Download Micrologic control units 2.0 A, 5.0 A, 6.0 A and 7.0 A

Micrologic control units
2.0 A, 5.0 A, 6.0 A and 7.0 A
Low Voltage Products
User manual
We do more with electricity.
Micrologic control units
2.0 A, 5.0 A, 6.0 A and 7.0 A
Discovering your control unit
2
Identifying your control unit
Overview of functions
2
4
Setting your control unit
10
Selecting the type of neutral protection
Setting procedure
Setting the Micrologic 2.0 A control unit
Setting the Micrologic 5.0 A control unit
Setting the Micrologic 6.0 A control unit
Setting the Micrologic 7.0 A control unit
10
11
12
13
14
15
Fault and status indications
16
Resetting the fault indications
and checking battery status
Testing the earth-fault
and earth-leakage functions
17
Menus
18
Accessing the menus
Measuring phase currents
Displaying the maximum current values
Resetting the maximum current values
Viewing the settings
18
19
20
21
22
Technical appendix
24
Tripping curves
Changing the long-time rating plug
Zone selective interlocking (ZSI)
Digital display
Thermal memory
24
26
27
28
29
1
Micrologic A
16
Schneider Electric
All Compact NS800-3200 and Masterpact
NT and NW circuit breakers are equipped
with a Micrologic control unit
that can be changed on site.
Control units are designed to protect
power circuits and connected loads.
Micrologic 2.0 A: basic protection and ammeter
E51352A
Identifying your control unit
Designations
E51384A
Discovering your
control unit
Micrologic 2.0 A
t
100 %
40 %
menu
long time
Ir
.6
.5
.4
x In
0
alarm
tr
8
(s) 4
.9
12
16
.95 2
.98 1
20
24
1
.5
.8
.7
Ir
Isd
I
at 6 Ir
instantaneous
Isd
3 4 5
2.5
2
1.5
Long time + Instantaneous
6
8
10
x Ir
Micrologic 2.0 A
X
E51354A
E51385A
Micrologic 5.0 A: selective protection and ammeter
Micrologic 5.0 A
Y
40 %
Z
menu
long time
Ir
.7
.6
.5
.4
alarm
tr
(s) 4 8 12
.9
16
.95
2
.98 1
20
24
1
.5
.8
x In
0
Isd 4
5
3
2.5
6
2
8
1.5
10
x Ir
X: type of protection
c 2 for basic protection
c 5 for selective protection
c 6 for selective + earth-fault protection
c 7 for selective + earth-leakage protection
Ir
Isd
Ii
I
at 6 Ir
instantaneous
short time
tsd
(s)
.4 .4 .3
.3
.2
.1
on
setting
2
I t
Ii
.2
.1
0
6
4
3
2
delay
8 10
12
15
off
x In
Long time + Short time + Instantaneous
Z: type of measurement
c A for "ammeter"
c P for "power meter"
c H for "harmonic meter"
c no indication: no measurements
E51354A
Micrologic 6.0 A
E51395A
Micrologic 6.0 A: selective + earth-fault protection and
ammeter
E51387A
t
t
2
I t on
100 %
2
I t off
40 %
menu
long time
Ir
.7
.6
.5
.4
Isd
alarm
tr
8
(s) 4
.9
12
16
.95 2
.98 1
20
24
1
.5
.8
x In
0
at 6 Ir
3
4 5
tsd
.4 .4 . 3
.2
.3
.1
.2
.1 2 0
(s)
6
8
10
2.5
2
1.5
on
x Ir
setting
Ii
8 10
12
15
off
2
x In
6
4
3
I t
delay
Ig
D E F
G
C
H
B
I
A
Ir
Isd
Ii
0
I
Ig
I
instantaneous
short time
Long time + Short time
+ Instantaneous
test
tg
.4 .4 .3
.2
.3
.1
.2
.1 2 0
(s)
on
I t
Earth-fault protection
off
ground fault
Micrologic 7.0 A: selective + earth-leakage protection and
ammeter
Micrologic 7.0 A
t
E51452A
E51354A
Y: version number
identification of the control-unit generation.
"0" signifies the first generation.
t
100 %
E51388A
E51450A
setting
t
100 %
40 %
menu
long time
Ir
.7
.6
.5
.4
.8
x In
0
alarm
tr
8
(s) 4
.9
12
16
.95 2
.98 1
20
24
1
.5
Ir
Isd
Ii
I
0
I∆n
I
at 6 Ir
short time
Isd
4 5
3
6
2.5
8
2
1.5
10
x Ir
tsd
.4 .4 .3
.2
.3
.1
.2
.1 2 0
Ii
instantaneous
(s)
setting
on
I t
off
delay
6
8
4
3
2
x In
10
12
15
off
test
I∆n 5 7 ∆I 230 350
3
10
2
140
20
1
800
60
30
.5
Long time + Short time
+ Instantaneous
Earth-leakage protection
earth leakage
2
Micrologic A
Schneider Electric
E51390A
top fastener
bottom fastener
protective cover
cover opening point
lead-seal fixture for protective cover
long-time rating plug
screw for long-time rating plug
connection with circuit breaker
infrared link with communications interfaces
terminal block for external connections
housing for battery
digital display
three-phase bargraph and ammeter
1
10
0A
7.
logic
Micro
31
12
11
13
30
7
40 %
29
alarm
menu
time
long
.8 .9
.7
.95
.6
.98
.5
1
.4 x In
Ir
Adjustment dials
3
8
2
Micrologic 7.0 A
14
15
Micrologic 7.0 A
31
LED indicating long-time tripping
LED indicating short-time tripping
LED indicating earth-fault
or earth-leakage tripping
LED indicating auto-protection tripping
LED indicating an overload
18
tr
.8
.7
.6
.5
.4
(s) 4
.9
.95 2
.98 1
1
.5
x In
8
7
alarm
12
16
20
24
at 6 Ir
instantaneous
Isd
3 4 5
6
8
10
2.5
2
1.5
x Ir
setting
12
33
13
100 %
navigation button to change menus
navigation button to view menu contents
button for fault-trip reset and battery test
Micrologic 5.0 A
40 %
28
long time
14
14
15
Ir
.7
.6
.5
.4
8
(s) 4
.9
12
16
.95 2
.98 1
20
24
1
.5
.8
x In
at 6 Ir
17
on
setting
3
2
1
.5
5
I t
off
7
(ms)
230
10
140
20
30
60
earth leakage
23
Ii
6
8
4
3
2
10
12
15
off
19
test
32
x In
delay
∆I
I∆n
(A)
22
.4 .4 .3
.2
.3
.1
.2
.1 2 0
(s)
8
(s) 4
.9
12
16
.95 2
.98 1
20
24
1
.5
.8
x In
7
alarm
tr
at 6 Ir
instantaneous
short time
Isd
3 4 5
6
2.5
8
2
1.5
10
x Ir
tsd
. 4 .4 .3
.2
.3
.1
.2
.1 2 0
(s)
on
setting
I t
Ii
4
3
6 8 10
12
15
off
2
x In
delay
19
instantaneous
tsd
Isd
3 4 5
6
2.5
8
2
10
1.5
x Ir
.7
.6
.5
.4
17
7
short time
16
16
28
alarm
tr
Ir
15
30
menu
long time
test button for earth-fault and earth-leakage
protection
test connector
28
long time
Ir
29
33
Micrologic 2.0 A
24 25 26 27
Test
32
at
6 Ir
4
Navigation
29
30
31
8 12
16
20
24
E51393A
27
28
.5
6
Indications
24
25
26
4
2
1
E51394A
long-time current setting Ir
long-time tripping delay tr
short-time pickup Isd
short-time tripping delay tsd
instantaneous pick-up Isd
instantaneous pick-up Ii
earth-fault pick-up Ig
earth-fault tripping delay tg
earth-leakage pick-up I∆n
earth-leakage tripping delay ∆t
tr
(s)
5
E51391A
14
15
16
17
18
19
20
21
22
23
9
100 %
33
350
800
Micrologic 6.0 A
33
E51392A
1
2
3
4
5
6
7
8
9
10
11
12
13
E51389A
Presentation
15
14
17
16
21
20
long time
Ir
.7
.6
.5
.4
x In
7
at 6 Ir
instantaneous
short time
Isd
4
5
3
2.5
6
2
8
1.5
10
x Ir
tsd
.4 .4 .3
.2
.3
.1
.2
.1 2 0
D
C
B
A
E
on
I t
off
delay
6
4
3
2
8
10
12
15
off
x In
test
tg
F
G
H
I
Ii
(s)
setting
Ig
28
alarm
tr
8
(s) 4
.9
12
16
.95 2
.98 1
20
24
1
.5
.8
.4 .4 .3
.2
.3
.1
.2
.1 2 0
19
32
(s)
on
I t
33
off
ground fault
3
Micrologic A
Schneider Electric
Overview of functions
Current protection
Discovering your
control unit
Protection settings
Depending on the type of installation, it is possible to set the tripping curve of your
control unit using the parameters presented below.
E51358A
Micrologic 2.0 A
t
1
2
3
0
Ir
Isd
I
1. current setting Ir (long time)
2. tripping delay tr (long time) for 6 x Ir
3. pick-up Isd (instantaneous)
Micrologic 7.0 A
1
2
t
t
I t on
E51396A
t
Micrologic 6.0 A
E51386A
E51359A
Micrologic 5.0 A, 6.0 A,
7.0 A
2
I t on
2
2
I t off
2
4
1
I t off
1
3
2
2
5
Ir
0
Isd
Ii
I
0
Ig
I
1. pick-up Ig (earth fault)
2. tripping delay tg
(earth fault)
1. current setting Ir
(long time)
2. tripping delay tr
(long time) for 6 x Ir
3. pick-up Isd (short time)
4. tripping delay tsd
(short time)
5. pick-up Ii
(instantaneous)
0
I∆n
I
1. pick-up I∆n
(earth leakage)
2. tripping delay ∆t
(earth leakage)
Long-time protection
The long-time protection function protects cables (phases and neutral)
against overloads. This function is based on true rms measurements.
Thermal memory
The thermal memory continuously accounts for the amount of heat in the cables,
both before and after tripping, whatever the value of the current (presence of
an overload or not). The thermal memory optimises the long-time protection
function of the circuit breaker by taking into account the temperature rise in the
cables. The thermal memory assumes a cable cooling time of approximately
15 minutes.
Long-time current setting Ir and standard tripping delay tr
Micrologic control unit
current setting
tripping between
1.05 and 1.20 x Ir
time delay (s)
accuracy:
0 to -20 %
2.0 A and 5.0 A
Ir = In x …(*)
0.4
0.5
0.6
0.7
0.8
0.9
0.95
other ranges or disable by changing rating plug
0.98
1
tr at 1.5 x Ir
tr at 6 x Ir
tr at 7.2 x Ir
12.5
0.5
0.34
500
20
13.8
600
24
16.6
25
1
0.69
50
2
1.38
100
4
2.7
200
8
5.5
300
12
8.3
400
16
11
* In: circuit breaker rating
Setting accuracy of the Ir setting may be enhanced by using a different long-time
rating plug.
See the technical appendix "Changing the long-time rating plug".
4
Micrologic A
Schneider Electric
For the characteristics and external wiring
of the zone selective interlocking function,
see the technical appendix on
"Zone selective interlocking".
The portable test kit can be used to test
the wiring between circuit breakers
for the zone selective interlocking function.
Short-time protection
c the short-time protection function protects the distribution system against
impedant short-circuits
c the short-time tripping delay can be used to ensure discrimination with a
downstream circuit breaker
c this function carries out true rms measurements.
c the I2t ON and I2t OFF options enhance discrimination with downstream
protection devices
c use of I2t curves with short-time protection:
v I2t OFF selected: the protection function implements a constant time curve;
v I2t ON selected: the protection function implements an I2t inverse-time
curve up to 10 Ir. Above 10 Ir, the time curve is constant.
c zone selective interlocking (ZSI)
The short-time and earth-fault protection functions enable time discrimination
by delaying the upstream devices to provide the downstream devices the time
required to clear the fault. Zone selective interlocking can be used to obtain total
discrimination between circuit breakers using external wiring.
Short-time pick-up Isd and tripping delay tsd
Micrologic control unit
pick-up
accuracy ± 10 %
time delay
(ms) at 10 Ir
I2t ON or
I2t OFF
2.0 A, 5.0 A, 6.0 A and 7.0 A
Isd = Ir x …
1.5
2
2.5
3
4
settings I2t OFF
I2t ON
tsd (max resettable time)
tsd (max break time)
0
0.1
0.1
80
140
0.2
0.2
140
200
0.3
0.3
230
320
0.4
0.4
350
500
20
80
5
6
8
10
Instantaneous protection
c the instantaneous-protection function protects the distribution system
against solid short-circuits. Contrary to the short-time protection function,
the tripping delay for instantaneous protection is not adjustable.
The tripping order is sent to the circuit breaker as soon as current exceeds
the set value, with a fixed time delay of 20 milliseconds.
c this function carries out true rms measurements.
Instantaneous pick-up Isd
Micrologic control unit
pick-up
accuracy ± 10 %
Isd = Ir x …
2.0 A
1.5
2
2.5
3
4
5
6
8
10
10
12
15
OFF
Instantaneous pick-up Ii
Micrologic control unit
pick-up
accuracy ± 10 %
li = In x … (*)
5.0 A, 6.0 A and 7.0 A
2
3
4
6
8
* In: circuit-breaker rating
5
Micrologic A
Schneider Electric
Discovering your
control unit
Overview of functions
Current protection
Protection of the fourth pole on four-pole circuit breakers
Protection of the neutral conductor depends on the distribution system.
There are three possibilities.
Type of neutral
Neutral unprotected
Neutral protection
at 0.5 In
Neutral protection
at In
Description.
The distribution system does not require protection
of the neutral conductor.
The cross-sectional area of the neutral conductor
is half that of the phase conductors.
c the long-time current setting Ir for the neutral is equal
to half the setting value
c the short-time pick-up Isd for the neutral is equal
to half the setting value
c the instantaneous pick-up Isd (Micrologic 2.0 A)
for the neutral is equal to half the setting value
c the instantaneous pick-up Ii (Micrologic 5.0 A / 6.0 A /
7.0 A) for the neutral is equal to the setting value.
The cross-sectional area of the neutral conductor is equal
to that of the phase conductors.
c the long-time current setting Ir for the neutral is equal
to the setting value
c the short-time pick-up Isd for the neutral is equal to
the setting value
c the instantaneous pick-ups Isd and Ii for the neutral
are equal to the setting value.
Earth-fault protection on Micrologic 6.0 A
c an earth fault in the protection conductors can provoke local temperature rise
at the site of the fault or in the conductors.
The purpose of the earth-fault protection function is to eliminate this type of fault.
c there are two types of earth-fault protection.
Type
Description
Residual
Source Ground Return
c the function determines the zero-phase sequence
current, i.e. the vectorial sum of the phase and neutral
currents
c it detects faults downstream of the circuit breaker.
c using a special external sensor, this function
directly measures the fault current returning
to the transformer via the earth cable
c it detects faults both upstream and downstream
of the circuit breaker
c the maximum distance between the sensor
and the circuit breaker is ten metres.
c earth-fault and neutral protection are independent and can therefore be
combined.
Earth-fault pick-up Ig and tripping delay tg
The pick-up and tripping-delay values can be set independently and are identical
for both the residual and "source ground return" earth-fault protection functions.
Micrologic control unit
pick-up
accuracy
± 10 %
time delay
(ms) at 10 In (*)
I2t ON or
I2t OFF
Ig = In x … (*)
In ≤ 400 A
400 A < In ≤ 1200 A
In > 1200 A
settings I2t OFF
I2t ON
tg (max resettable time)
tg (max break time)
6.0 A
A
0.3
0.2
500 A
0
20
80
B
0.3
0.3
640 A
0.1
0.1
80
140
C
0.4
0.4
720 A
0.2
0.2
140
200
D
0.5
0.5
800 A
0.3
0.3
230
320
E
0.6
0.6
880 A
0.4
0.4
350
500
F
0.7
0.7
960 A
G
0.8
0.8
1040 A
H
0.9
0.9
1120 A
I
1
1
1200 A
* In: circuit-breaker rating
6
Micrologic A
Schneider Electric
Current protection and alarms
Earth-leakage protection on Micrologic 7.0 A
c the earth-leakage protection function primarily protects people against indirect
contact because an earth-leakage current can provoke an increase in the potential
of the exposed conductive parts. The earth-leakage pick-up value I∆n is displayed
directly in amperes and the tripping delay follows a constant-time curve
c an external rectangular sensor is required for this function
c this function is inoperative if the long-time rating plug is not installed
c d protected against nuisance tripping.
c k DC-component withstand class A up to 10 A.
Pick-up value I∆n and tripping delay ∆t
Micrologic control unit
pick-up
accuracy
0 to - 20 %
time delay
(ms)
7.0 A
I∆n
0.5
1
2
3
5
7
settings
∆t (max resettable time)
∆t (max break time)
60
140
140
200
230
320
350
500
800
1000
10
20
30
E51398A
Overload LED
long time
Ir
.7
.6
.5
.4
alarm
tr
8
(s) 4
.9
12
16
.95 2
.98 1
20
24
1
.5
.8
x In
at 6 Ir
instantaneous
short time
Isd
4
5
3
2.5
6
2
8
1.5
10
x Ir
tsd
.4 .4 .3
.2
.3
.1
.2
.1 2 0
(s)
on
3
2
1
.5
4
3
I t
delay
setting
5
(ms)
7
230
10
140
20
30
60
100 %
6 8 10
12
15
2
off
x In
test
∆t
I∆n
(A)
Ii
40 %
350
800
earth leakage
This LED signals that the long-time current setting Ir has been overrun.
The auto-protection function (excessive
temperature or short-circuit higher than
circuit-breaker capacity) opens the circuit
breaker and turns on the Ap LED.
Micrologic 7.0 A
Signals tripping due
to an overrun of the
short-time pick-up Isd
or the instantaneous
pick-up Isd / Ii.
E51400A
Signals tripping due to an
overrun of the long-time
current setting Ir.
E51399A
Caution.
If the circuit breaker remains closed and
the Ap LED remains on, contact the
Schneider after-sales support department.
Fault indications
Micrologic 7.0 A
Caution.
The battery maintains the fault indications.
If there are no indications, check the
battery.
Micrologic 7.0 A
7
Micrologic A
Signals tripping due to
the auto-protection
function of the control
unit.
E51402A
E51401A
Signals tripping due to an
overrun of the earth-fault
pick-up Ig or the earthleakage pick-up I∆n.
Micrologic 7.0 A
Schneider Electric
Overview of functions
Ammeter measurements
If no information is displayed on the screen,
see the technical appendix "Digital display".
c all Micrologic control units measure the true rms value of currents
c the most heavily loaded phase is continuously displayed on the digital screen
c using the navigation buttons, it is possible to display successively the I1, I2, I3,
neutral IN, Ig, I∆N and stored-current (maximeter) values
c the percent load on each phase is displayed. A bargraph displays the currents
measured on phases 1, 2 and 3 as a percentage of the long-time current setting Ir.
E60371A
Discovering your
control unit
1.125 x Ir
1 x Ir
0.8 x Ir
0.6 x Ir
0.4 x Ir
100 %
40 %
8
Micrologic A
Schneider Electric
9
Micrologic A
Schneider Electric
Selecting the type
of neutral protection
Setting your control unit
E51383A
On four-pole circuit breakers, it is possible to select the type of neutral protection
for the fourth pole:
c neutral unprotected (4P 3D);
c neutral protection at 0.5 In (3D + N/2);
c neutral protection at In (4P 4D).
/2
3D+N
4P 4D
4P 3D
10
Micrologic A
Schneider Electric
Setting procedure
Setting procedure
E51410A
E51411A
1. Open the protective cover.
Micro
logic
7.0 A
Micro
100 %
100 %
40 %
40 %
menu
E51412A
7.0 A
Ir=
menu
1
gic 7.0
logic
2
A
2. Select the desired
setting.
The set value is
automatically displayed
on the digital screen in
absolute value with the
relevant units.
c Current in amperes
(A and kA);
c Tripping delays in
seconds.
3. If no information is displayed, see the technical
appendix "Digital display". If no further action is taken,
after a few seconds, the display returns to the main
menu for current measurements.
A
Microlo
4. Close the protective cover and, if necessary, install
a lead seal to protect the settings.
100 %
40 %
menu
3
See the user manual for the portable
test kit
Using the portable test kit
E51413A
E51410A
To test the control unit, connect the portable test kit via the test connector.
Micro
logic
7.0 A
Micro
100 %
100 %
40 %
40 %
menu
1
logic
7.0 A
menu
2
11
Micrologic A
Schneider Electric
The rating of the circuit breaker
in this example is 2000 A.
Set the threshold values
E60365A
Setting the Micrologic 2.0 A
control unit
E51366A
Setting your control unit
long time
Ir
.7
.6
.5
.4
alarm
.8
x In
.9
.95
.98
1
In = 2000 A
Ir = 0.7 x In = 1400 A
Isd = 3 x Ir = 4200 A
instantaneous
Isd
3 4 5
2.5
6
2
8
10
1.5
x Ir
1
setting
In = 2000 A
See pages 4 and 5 for information
on the available settings
E51368A
A
t
Ir
Isd
0
I
Set the tripping delay
E60366A
2000
long time
tr
(s)
4
2
1
.5
E51370A
In =
8
alarm
tr = 1 second
12
16
20
24
at 6 Ir
t
tr
0
12
I
Micrologic A
Schneider Electric
Setting the Micrologic 5.0 A
control unit
Set the threshold values
E51366A
E60367A
The rating of the circuit breaker
in this example is 2000 A.
In = 2000 A
long time
alarm
Ir
.8 .9
.95
.6
.98
.5
.4
1
x In
.7
Ir = 0.7 x In = 1400 A
Isd = 2 x Ir = 2800 A
instantaneous
short time
Isd
6 8 10
4
12
3
15
2
off
x In
6
8
10
2.5
2
1.5
x Ir
1
Ii = 3 x In = 6000 A
Ii
4 5
3
setting
In = 2000 A
In =
2000
A
See pages 4 and 5 for information
on the available settings
E60368A
Set the tripping delay
Thresholds
E51372A
E51373A
tr
Ir
t
8 12
16
2
1
20
24
.5
(s)
I2t OFF curve
I2t ON curve
t
long time
Ir
alarm
tr = 1 second
4
at 6 Ir
tsd = 0.2 seconds
short time
tsd
.4 .4 .3
.2
.3
.2
.1
.1 2 0
(s)
Isd
Isd
Ii
I
0
on
Ii
I2t on
I2t off
I t
delay
I
0
Tripping delays
I2t OFF curve
E51375A
E51376A
I2t ON curve
t
t
tr
tr
tsd
0
tsd
I
0
I
13
Micrologic A
Schneider Electric
Setting the Micrologic 6.0 A
control unit
The rating of the circuit breaker
in this example is 2000 A.
Set the threshold values
E51366A
E51414A
Setting your control unit
long time
Ir
.7
.6
.5
.4
.8
x In
Ir = 0.7 x In = 1400 A
short time
Isd
3 4 5
6
2.5
2
8
1.5
10
x Ir
1
In = 2000 A
alarm
.9
.95
.98
1
Ii
instantaneous
4
3
6 8 10
12
15
2 x In off
setting
D E F
A
A
B
G
H
C
B
In = 2000 A
2000
Ii = 3 x In = 6000 A
test
Ig
In =
Isd = 2 x Ir = 2800 A
Ig = 640 A
I
ground fault
See pages 4 to 6 for information
on the available settings.
E60372A
Set the tripping delay
Thresholds
t
tr
(s) 4
I2t OFF curve
E51372A
E51373A
I2t ON curve
long time
Ir
t
8
2
1
.5
Ir
alarm
12
16
20
24
tr = 1 second
at 6 Ir
short time
tsd
.4 .4 .3
.2
.3
.1
.2
.1 2 0
tsd = 0.2 seconds
(s)
Isd
Isd
E51415A
E51416A
t
I t
tg
I
(s)
on
2
I t
I2t off
test
.4 .4 .3
.3
.2
.1
t
I2t on
off
delay
0
I
0
on
Ii
Ii
.2
.1
0
off
tg = 0.2 seconds
ground fault
Ig
Ig
0
I
0
I
Tripping delays
I2t OFF curve
E51375A
E51376A
I2t ON curve
t
t
tr
tr
tsd
0
I
E51418A
E51419A
0
tsd
t
t
tg
tg
0
I
I
0
I
14
Micrologic A
Schneider Electric
Setting the Micrologic 7.0 A
control unit
Set the threshold values
E51366A
E51420A
The rating of the circuit breaker
in this example is 2000 A.
long time
Ir
.7
.6
.5
.4
alarm
.8 .9
In = 2000 A
.95
.98
x In
Ir = 0.7 x In = 1400 A
1
short time
Isd
3 4 5
6
2.5
2
8
1.5
10
x Ir
1
6 8 10
4
12
3
15
off
2
x In
Isd = 2 x Ir = 2800 A
Ii = 3 x In = 6000 A
I∆n = 1 A
test
3 5 7
2
1
.5
In = 2000 A
2000
instantaneous
setting
I∆n
(A)
In =
Ii
10
20
30
A
ground fault
See pages 4 to 7 for information
on the available settings.
E60373A
Set the tripping delay
Thresholds
t
tr
4 8 12
16
2
20
1
24
.5
tr = 1 second
alarm
(s)
I2t OFF
curve
E51372A
E51373A
I2t ON
long time
Ir
t
curve
Ir
at 6 Ir
short time
tsd = 0.2 seconds
tsd
.4 .4 .3
.2
.3
.1
.2
.1 2 0
(s)
Isd
Isd
on
Ii
Ii
I
E51421A
0
(ms) 230
I
0
off
I t
delay
∆t
I2t on
I2t off
test
350
140
t
60
800
∆t = 140 milliseconds
ground fault
I∆n
0
I
Tripping delays
I2t OFF curve
E51375A
E51376A
I2t ON curve
t
t
tr
tr
tsd
E51423A
0
tsd
I
0
I
t
∆t
0
I
15
Micrologic A
Schneider Electric
Fault and status
indications
Resetting the fault indications
and checking battery status
The procedure for closing the circuit
breaker following a fault trip is presented
in the circuit-breaker user manual.
Resetting the fault indications
E51439A
c determine why the circuit breaker tripped.
The fault indication is maintained until it is reset on the control unit.
v press the fault-trip reset button.
Micrologic 7.0 A
v check the parameter settings of the control unit.
E51440A
Checking the battery
Micrologic 7.0 A
E51441A
Press the battery-test button (same as the fault-trip reset button) to display
the battery status.
Battery fully charged
Battery half charged
Change the battery
If no information is displayed, either:
c no battery is installed in the control unit, or;
c an auxiliary power supply is required.
See the technical appendix "Digital display".
Changing the control-unit battery
1. Remove the battery
cover.
E51442A
E51443A
2. Remove the battery.
100 %
40 %
3. Insert a new battery.
Check the polarity.
4. Put the cover back in
place. Press the batterytest button to check the
new battery.
E51445A
E51444A
If the battery needs to be changed, please
use the one with Schneider catalogue
number 33593 (characteristics given on the
battery compartment cover).
+
100 %
40 %
16
Micrologic A
Schneider Electric
Testing the earth-fault and earthleakage functions
E51456A
E51410A
Charge and close the circuit breaker.
Using a screwdriver, press the test button for earth-fault and earth-leakage
protection. The circuit breaker should open.
Micro
logic
7.0 A
7.0
logic
Micro
100 %
100 %
40 %
40 %
menu
1
A
menu
2
If the circuit breaker does not open, contact the Schneider after-sales
support department.
17
Micrologic A
Schneider Electric
Accessing the menus
Symbols used:
Three menus may be accessed on Micrologic control units, providing the following
information:
c phase current measurements I1, I2, I3, neutral IN, earth-fault current Ig on the
Micrologic 6.0 A control unit and earth-leakage current I∆n on the Micrologic 7.0 A
control unit;
c maximeter current values for phases I1, I2, I3, neutral IN, the maximum earthfault current Ig on the Micrologic 6.0 A control unit and the maximum earth-leakage
current I∆n on the Micrologic 7.0 A control unit;
c protection settings and tripping delays.
E51405A
Briefly press a key.
2. Maximeter
E51407A
Press and hold a key.
E51406A
1. Measurements
Max
A
It is possible at any time to stop consulting
a current measurement, a maximum
current value recorded by the maximeter or
the setting values. After a few seconds, the
Micrologic control unit automatically returns
to the main menu displaying the current
value of the most heavily loaded phase.
100 %
40 %
40 %
menu
Press the "menu" button
to access the maximum
current values measured
by the maximeter.
Ir=
A
100 %
menu
The protection settings can be displayed
directly on the digital display.
3. Settings
E51408A
E51404A
Menus
Press the "menu" button
to access the protection
settings and tripping
delays.
A
100 %
40 %
menu
Press the "menu" button
to return to the current
measurements.
E51409A
4. The system returns
to the main
"Measurements" menu.
A
100 %
40 %
18
Micrologic A
Schneider Electric
Measuring phase currents
Display of current I1.
Display of current I2.
E51426A
E51425A
Current values may be read in the
"Measurements" menu, which is also the
main menu.
A
A
If no particular action is taken, the system
displays the current value of the most
heavily loaded phase.
100 %
100 %
40 %
40 %
E51409A
"Measurements" menu
Phase 1 is the most heavily loaded.
A
100 %
Press the "arrow" button
to go on to current I3.
Display of current I3.
Display of current IN.
E51429A
E51427A
40 %
Press the "arrow" button
to go on to current I2.
A
A
100 %
100 %
40 %
40 %
Press the "arrow" button
to go on to the earth-fault
current Ig or the earthleakage current I∆n.
Display of current Ig
(Micrologic 6.0 A) or
current I∆n
(Micrologic 7.0 A).
The system returns to
the display of current I1.
E51409A
E51428A
Press the "arrow" button
to go on to current IN if
the circuit breaker is
connected to the neutral.
A
A
100 %
100 %
40 %
40 %
Press the "arrow" button
to return to current I1.
19
Micrologic A
Schneider Electric
Displaying the maximum
current values
Maximum current values may be read in
the "Maximeter" menu.
Display of the
maximum I1 current.
MAX
If no particular action is taken, the system
returns to the main menu.
Display of the
maximum I2 current.
E51431A
E51430A
Menus
MAX
A
A
E51407A
"Maximeter" menu.
Max
100 %
100 %
40 %
40 %
A
100 %
Press the "arrow" button
to go on to the maximum
I2 current.
Press the "arrow" button
to go on to the maximum
I3 current.
Display of the
maximum I3 current.
Display of the
maximum IN current.
E51432A
E51434A
40 %
menu
MAX
MAX
A
A
100 %
100 %
40 %
40 %
Display of the maximum
Ig current or the
maximum I∆n current.
The system returns to
the display of the
maximum I1 current.
E51435A
Press the "arrow" button
to go on to the maximum
earth-fault current Ig
(Micrologic 6.0 A) or the
maximum earth-leakage
current I∆n
(Micrologic 7.0 A)
E51433A
Press the "arrow" button
to go on to the maximum
IN current if the circuit
breaker is connected to
the neutral.
MAX
MAX
A
A
100 %
100 %
40 %
40 %
Press the "arrow" button
to return to the maximum
I1 current.
20
Micrologic A
Schneider Electric
Resetting the maximum current
values
MAX
E51438A
E51436A
If no particular action is taken, the system
returns to the main menu.
Select another value
to reset or return to
the main menu.
Reset.
E51437A
Select the maximum
current value to be
reset (e.g. I2 max.).
Maximum current values can be reset
using the "Maximeter" menu.
MAX
MAX
A
A
A
E51407A
"Maximeter" menu.
Max
A
100 %
100 %
100 %
40 %
40 %
40 %
100 %
40 %
menu
Press the "arrow" button
as many times as
required to select I2 max.
21
Micrologic A
Press and hold the
"arrow" button down for
three to four seconds.
The current value flashes
during the reset, then
changes to the present
value (the new
maximum).
Press the "arrow" button
as many times as
required to select another
maximum value to reset
or return to the main
menu.
Schneider Electric
Menus
Viewing the settings
Micrologic control unit
E60374A
2.0 A 5.0 A 6.0 A 7.0 A
Long-time current setting Ir
menu
Long-time tripping delay tr
Select the "Settings"
menu.
The Ir value is the first
displayed.
Ir=
Press the "arrow" button
to go on to the tr value.
Press the "arrow" button
to go on to the
short-time Isd value.
Short-time pick-up Isd
tr=
A
s
Isd=
A
Short-time tripping delay tsd
Instantaneous pick-up Isd
Press the "arrow" button
to go on to the tsd
value.
tsd=
Press the "arrow" button
to go on to the
instantaneous Isd
value.
Isd=
s
A
Or
Instantaneous pick-up Ii
the instantaneous Ii
value.
Ii=
Earth-fault pick-up Ig
A
Press the "arrow" button
to go on to the Ig value.
Ig=
A
Or
Earth-leakage pick-up I∆n
the I∆n value.
I∆n=
A
Earth-fault tripping delay tg
Press the "arrow" button
to go on to the tg value.
s
tg=
Or
Earth-leakage tripping delay ∆t
the ∆t value.
∆t=
s
Press the "arrow" button
to return to the
beginning of the menu.
22
Micrologic A
Ir=
A
Schneider Electric
23
Micrologic A
Schneider Electric
Tripping curves
Technical appendix
E60369A
Long-time and instantaneous protection (Micrologic 2.0 A)
10 000
5 000
Ir = 0.4…1 x In
2 000
1 000
500
200
100
tr = 0.5…24 s
50
20
10
5
t(s)
2
Isd = 1.5…10 x Ir
1
.5
.2
.1
.05
.02
.01
.005
.002
.001
.5 .7 1
2
3 4 5 7 10
20 30
50 70 100
200 300
I / Ir
E60370A
Long-time, short-time and instantaneous protection
(Micrologic 5.0 A, 6.0 A and 7.0 A)
10 000
5 000
Ir = 0.4…1 x In
2 000
1 000
tr = 0.5…24 s
500
200
100
50
20
10
5
t(s)
Isd = 1.5…10 x Ir
2
1
I2t ON
.5
0.4
0.3
.2
0.2
0.1
.1
.05
.02
.01
0.4
0.3
I2t OFF
0
0.2
0. 1
0
Ii = 2…15 x In . OFF (1)
.005
.002
.001
.5 .7 1
24
Micrologic A
2
3 4 5 7 10
x Ir
20
3
5
7 10
x In
20 30
Schneider Electric
E46266A
Earth-fault protection (Micrologic 6.0 A)
10 000
5 000
2 000
Ig = A…J x In (1)
1200 A max.
1 000
500
200
100
50
20
10
5
t(s)
I2t ON
2
1
.5
.2
.1
.05
2
It
0.4
0.4
0.3
0.2
0.1
0.3
0.2
0.1
OFF
0
0
.02
.01
.005
.002
.001
.05.07 .1
.2 .3 .4 .5 .7 1
2
3
5
7 10
200 300
I / In
25
Micrologic A
Schneider Electric
Changing the long-time
rating plug
Technical appendix
Select the long-time rating plug
A number of setting ranges for the long-time current setting are available on
Micrologic A control units by changing the long-time rating plug.
The available rating plugs are listed below.
Caution.
Following any modifications to the longtime rating plug, all control-unit protection
parameters must be checked.
Part number
Setting range for the Ir value
33542
33543
33544
33545
standard
low setting
high setting
without long-time protection
0.4 to 1 x Ir
0.4 to 0.8 x Ir
0.8 to 1 x Ir
Change the long-time rating plug
Proceed in the following manner.
1. Open the circuit breaker.
3. Completely remove
the long-time rating plug screw.
E51379A
E51378A
2. Open the protective
cover of the control unit.
7.0
logic
Micro
A
logic
100 %
100 %
40 %
40 %
menu
menu
5. Clip in the new rating plug.
E51381A
4. Snap out the rating
plug.
E51380A
Caution.
If no long-time rating plug is installed, the
control unit continues to operate under the
following downgraded conditions:
c the long-time current setting Ir is 0.4;
c the long-time tripping delay tr
corresponds to the value indicated by the
adjustment dial;
c the earth-leakage protection function is
disabled.
7.0 A
Micro
logic
7.0 A
logic
7.0 A
Micro
Micro
100 %
100 %
40 %
40 %
menu
menu
alarm
alarm
long
time
.8 .9
.7
.95
.6
.98
.5
1
.4 x In
Ir
tr
(s)
2
1
4
8 12
16
20
24
.5 @ 6 Ir
6. Refit the screw for the
long-time rating plug.
26
Micrologic A
long
time
.8 .9
.7
.95
.6
.98
.5
1
.4 x In
Ir
tr
(s)
2
1
4
8 12
16
20
24
.5 @ 6 Ir
7. Check and/or modify the
control-unit settings.
Schneider Electric
E51397A
Zone selective interlocking (ZSI)
Operating principle
1
c A fault occurs at point A.
Downstream device no. 2 clears the fault and sends a signal to upstream device
no. 1, which maintains the short-time tripping delay tsd or the earth-fault tripping
delay tg to which it is set.
c A fault occurs at point B.
Upstream device no. 1 detects the fault. In the absence of a signal from a
downstream device, the upstream device immediately trips without taking into
account its tripping-delay settings. If it is connected to a device even further
upstream, it sends a signal to that device, which delays tripping according to its tsd
or tg setting.
B
2
Note :
On a circuit breaker likely to receive a ZSI signal, the tsd and tg tripping delays must not
be set to zero, as this would make discrimination impossible.
A
Connections between control units
A logic signal (0 or 5 volts) can be used for zone selective interlocking between the
upstream and downstream circuit breakers.
c Micrologic 5.0 A, 6.0 A, 7.0 A.
c Micrologic 5.0 P, 6.0 P, 7.0 P.
c Micrologic 5.0 H, 6.0 H, 7.0 H.
Caution.
If the protection function is not used on
circuit breakers equipped for ZSI
protection, a jumper must be installed to
short terminals Z3, Z4 and Z5.
If the jumper is not installed, the short-time
and earth-fault tripping delays are set
to zero, whatever the position of the
adjustment dial.
c maximum impedance: 2.7 Ω / 300 metres
c capacity of connectors: 0.4 to 2.5 mm2
c maximum cross-sectional area of wires (including insulation): 3.5 mm2
c wires: single or multicore
c maximum length: 3000 metres
c limits to device interconnection:
v the common ZSI - OUT - SOURCE (Z1) and the output ZSI - OUT (Z2)
can be connected to a maximum of 10 inputs;
v a maximum of 100 devices may be connected to an input ZSI IN CR (Z4) or GF
(Z5)
c connections are made from the output ZSI - OUT (Z2) on the downstream device
to the input(s) ZSI - IN - ST (Z4) and/or GF (Z5) on the upstream device.
E60375A
Terminals Z1 to Z5 correspond to the
identical indications on the circuit-breaker
terminal blocks.
Wiring
and/or
Z1 Z2 Z3 Z4 Z5
Terminal block
for external
connections
Upstream
circuit breaker
and/or
Z1 Z2 Z3 Z4 Z5
Terminal block
for external
connections
Z1 Z2 Z3 Z4 Z5
Terminal block
for external
connections
Downstream
circuit breaker
27
Micrologic A
Schneider Electric
Technical appendix
Digital display
For information on connecting an external
power supply, see the electrical diagrams
in the circuit-breaker user manual.
c display of measurements operates without an external power supply.
The digital display goes off if the current drops below 0.2 x In (In = rated current).
c display back-lighting is disabled in the following situations:
v current less than 1 x In on one phase;
v current less than 0.4 x In on two phases;
v current less than 0.2 x In on three phases.
c the maximeter does not operate for currents under 0.2 x In.
These three functions may be maintained by adding an external power supply.
Even if an external power supply is installed, the long-time, short-time,
instantaneous and earth protection functions will not use it.
28
Micrologic A
Schneider Electric
Thermal memory
Thermal memory
The thermal memory is a means to simulate temperature rise and cooling caused
by changes in the flow of current in the conductors.
These changes may be caused by:
c repetitive motor starting;
c loads fluctuating near the protection settings;
c repeated circuit-breaker closing on a fault.
Control units without a thermal memory (contrary to bimetal strip thermal
protection) do not react to the above types of overloads because they do not last
long enough to cause tripping. However, each overload produces a temperature
rise and the cumulative effect can lead to dangerous overheating.
Control units with a thermal memory record the temperature rise caused by each
overload. Even very short overloads produce a temperature rise that is stored in
the memory.
This information stored in the thermal memory reduces the tripping time.
Micrologic control units and thermal memory
All Micrologic control units are equipped as standard with a thermal memory
c for all protection functions, prior to tripping, the temperature-rise and cooling time
constants are equal and depend on the tripping delay in question:
v if the tripping delay is short, the time constant is low;
v if the tripping delay is long, the time constant is high.
c for long-time protection, following tripping, the cooling curve is simulated by the
control unit. Closing of the circuit breaker prior to the end of the time constant
(approximately 15 minutes) reduces the tripping time indicated in the tripping
curves.
29
Micrologic A
Schneider Electric
Schneider Electric Industries SA
5, rue Nadar
92506 Rueil-Malmaison Cedex
France
Tel: +33 (0)1 41 29 82 00
Fax:+33 (0)1 47 51 80 20
As standards, specifications and designs develop from time, always ask for confirmation of the
information given in this publication.
This document has been printed on ecological paper.
Designed by: HeadLines
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