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EMM-µD3h  EMM-µD3h-p  EMM-µD3h-485  instruction manual 

IM380-U v3.1 

pag. 2 / 12

 

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 (IEC1010) 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 trans port. 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 
occurred during transport. - After a storage under unfavourable conditions. 

 
The fixing to the DIN rail is granted by the rear spring fixing device. 
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 4 mm

2

 

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 terminals:

 

 
-  Power supply: 

The  auxiliary  power  supply  is  taken  from  the  terminals  aux1  and 
aux2. 
The rated supply voltages can be: 
 

standard: 

Vn  230V  ±  15%  50-60Hz 

under request:  Vn  110V  ±  15%  50-60Hz 
under request  Vn  400V  ±  15%  50-60Hz 

 
-  measuring voltage inputs: 

4 terminals are available for wiring to the 3 phase and neutral of the 
measuring network, the maximum voltage phase to phase shouldn't 
be over 500V rms and 290V between phase and neutral. 
In  case  of  a  3-phase  system  without  neutral  or  non-distributed 
neutral, leave terminal N free. 
For  single  phase  use,  wiring  should  be  done  between  terminals  L1 
and N and bridge L2 and L3 phases to neutral N. 
 

-  measuring current inputs: 

terminals are available for wiring to 3 external CT’s with secondary 

5A,  it’s  possible  to  use  2  CT’s  on  3  wires  lines  with  (Aron  three-
phase  wiring)  and  the  use  of  1  CT  in  case  of  single  phase  system 
(input IL1). External CT’s must always be used. 

Don't connect CT's secondary to the earth. 

The instrument’s SETUP menu allows to set the transformation rate 
of  the  external  CT and it’s possible to visualise readings of current 
up 999 A. Should the case be that calculated current is higher than 
the  maximum  value,  the  display  will show the over range condition. 
The maximum setting of the transformation ratio is 2000/5=400 

 

NOTE: For a correct measuring of the power factor and energies and powers 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 S

1 and S2 of the CT’s terminals. 

V

L

3

V

L

2

V

L

1

N

a

u

x1

a

u

x2

IL

3

IL

2

IL

1

D

o

2

D

o

1

Co

measuring voltage

inputs

max 500 V L-L

auxiliary

supply

110 or 230 or 400Vac

measuring current

inputs

max 5 A

options

S1

S2

S2

S2

S1

S1

c

A

B

RS485 serial port

2 X digital output

max 230Vac/dc  150mA

L1

L2

L3

L

V

L-N

A

kW

kVAr

kVA

V

L-L

...h

Hz /

ou t

SET

P.F.

EMM-µD3

ma x

av g

VL1

VL2

VL3

N

aux2 aux1

volta ge  inputs

V aux

S1

S1

S1

S2

S2

S2 Do2

c

Co

B

Do1

A

IL1

IL2

IL3

curr ent inputs

Содержание EMM-mD3h

Страница 1: ...ard version 110V rated 50 60Hz optional version 400V rated 50 60Hz optional version INTRODUCTION The EMM D3h are only featured for local visualising the electrical parameters The EMM D3h p has two dig...

Страница 2: ...he terminals aux1 and aux2 The rated supply voltages can be standard Vn 230V 15 50 60Hz under request Vn 110V 15 50 60Hz under request Vn 400V 15 50 60Hz measuring voltage inputs 4 terminals are avail...

Страница 3: ...PHASE LINE WITH 3 OR 4 WIRES EMM LOAD aux1 aux2 auxiliary supply VL1 VL2 VL3 N measur ing voltage inputs EMM aux1 aux2 auxiliary supply VL1 VL2 VL3 N measuring voltage inputs EMM aux1 aux2 auxiliary s...

Страница 4: ...r wiring the voltage measures input and auxiliary supply F Terminals for wiring the current measures input and the digital output when present in the instrument G LED for indicating of a three phase v...

Страница 5: ...or EMM D3h p kWh kVAr pulse Set pulse weight kWh kVAr pulse kWh kVAr pulse kWh kVAr pulse only for EMM D3h p Increase from to mS in step by 100 mS Decrease only for EMM D3h 485 Increase Set address of...

Страница 6: ...e 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 synchronis...

Страница 7: ...arm In mode the digital output DO1 will emit pulses proportional to the active energy counted while the digital output DO2 will emit pulses proportional to the reactive energy counted The proportional...

Страница 8: ...B key pressed to decrease the 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 re...

Страница 9: ...the energy meters are shown with the lighting of the LED kW h indicating the active energy values kWh whilst the lighting of the LED kVAr h are indicating the reactive energy values kVArh The lightin...

Страница 10: ...lti meter Visualization page 7 Three Phase Hour counter 520 2 h L1 L2 L3 L EMM D3 electrical multi meter VL N A kW kVAr kVA VL L h Hz out max avg SET P F Visualization page 1 VL1 N L1 on IL1 on L2 kWL...

Страница 11: ...max V L3 N max phase current I L1 max I L2 max I L3 max average phase current maximum demand I L1 max avg I L2 max avg I L3 max avg three phase system powers W max VAr max VA max average three phase s...

Страница 12: ...dance 1 M 3 4 and single phase wiring Current inputs From 0 02 to 5A permanent overload 50 from external CT s with secondary 5A optional 1A Primary programmable from 5 to 2000A self consumption 0 5VA...

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