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
ma
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 mm
2
.
ENERGY COUNTERS
ELM-96
ELM-96
REAR PANEL (connections side)
