IME Nemo 72 Le Manual Download

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01/16 10783331 WEB E cod.MF72...

Nemo 72 Le

1.6b RS485 BACNET communication

Address number:

0...127

Transmission speed:

9600 – 19200 – 38400 - 76800 bit/s

Parity bit:

none – even – odd

Network address:

0...4000

Just for 32-bit quantities

1.7

Relay output function: energy pulses, alarm, state of relay switching

The output relay

(terminals 15-29)

can be used as energy pulse repeater, as alarm relay or for

remote-controlled state of relay switching

(function available just for models with communication).

1.7a Energy pulses

Quantity that can be coupled:

active or reactive energy

Pulse weight:

1 pulse/10Wh(varh) - 100Wh(varh) - 1kWh(kvarh) - 10 kWh(kvarh) -

100kWh(kvarh) - 1MWh(Mvarh) - 10MWh(Mvarh)

Width of the pulse:

50 - 100 - 200 - 300 - 400 - 500 ms

1.7b Alarm

Quantity that can be coupled:

phase voltage

(L1-N, L2-N, L3-N)

, interlinked voltage

(L1-L2, L2-L3,

L3-L1)

, phase current

(I1, I2, I3)

, , three-phase active power, three-phase reactive power.

Intervention threshold:

intervention point, decimal point, metering unit

Alarm type:

min. or max.

Relay output contact:

normally open

(no)

or normally closed

(nC)

Hysteresis:

0…20%

Intervention delay:

0…99s

Reset delay:

0…99s

1.7c Remote-controlled state of relay switching, bistable mode (rMtb)

Relay output contact:

normally open

(no)

or normally closed

(nC)

t on:

delay elapsed between the activation remote command and the change in the state of relay

t oF:

delay elapsed between the reset remote command and the change in the state of relay

selectable values t on / t oF:

0…99s

1.7d Remote-controlled state of relay switching, time mode (rMtt)

Relay output contact:

normally open

(no)

or normally closed

(nC)

t on:

delay elapsed between the activation remote command and the change in the state of relay

t oF:

delay elapsed between the reset remote command and the change in the state of relay

selectable values t on / t oF:

0…99s

Level 2

Password = 2001

2.1

External VT or CT ratio

Vt =

External primary/secondary VT ratio

(ex. VT 600/100V Vt = 6)

Ct =

External primary/secondary CT ratio

(ex. CT 800/5A Ct = 160)

External CT ratio (Ct):

1…9999

(max. primary current 50000/5A - 10000/1A)

External VT ratio (Vt):

1,00…10,00

(max. primary voltage TV 1200V)

For voltage direct connection

(with external voltage transformer)

load Vt=1,00

By modifying the

and/or

ratios, the KWH meters are automatically reset

Phase sequence diagnostic

In the software of the device have added a specific functionality to detect and correct many
problems concerning voltage and / or current connection.
This function can be activated through password and allows to display and modify the connec-
tion sequence provided that the following conditions are respected:

The neutral wire (in a 4-wire network) is connected to the right terminal

(normally number1)

No crossings between cables connected to CTs

(e.g. avoid that on phase 1 of the meter-terminals

1 and 3 - are connected some way both to CT1 and CT2)

The power factor is between 1 and 0,5 - Inductive load - for each phase.

See www.imeitaly.com “TECHNICAL SUPPORT”