visualised on display E and the eventual multiplier factor of each parameter

(reading k =kilo x1000).

D: LED for indicating the visualisation of the memorised peak values.

E: Three displays for visualising the measures, subdivided by phases. Should the LED ΣL be glowing, it indicates

the three-phase system value of the selected parameter.

A+B: By pressing the two keys simultaneously at the visualisation mode, it accedes to the visualisation of the

memorised peak values.

MENU OF INSTRUMENT PROGRAMMING (

SETUP

)

After the connecting the power supply to the instrument and waiting few seconds (all LED’s will glow and the first

indication of the firmware appears on the display and all segments will glow later), press and keep pressing the key A

during 5 seconds, when the message

seT

UP will appear on the display E.

The values set are hold also in absence of the auxiliary power supply.

SET GENERAL PARAMETER (SET

)

Entry to menu:

seT

UP Æ

seT

RESET

SET

DO1

SET

DO2

SET

HR_

ELM-96

instruction manual

IM425-U v3.1

pag. 7

DO_ OFF

OFF

SET CT Increase

Set CT ratio

from 1 to

2000

Decrease

SET VT Increase

Set VT ratio

from

0.1

400.0

Decrease

seT AV9

T Increase

Set average time

from 1 to

minutes Decrease

seT 3pH

BALANC

Set connection

UN_BAL

Type 1PH

seT

MDE

-3-

Set wiring connection

type

-4-

seT SYN

MDE

Set synchronism

type

seT SCHROLL

OFF

SET PAS Increase

Set Password

OFF

- 0002

9999

Decrease

Confirm and end of general settings

- Programming of the transformation rate of the external CT’s

The programming of the CT’s rate considered as the rate between primary and secondary (example: with CT 1000/5, we

must set 200), must be done with the push-button on the front panel.

By pressing the key A again it will appear the message CT (current transformer) and the value of the transformation rate

(set to 1 by the manufacturer). To increase the value press the B button while to reduce the value press the A button with

B already pressed (the variation is unit for unit). To increase the speed up the value setting, it’s necessary to hold

pressed the B or the couple A and B buttons, the variation will happen successively by tens and hundreds. To come back

to increase or to reduce the value on unit by unit way, it’s necessary to release and to press the key again. To confirm the

value set press the A button; in this way the instrument will pass to the successive programming.

If no key is pressed during a 10-second interval of time, the instrument will exit automatically from programming, without

saving the selected value.

- Programming of the transformation ratio of the external voltage transformers

After the precedent programming phase, on E display will appear the inscription VT (voltage transformer) and the value

of the transformation rate of the external TV (set to 1 from the constructor), considered as the rate between primary and

secondary (example with TV 15/0.1 kV the value will be 150).

In the same way at the programming of the CT rate will be possible to set this value. If the external TV are not used the

value to set will be 1. To confirm the value press the A button.

Programming of the average time (

seT

AVG

T’

)

After the programming phase previously described, pressing another time the A key, on the E display will appear the

message AVG

T’

and the average time settable from 1 to 30 minutes. To increase the value press the B key. To

decrease it, press the A and B keys together (from the condition of B pressed). To confirm it press the A key.

The average time is the time used to calculate the average parameters (avg) and the maximum demand (maxD).

Programming insertion mode

It’s possible to set the following mode of insertion:

UN_BAL

in a unbalanced three-phase system (default),

BALANC

a balance three phase system and 1PH

in a single phase insertion.

In the 1PH mode are displayed only the measures of l3 phase and the relative hour counter; the status of phase rotation

is not displayed.

In the

BALANC

the current and the power factor of the L3 phase are used for the calculation of L1 and L2 measures.

Programming wiring connection mode

This setting allows to definite the wiring type connection. It’s possible to chose 3 wires or 4 wires. With the 4 wires

connection the neutral parameter are displayed and enabled to use for the digital outputs settings.

Programming of the synchronism type

In this setting for the synchronization type, it’s possible to choose

to use the external frequency (on L3 phase) or

Hz to use the internal clock.

Activating or cancelling the automatic scrolling

This allows selecting ON for activating or OFF for cancelling the automatic scrolling of the measures visualisation.

Programming of the Password

The instrument is supplied without password. When a password (from 0002 to 9999) is set, using the B (to increase), A e

B (to decrease) and A (to confirm) keys, only who know this value can to enter in the setup. The password, in fact, is

required all the time that someone try to enter in the setup (pressing the A key at least 5 seconds). If the password is

wrong, the message

PASS

ERR will appear on F display and the instrument go back to the measures visualization. To

input the password, when required by the instrument, at the enter of the setup, use the A, B and C keys as the same way

done previously.

PEAK VALUES AND ENERGY COUNTERS RESET (

RESET

)

Enter in setup mode, press the B key up to show the message

ReseT

on the E display, press the A key, on the display

will appear RES

ALL

NO, press the B key another time, the message commute in RES

ALL

yes

, confirming with

the A key all stored data will be deleted. Automatically the instrument come back to the measure visualization.

ELM-96

instruction manual

IM425-U v3.1

pag. 8

Entry to menu:

seT

UP Æ

seT

RESET

SET

DO1

SET

DO2

SET

HR_

---

OFF OFF (the visualization depends on the settings and the I/O status)

To enable the chosen type, press the B key to change the indication on display G from NO to

yes

. Confirm enabling

cancellation, by pressing the A key. The indication on E display change from

yes

---

PROGRAMMING OF THE DIGITAL OUTPUT (SET DO1 SET

DO2

)

This setting is enabled only in the model with digital outputs (-p suffix in the order).

The DO1 and DO2 digital outputs can be used to signal alarms (ALR) using a comparing with two adjustable threshold

for each output. The DO1 modality setting is independent from DO2. In the menu SET DO1 and SET DO2 it’s possible

to program the function of all digital outputs. In these menus are available the following modality: ALR SYS

3PH

and

ALR SYS

123

. With ALR SYS

3PH

the digital output will function as alarm verifying that the three phase value

(average) doesn’t exceed the threshold set (ALR HI and ALR LO). With ALR

PH_ 123

the digital output will

function as alarm verifying that the maximum value of the single phases doesn’t exceed the maximum threshold set

(ALR HI) and that the minimum value of the single phases doesn’t come down the minimum threshold set (ALR

The activation of the alarm output will come after some seconds of delay set (ALR

ELM-96

instruction manual

IM425-U v3.1

pag. 9

Enter to menu:

seT

UP Æ

seT

RESET

SET

DO1

SET

DO2

SET

HR_

---

OFF OFF (the visualization depends on the settings and the I/O status)

ALR SYS

3PH

To choose the output modality

ALR

PH_

123

ALR

SEl uLN

To chose the parameter

ALR

SEl

AMP to control

ALR

SEl VLL

(see variable list)

ALR SEL FRE (only for ALR SYS

3PH

)

AlR sel

PH_

Set maximum alarm threshold Increase

ALR HI Decrease (after

there is

OFF

)

Set minimum alarm threshold Increase

ALR LO Decrease (after

there is

OFF

)

Set delay Increase

ALR

Decrease

ENTER IN THE SETUP

Confirm and end of digital output settings.

From the measures visualization, press the A keyfor at least 5 seconds, the message

SeT

Up will appear on the E displays.

CHOOSE THE DIGITAL OUTPUT TO PROGRAM

Press repeatedly the B key until the message SET DO1 (DO1 output) or SET DO2 (DO2 output) appears on the E

display. Press the A key to select this setting.

SELECT THE MODALITY OF FUNCTIONING OF THE DIGITAL OUTPUT

To select the functioning mode, using the B key: ALR SYS

3PH,

(alarm on three phase value) and ALR

PH_

123

(alarm on minimum and maximum single phase value). Press A key to confirm.

CHOOSE THE PARAMETER TO LINK TO THE DIGITAL OUTPUT

With an alarm modality set, it’s necessary to select the parameters associated to the alarm output; by pressing the B key

until the parameter choice appears on the third part (L3) of E display and the glowing the corresponding led on the D bar.

Press A key to confirm the set.

SET THE HIGH AND THE LOW THRESHOLDS

On E display will appear the message ALR Hi with the high threshold value; confirming with the A key on the same

display will appear the message ALR LO with low threshold value. The B key (to increase), A and B keys together (to

decrease) are used to set the high and the low thresholds values. The range depends by the parameter and it is linked to

the CT and VT ratios. Pressing A key to confirm.

The threshold set is linked with CT and VT ratios, for this reason it’s necessary to make this operation after the

programming of the CT and VT. The end scale value must be confirmed when CT and VT ratios are modified.

The low threshold will be lower than high threshold. If the high threshold is set as OFF the low threshold will have the

range of the high threshold.

SET THE DELAY TO THE DIGITAL OUTPUT ACTIVATION

Now it’s possible to set the delay that will pass between the alarm condition set and the activation of digital output. On E

display will appear ALR DLY and the value expressed in seconds (range 1÷900). The modification of the value is done

in the same way of the threshold set. With the confirmation (A key) the set is complete.

The programming will be referred to the digital output indicated on E display (DO1 o

DO2

With only the HI threshold set, the alarm condition is activated when the parameter set in alarm exceed the threshold.

The digital output is enabled only if the alarm condition remain activated for all delay time set. From the activation of the

digital output, the restore is automatic when the parameter decreases below the hysteresis value.

ELM-96

instruction manual

IM425-U v3.1

pag. 10

Digital

outp ut

Alarm

Threshold

Hysteresis

t <

dela y

de l ay

Functioning for

exceeding the

maximum threshold

With only the LO threshold set, the alarm condition is activated when the parameter set in alarm drop below the

threshold. The digital output is enabled only if the alarm condition remain activated for all delay time set. From the

activation of the digital output, the restore is automatic when the parameter grow above the hysteresis value.

Digital

ou tp ut

Ala rm

Hysteresis

Threshold

t <

de la y

de lay

Functioning for

dropping above

minimum threshold

With both LO and HI threshold set, the alarm condition is activated when the parameter set in alarm is outside from the

values band limited by LO and HI thresholds. The digital output is enabled only if the alarm condition remain activated for

all delay time set. From the activation of the digital output, the restore is automatic when the parameter return inside the

values band limited by LO and HI thresholds.

Digital

ou tp ut

Ala rm

Threshold

Hysteresis

Threshold

de l ay

del ay

Functioning for

exceeding or dropping

by the band defined by

maximum and

minimum threshold

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