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MicrologicControl units2.0, 5.0 and 6.0
Low voltage electrical distribution
User manual04/2010
MicrologicControl units 2.0, 5.0 and 6.0
�04443722AA - 04/20�0
Contents
Discovering your control unit 2Identifying your control unit 2Overview of functions 4
Setting your control unit 8Setting procedure 8Setting the Micrologic 2.0 control unit 9Setting the Micrologic 5.0 control unit �0Setting the Micrologic 6.0 control unit ��
Fault and status indications 12Resetting the fault indications and checking battery status on Micrologic 6.0 �2Testing the control unit �3
Technical appendix 14Tripping curves �4Changing the long-time rating plug �6Thermal memory �7
2 04443722AA - 04/20�0
Discovering your control unit
DB
�289
53
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.
Identifying your control unitDesignations
X: type of protection 2 for basic protection5 for selective protection6 for selective + earth-fault protection 7 for selective + earth-leakage protection.
Y: version number Identification of the control-unit generation."0" signifies the first generation.
Z: type of measurementA for "ammeter"P for "power meter"H for "harmonic meter"no indication = no measurements.
bbbb
bbbb
Micrologic 2.0
YX
Z
Micrologic 2.0: basic protection
E5�
266B Micrologic 2.0
.4.5.6
.7.8
.9.95.98
1
x Ir
22.5
3 4 56
8101.5
setting
Isd
.512
48
121620
instantaneous
long timealarmIr tr
(s)
x In at 6 Ir24
DB
1193
96
0 Ir Isd I
t
Long time + Instantaneous
Micrologic 5.0: selective protection
E51
353A
Micrologic 5.0
setting delay
short timeI itsd
(s)
long timealarm
x In
34
68
101215
off2
.4.5.6
.7.8
.9.95.98
1
Ir
x In
x Ir
22.5
34 5
68
10
Isd
1.5
.512
48
121620
tr(s)
at 6 Ir24
on I2t
.2
.3.4 .4
.1
.2.3
.10
instantaneous
DB
1193
97
0 Ir I
t
IiIsd
Long time + Short time + Instantaneous
Micrologic 6.0: selective + ground-fault protection
DB
�289
22 Micrologic 6.0
delay
short time
on I2t
.2
.3.4 .4
.1
.2
.10
long timealarm
ground fault
setting
4
test
.4.5.6
.7.8
.9.95.98
1
Ir
x In .512
48
121620
tr(s)
at 6 Ir24
x Ir
22.5
3 4 568
10
Isd
1.5
tsd(s)
x In
3
68 10
1215
off2
BC
D E FGH
I
Ig
Aon I
2t
.2
.3.4 .4
.1
.2.3
.10off
tg(s)
.1
.3instantaneous
I i
DB
�289
23
0 Ir I
t
IiIsd
DB
�289
24
0 I
t
I2t off
I2t on
Ig
Long time + Short time + Instantaneous
Ground-fault protection
304443722AA - 04/20�0
1 Top fastener2 Bottom fastener3 Protective cover4 Cover opening point5 Lead-seal fixture for protective cover6 Long-time rating plug7 Screw for long-time rating plug8 Connection with circuit breaker9 Housing for battery10 Terminal block for external connections
Adjustment dials
11 Long-time current setting Ir12 Long-time tripping delay tr13 Short-time pickup Isd14 Short-time tripping delay tsd15 Instantaneous pick-up Ii16 Ground-fault pick-up Ig17 Ground-fault tripping delay tg
Indications
18 LED indicating an overload19 LED indicating long-time tripping20 LED indicating short-time tripping21 LED indicating ground-fault tripping22 LED indicating auto-protection tripping
Test
23 Button for fault-trip reset and battery test24 Test button for ground-fault protection25 Test connector
Identifying your control unitPresentation
E51
355B
E51
356A
Micrologic 2.0
.4.5.6
.7.8 .9
.95
.98
1.5
12
48 12
16
20
24
long time
alarm
Ir
tr(s)
x In@ 6 Ir
1
5
3
7
6
4
28
Discovering your control unit
DB
�289
25
.4.5.6
.7.8 .9
.95
.98
1.5
12
48 12
16
20
24
long time
alarm
Ir
tr(s)
x In@ 6 Ir
7
6
3
2
1
10
5
9
Micrologic 6.0
4
DB
�289
52
Micrologic 2.0
.98
instantaneous
long timealarm
.512
48
121620
tr(s)
at 6 Ir24.4
.5
.6.7
.8.9
.95
1
Ir
x In
x Ir
22.5
3 4 568
101.5
setting
Isd
11
12
13
7
18
5
25
DB
�289
26
.4.5.6
.7.8
.9.95.98
1
delay
short timeI itsd
(s)
on I2t
.2
.3.4 .4
.1
.2.3
.10off
long timealarmIr
x In
ground fault
BC
DE F
GH
I
Ig tg(s)
on I2t
.2
.3.4 .4
.1
.2.3
.10off
A
.512
48
121620
tr(s)
at 6 Ir24
settingx Ir
22.5
34 5
68
10
Isd
1.5x In
34
68 10
1215
off
test
instantaneous
2
Micrologic 6.0
12
11
14
13
17
16
18
23
7
15
25
22212019
24
5
DB
�289
54 Micrologic 5.0
setting delay
short time
long timealarm
4
.4.5.6
.7.8
.9.95.98
1
Ir
x In .512
48
121620
tr(s)
at 6 Ir24
I i
x In
3
68 10
1215
off2
tsd(s)
on I2t
.2
.3.4 .4
.1
.2.3
.10offx Ir
2
2.53
4 568
10
Isd
1.5
11
12
7
18
5
25
13
14
15
instantaneous
4 04443722AA - 04/20�0
Discovering your control unit
Overview of functionsCurrent protection
Protection settingsDepending on the type of installation, it is possible to set the tripping curve of your control unit using the parameters presented below.
Micrologic 2.0 Micrologic 5.0 and 6.0 Micrologic 6.0
DB
1193
98
0 Ir Isd I
t1
2
3
DB
1193
99
1
2
34
5
0 Ir Isd I
t
Ii
I2t off
I2t on DB
�289
27
0 I
t
I2t off
I2t on
Ig
1
2
�. Current setting Ir (long time)2. Tripping delay tr (long time) for 6 x Ir3. Pick-up Isd (instantaneous)
�. Current setting Ir (long time)2. Tripping delay tr (long time) for 6 x Ir3. Pick-up Isd (short time)4. Tripping delay tsd (short time)5. Pick-up Ii (instantaneous)
�. Pick-up Ig (ground fault)2. Delay tg (ground fault)
Long-time protectionThe long-time protection function protects cables (phases and neutral) against overloads. This function is based on true rms measurements.
Thermal memoryThe 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 Accuracy 2.0, 5.0 and 6.0Current setting Ir = In (*) x … 0.4 0.5 0.6 0.7 0.8 0.9 0.95 0.98 1Tripping betweeen �.05 and �.20 Ir Other ranges or disable by changing rating plug
Time setting 0.5 1 2 4 8 12 16 20 24Time delay (s) tr at 1.5 x Ir
tr at 6 x Irtr at 7.2 x Ir
0 to - 30%0 to - 20%0 to - 20
�2.50.7 (1)
0.7 (2)
25�0.69
502�.38
�0042.7
20085.5
300�28.3
400�6��
50020�3.8
60024�6.6
(*) In: circuit breaker rating(1) 0 to - 40%(2) 0 to - 60%
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".
Overload LED
E51
360A
x Ir
2
2.53 4 5
6
8101.5
setting
Isdinstantaneous
long timealarmtr
(s)
.4.5.6
.7.8
.9.95.98
1
Ir
x In .512
48
121620
at 6 Ir24
E51
361A
.4.5.6
.7.8
.9.95.98
1
delay
short timeI itsd
(s)
on I2t
.2
.3.4 .4
.1
.2.3
.10
off
long timealarmIr
x In .512
48
121620
tr(s)
at 6 Ir24
settingx Ir
2
2.53 4 5
68
10
Isd
1.5x In
34
6 8 101215
off2
instantaneous
DB
�289
28
.4.5.6
.7.8
.9.95.98
1
delay
short timeI itsd
(s)
on I2t
.2
.3.4 .4
.1
.2.3
.10off
long timealarmIr
x In
ground fault
BC
DE F
GH
I
Ig tg(s)
on I2t
.2
.3.4 .4
.1
.2.3
.10off
A
.512
48
121620
tr(s)
at 6 Ir24
settingx Ir
22.5
34 5
68
10
Isd
1.5x In
34
68 10
1215
off
test
instantaneous
2
This LED signals that the long-time current setting Ir has been overrun.
504443722AA - 04/20�0
Short-time protectionThe short-time protection function protects the distribution system against
impedant short-circuits.The short-time tripping delay can be used to ensure discrimination with
a downstream circuit breaker.This function carries out true rms measurements.
The I2t ON and I2t OFF options enhance discrimination with downstream protection devices.
Use of I2t curves with short-time protection:I2t OFF selected: the protection function implements a constant time curveI2t ON selected: the protection function implements an I2t inverse-time curve up to
�0 Ir. Above �0 Ir, the time curve is constant. Short-time pick-up Isd and tripping delay tsd
Micrologic control unit 2.0, 5.0 and 6.0Pick-up Isd = Ir x … accuracy ±10 % �.5 2 2.5 3 4 5 6 8 �0Time delay (ms)at �0 Ir
setting I2t OffI2t On
0 0.�0.�
0.20.2
0.30.3
0.40.4
I2t On orI2t Off
tsd (max resettable time)tsd (max break time)
2080
80�40
�40200
230320
350500
Instantaneous protectionThe 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.
This function carries out true rms measurements.
Instantaneous pick-up Isd
Micrologic control unit 2.0Pick-up Isd = Ir x … accuracy ±10 % �.5 2 2.5 3 4 5 6 8 �0Time delay (ms) tsd (max resettable time)
tsd (max break time)2080
Instantaneous pick-up Ii
Micrologic control unit 5.0 and 6.0Pick-up Ii = In (*) x … accuracy ±10 % 2 3 4 6 8 �0 �2 �5 OFFTime delay (ms) tsd (max resettable time)
tsd (max break time)2050
(*) In: circuit-breaker rating.
b
b
b
b
bvv
b
b
Discovering your control unit
Overview of functionsCurrent protection
6 04443722AA - 04/20�0
Discovering your control unit
Overview of functionsCurrent protection
Neutral protection on four-pole circuit breakersProtection of the neutral conductor depends on the distribution system. There are three possibilities:
Type of neutral DescriptionNeutral unprotected The distribution system does not require protection
of the neutral conductor.Neutral protection at 0.5 In
The cross-sectional area of the neutral conductor is half that of the phase conductors.
The long-time current setting Ir for the neutral is equal to half the setting value
The short-time pick-up Isd for the neutral is equal to half the setting value
The instantaneous pick-up Isd (Micrologic 2.0) for the neutral is equal to half the setting value
The instantaneous pick-up Ii (Micrologic 5.0 and 6.0) for the neutral is equal to the setting value
b
b
b
b
Neutral protection at In The cross-sectional area of the neutral conductor is equal to that of the phase conductors.
The long-time current setting Ir for the neutral is equal to the setting value
The short-time pick-up Isd for the neutral is equal to the setting value
The instantaneous pick-ups Isd and Ii for the neutral are equal to the setting value
b
b
b
Neutral protection on three-pole devicesNeutral protection is not available on three-pole devices.
Ground-fault protection on Micrologic 6.0 A ground fault in the protection conductors can provoke local temperature rise at
the site of the fault or in the conductors.Ground-fault and neutral protection are independent and can therefore be
combined. The purpose of the ground-fault protection function is to eliminate this type of fault.
There are two types of ground-fault protection.
Type DescriptionResidual The function determines the zero-phase sequence current, i.e.
the vectorial sum of the phase and neutral currentsIt detects faults downstream of the circuit breaker.
b
b
Source Ground Return Using a special external sensor, this function directly measures the fault current returning to the transformer via the earth cable
It detects faults both upstream and downstream of the circuit breaker
The maximum distance between the sensor and the circuit breaker is ten metres.
b
b
b
Ground-fault pick-up Ig and tripping delay tgThe pick-up and tripping-delay values can be set independently and are identical for both the residual and "source ground return" ground-fault protection functions.
Micrologic control unit 6.0Pick-up Ig = In (*) x … accuracy ±10 % A B C D E F G H I
In y 400 A 0.3 0.3 0.4 0.5 0.6 0.7 0.8 0.9 �400 A < In y �200 A 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 �In > �200 A 500 A 640 A 720 A 800 A 880 A 960 A �040 A ��20 A �200 A
Time delay (ms)at �0 In (*)
setting I2t OffI2t On
0 0.�0.�
0.20.2
0.30.3
0.40.4
I2t On orI2t Off
tg (max resettable time)tg (max break time)
2080
80�40
�40200
230320
350500
* In: circuit-breaker rating.
b
b
b
704443722AA - 04/20�0
Discovering your control unit
Overview of functionsMicrologic 6.0 fault indications
The battery maintains the fault indications.If there are no indications, check the battery.
DB
�289
29
Micrologic 6.0 Signals tripping due to an overrun of the long-time current setting Ir.
DB
�289
30
Micrologic 6.0 Signals tripping due to an overrun of the short-time pick-up Isd or the instantaneous pick-up Isd / Ii.
DB
�289
3�
Micrologic 6.0 Signals tripping due to an overrun of the ground-fault pick-up Ig.
DB
�289
32
Micrologic 6.0 Signals tripping due to the auto-protection function of the control unit.The auto-protection function (excessive temperature or short-circuit higher than circuit breaker capacity) opens the circuit breaker and turns on the Ap LED.
Important remarkIf the circuit breaker remains closed and the Ap LED remains on, contact the Schneider after-sales support department.
8 04443722AA - 04/20�0
Setting your control unit Setting procedure
Important remarkWith the 4P 3D setting, the current in the neutral must not exceed the rated current of the circuit breaker.
Selecting the type of neutral protectionOn four-pole circuit breakers, it is possible to select the type of neutral protection using the three-position switch:
E51
383A
4P 3D
3D+N/2
4P 4D
Neutral unprotected (4P 3D)
Neutral protection at 0.5 In (3D + N/2)
Neutral protection at In (4P 4D).
b
b
b
Setting procedureUsing the adjustment dials
DB
1194
00
Micrologic 2.0
1
DB
1194
01
Micrologic 2.0
2D
B�2
0063
Micrologic 2.0
3
Open the protective cover.
Select the desired setting. Close the protective cover and, if necessary, install a lead seal to protect the settings.
904443722AA - 04/20�0
Setting the Micrologic 2.0 control unit
Setting your control unit
The rating of the circuit breaker in this example is 2000 A.
DB
�200
64
In = 2000 A
Micrologic 2.0
In = 2000 A
See pages 4, 5 and 6 for information on the available settings.
Set the threshold values
DB
1194
05
In = 2000 A
Ir = 0.7 x In = 1400 A
Isd = 3 x Ir = 4200 A
alarm
x Ir
22.5
3 4 568
101.5
setting
Isdinstantaneous
.4.5.6
.7 .8 .9.95.98
1
long timeIr
x In
DB
1194
06
0 I
tIr
Isd
Set the tripping delay
DB
1194
04
long timealarm
.512
48
121620
tr(s)
at 6 Ir24
tr = 1 second
DB
1194
07
0 I
t
tr
�0 04443722AA - 04/20�0
Setting your control unit Setting the Micrologic 5.0 control unit
The rating of the circuit breaker in this example is 2000 A.
See pages 4, 5 and 6 for information on the available settings.
Set the threshold values
DB
1194
08 In = 2000 AIr = 0.7 x In = 1400 A
Ii = 3 x In = 6000 A
Isd = 2 x Ir = 2800 A.4.5.6
.7 .8 .9.95.98
1
setting
short timeI i
x Ir
22.5
3 4 568
10
Isd
1.5
long timealarmIr
x In
x In
34
6 8 101215
off2
instantaneous
I2t OFF curve I2t ON curve
DB
1194
10
Ir
Isd
Ii
0 I
t
DB
1194
10
Ir
Isd
Ii
0 I
t
Set the tripping delay
DB
1194
09
tr = 1 second
tsd = 0.2 seconds
short time
long timealarm
.512
4 8 121620
tr(s)
at 6 Ir24
delay
tsd(s)
on I2t
.2
.3.4 .4
.1
.2.3
.10
I2t on I2t off
I2t OFF curve I2t ON curve
DB
1194
12
tr
tsd
0 I
t
DB
1194
13
tr
tsd
0 I
t
��04443722AA - 04/20�0
Setting your control unit Setting the Micrologic 6.0 control unit
The rating of the circuit breaker in this example is 2000 A.
See pages 4, 5 and 6 for information on the available settings.
Set the threshold values
DB
�289
34
short time
long timealarm
ground fault
setting
.4.5.6
.7.8
.9.95.98
1
Ir
x In
x Ir
22.5
3 4 56
810
Isd
1.5
BC
D E FGH
I
Ig
A
I i
x In
34
6 8 101215
off2
In = 2000 A
Ir = 0.7 x In = 1400 A
Ii = 3 x In = 6000 A
Isd = 2 x Ir = 2800 A
B Ig = 640 A
instantaneous
test
I2t ON curve I2t OFF curve
DB
�289
35 Ir
Isd
Ii
0 I
t
DB
�289
36
Ir
Isd
Ii
0 I
t
DB
�289
37
0 I
t
Ig
DB
�289
38
0 I
t
Ig
Set the tripping delay
DB
�289
43
short time
long timealarm
ground fault
.512
48
121620
tr(s)
at 6 Ir24
delay
tsd(s)
on I2t
.2
.3.4 .4
.2.3
.10
off
tg(s)
on I2t
.2.3
.4 .4
.1
.2.3
.10off
tr = 1 s
tsd = 0.2 s
tg = 0.2 s
I2t on I2t off.1
test
I2t ON curve I2t OFF curve
DB
�289
39
tr
tsd
0 I
t
DB
�289
40
tr
tsd
0 I
t
DB
�289
4�
0 I
t
tg
DB
�289
42
0 I
t
tg
�2 04443722AA - 04/20�0
Fault and status indications Resetting the fault indications and checking battery status on Micrologic 6.0
The procedure for closing the circuit breaker following a fault trip is presented in the circuit-breaker user manual.
Resetting the fault indicationsDetermine why the circuit breaker tripped. The fault indication is maintained until it
is reset on the control unit. Press the fault-trip reset button.
b
b
DB
�289
44 Micrologic 6.0
Check the parameter settings of the control unit.b
Checking the battery
DB
�289
44 Micrologic 6.0
Press the battery-test button (which is the same as the fault-trip reset button) to check the luminance of trip indicator light.
If trip indicators are dim or there is no luminance, then the battery needs to be changed.
b
b
If the battery needs to be changed, order a new battery with the Schneider catalogue number 33593.b Lithium batteryb �.2 AA, 3.6 V, 850 mA/hb SAFT LS3 SONNENSCHEIN TEL-Sb Service life ten years.
Changing the control-unit battery�. Remove the battery cover.
2. Remove the battery.
DB
�289
45
DB
�289
46
3.Insert a new battery.Check the polarity.
4. Put the cover back inplace. Press the battery-test button to check the new battery.
DB
�289
47
DB
�289
48
�304443722AA - 04/20�0
Testing the control unitFault and status indications
See the user manual for the portable test kit. Testing the control unitTo test the control unit, connect the portable test kit via the test connector
DB
1194
00
Micrologic 2.0
1
DB
1194
15
Micrologic 2.0
2
Micrologic 2.0
2
Testing the ground-fault protection on Micrologic 6.01. Charge and close the circuit breaker.2. Using a screwdriver, press the test button for ground-fault protection. The circuit breaker should open.
Important remarkIf the circuit breaker does not open, contact the Schneider after-sales support department.
DB
�289
50
Micrologic 6.0
�4 04443722AA - 04/20�0
Technical appendix Tripping curves
Long-time and instantaneous protection - Micrologic 2.0
DB
1194
16
.5 .7 1 2 3 4 5 7 10 20 30 50 70 100 200 300
I / Ir
10 0005 000
2 0001 000
500
200100
50
2010
5
21.5
.2
.1.05
.02
.01.005
.002
.001
t(s)
tr = 0.5…24 s
Isd = 1.5…10 x Ir
Ir = 0.4…1 x In
Long-time, short-time and instantaneous protection - Micrologic 5.0 and 6.0
DB
1194
17
0
0.40.30.20.1
t(s)
.5 .7 1 2 3 4 5 7 10 20 3 5 7 10 20 30
10 0005 000
2 0001 000
500
200100
50
2010
5
21.5
.2
.1.05
.02
.01.005
.002
.001
x In
tr = 0.5…24 s
Isd = 1.5…10 x Ir
Ir = 0.4…1 x In
Ii = 2…15 x In . OFF
I2t OFF
x Ir
0.40.30.20.1
I2t ON
0
�504443722AA - 04/20�0
Technical appendix Tripping curves
Ground-fault protection - Micrologic 6.0
DB
�289
5�
�6 04443722AA - 04/20�0
Changing the long-time rating plug
Technical appendix
Select the long-time rating plugA number of setting ranges for the long-time current setting are available on Micrologic 2.0, 5.0 and 6.0 control units by changing the long-time rating plug.The available rating plugs are listed below:
Part number Setting range for the Ir value33542 standard 0.4 to 1 x Ir33543 low setting 0.4 to 0.8 x Ir33544 high setting 0.8 to 1 x Ir33545 without long-time protection
Ir = In for the short-time protection setting
Important remarkFollowing any modifications to the long-time rating plug, all control-unit protection parameters must be checked.
Change the long-time rating plugProceed in the following manner.
�. Open the circuit breaker.2. Open the protective cover of the control unit.
3. Completely remove the long-time rating plug screw.
DB
1194
18
DB
��94
�9
If no long-time rating plug is installed, the control unit continues to operate under the following downgraded conditions:
the long-time current setting Ir is 0.4, whatever the position of the adjustment dial
the long-time tripping delay tr corresponds to the value indicated by the adjustment dial.
b
b
4. Snap out the rating plug. 5. Clip in the new rating plug.
DB
1194
20
.4.5.6
.7.8 .9
.95
.981
long time
alarm
Ir
x In.5
12
48 12
1620
tr(s)
@ 6 Ir24
DB
1194
21
.4.5.6
.7.8 .9
.95
.981
long time
alarm
Ir
x In.5
12
48 12
1620
tr(s)
@ 6 Ir24
6. Refit the screw for the long-time rating plug.
7. Check and/or modify the control-unit settings
�704443722AA - 04/20�0
Thermal memory
Thermal memoryThe 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:
repetitive motor starting;loads fluctuating near the protection settings;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 memoryAll Micrologic control units are equipped as standard with a thermal memory.
For all protection functions, prior to tripping, the temperature-rise and cooling time constants are equal and depend on the tripping delay in question:
if the tripping delay is short, the time constant is low;if the tripping delay is long, the time constant is high.
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.
Short-time protection and intermittent faultsFor the short-time protection function, intermittent currents that do no provoke tripping are stored in the Micrologic memory.This information is equivalent to the long-time thermal memory and reduces the tripping delay for the short-time protection.Following a trip, the short-time tsd tripping delay is reduced to the value of the minimum setting for 20 seconds.
Ground-fault protection and intermittent faultsThe ground-fault protection implements the same function as the short-time protection.
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Technical appendix
�8 04443722AA - 04/20�0
Notes
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Notes
20 04443722AA - 04/20�0
Notes
04443722AA-05
As standards, specifications and designs change from time to time, please ask for confirmation of the information given in this publication.
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