Electrex EXA 96 Manuel d'installation - Page 3

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NOTE n.1

3P4W

3 phases 4 wires

2P2W

2 phases 2 wires

1P2W

1 phases 2 wires

3 phases 2 wires

3P3W-B-3U

1 phases 3 wires

3P4W-B-3U

1 phases 4 wires

3P3W-B

1 phases 2 wires

3P4W-B

1 phases 2 wires

3P3W

2 phases 3 wires

NOTE n.2

POWERS

Integration time of the average value (AVG) and peak value (MD) for

Power (from 1 to 60 minutes).

CURRENTS

Integration time of the average value (AVG) and peak value (MD) for

Current (from 1 to 60 minutes).

NOTE n.3

NORMAL

Classic Alarm with reference to a ﬁ xed threshold or to maximum and

minimum delay and applicable hysteresis. "AVG" parameter is not used.

UNBAL%

Considers also the 2 following registers of the selected one in "MEAS".

"THRE" parameter becomes a % value. Alarm goes on when one of the

three register is diﬀ erent from the percentage set on "THRE" comply with

the higher value of the three read register if "MAX" is set on "TYPE", or

comply with the lower value of the three register if "MIN" is set on "TYPE"

With delay and applicable hysteresis.

UNBAL

Considers also the 2 following registers of the selected one in "MEAS".

"THRE" parameter becomes a

three register is diﬀ erent from the percentage set on "THRE" comply with

the higher value of the three read register if "MAX" is set on "TYPE", or

comply with the lower value of the three register if "MIN" is set on "TYPE"

With delay and applicable hysteresis.

3-OF-3

Considers also the 2 following registers of the selected one in "MEAS".

It operates on a ﬁ xed max or min threshold with delay and applicable

hysteresis. When all the three registers exceed the threshold the alarm

goes ON. "AVG" parameter is not used.

1-OF-3

Considers also the 2 following registers of the selected one in "MEAS".

It operates on a ﬁ xed max or min threshold with delay and applicable

hysteresis. If one of the three registers exceeds the threshold the alarm

goes ON. "AVG" parameter is not used.

NOTE n.4

MAX

Alarm setting in excess or in decrease compared with the predeﬁ ned

MIN

conditions.

With the exception of "UNBAL and UNBAL%".

NOTE n.5

MEAS

Indicates which register (measure) the alarm is related to.

See table N.1 Input Register.

THRE

Alarm threshold in absolute value, with the exception made for "UNBAL"

in which the value inserted becomes a percentage.

NOTE n.6

NORMAL

Alarm remains active during the duration of the event. It restores auto-

matically.

HOLD

Alarm remains active until the manual reset via Modbus.

NOTE n.7

ALARM 1

MODBUS alarm (Associated with output 1 if present)

ALARM 2

MODBUS alarm (Associated with output 2 if present)

ALARM 3

MODBUS alarm (Associated with output 3 if present)

ALARM 4

MODBUS alarm (Associated with output 4 if present)

NOTE n.8

OFF

LED-1

S0-1, 2, 3, 4

NOTE n.9

Power (Energy) Active Imported / Exported

ER L

Power (Energy) Reactive Inductive Imported / Exported

ER C

Power (Energy) Reactive Capacitive Imported / Exported

Power (Energy) Apparent Imported / Exported

EA+

Power (Energy) Active Imported

ER L+

Power (Energy) Imported Inductive Reactive

ER C+

Power (Energy) Imported Reactive Capacitive

ES+

Power (Energy) Apparent Imported

EA-

Power (Energy) Active Exported

ER L-

Power (Energy) Exported Inductive Reactive

ER C-

Power (Energy) Capacitive Reactive

ES-

Power (Energy) Apparent Exported

NOTE n.10

YES

Referred to the primary of the current transformer (CT)

Referred to the secondary of the current transformer (CT)

ALARM SETUP EXAMPLE

Alarm (latching) when the average active power (MEAS 344) exceeds the value of 100

kW, hysteresis of 5% and delay of 5 seconds; set the parameters as in the table:

ALARM 1 (note n.7)

NORMAL, UNBAL%, UNBAL,

MODE (note n.3)

3-OF-3, 1-OF-3

DIRECTION (note

MAX, MIN

n.4)

DATA ADDRESS

Controlled measure. See table n.1 for register

(note n.5)

selection

THRESHOLD (note

Threshold value

n.5)

HYSTERESIS

1...99 (%)

ON DELAY

1 sec ...99 minutes

OFF DELAY

1 sec ...99 minutes

OUT MODE (note

NORMAL, HOLD

n.6)

Star

Two-phases

Single phase

3 Current Inputs single phase o three phases

Balanced triangle

Balanced star

Balanced triangle

Balanced star

Triangle

value. Alarm goes on when one of the

The instrument's LED remains oﬀ

The instrument's LED ﬂ ashes according to the

selected pulse generator

SETUP SEQUENCE

PAGE

ANALOG OUT 1

MEAS

200

MODE

4-20

MIN

0.000

MAX

0.000

ANALOG OUT 2 (see ANALOG OUT 1)

Analog output

For loads with impedance less than or

equal to 250 ohms.

AO1

10 11

AUX IN/OUT

Max 250 ohm

NORMAL

MAX

344

NOTE: A

+100.0 K

MEAS

Indicates which register (and thus measure) the alarm is related to.

See Table N.1 (Input registers).

05 SEC

NOTE: B

01 SEC

MIN

Associated scale value starts at 0 and 4 mA

NORMAL

MAX

Full scale value associated with 20 mA

ANALOG OUTPUT

PARAMETERS

VALUES AVAILABLE

DATA ADDRESS

Controlled measure. See table n.1

(note A)

for register selection

MODE

0-20, 4-20

MIN (note B)

MAX (note B)

Common (negative)

Output 1 (positive)

Output 2 (positive)

For loads with higher impedance of 250

ohms it is necessary to include in series an

external power supply. The voltage to be

applied is given by the following formula:

V = (R-250) x 0.027

(E.g. with an impedance of 1 Kohm, the

voltage to be applied is:

(1000-250) x 0.027= 20.25 Vdc

AO2

AO1

10 11

AUX IN/OUT

R max = (Vdc / 0.027) + 250

Vdc

DEFAULT

000

4-20

0.000

N L

230 V~

24V =

- +

AO2

R max

435

583

694

1138