Rockwell Automation 140G-NTK-E12 User Manual

Bul. 140G/140MG

140G-NTT-E12; 140G-NTK-E12

LSIG and LSIG-MM release for 140G-N/ 140G-NS/ 140G-R

Installation - Installazione - Instalación Instalação - -

WARNING: To prevent electrical shock, disconnect from power source before installing or servicing. Install in suitable enclosure. Keep free from contaminants. (Follow NFPA70E requirements).

AVVERTENZA: Per prevenire infortuni, togliere tensione prima dell'installazione o manutenzione. Installare in custodia idonea. Tenere lontano da contaminanti. (Seguire i requisiti NFPA70E).

WARNUNG: Vor Installationsoder Servicearbeiten Stromversorgung zur Vermeidung von elektrischen Unfällen trennen. Die Geräte müssen in einem passenden Gehäuse eingebaut und gegen Verschmutzung geschützt werden. (Befolgen Sie die Anforderungen nach NFPA70E).

AVERTISSEMENT: Avant le montage et la mise en service, couper l'alimentation secteur pour éviter toute décharge. Prévoir une mise en coffret ou armoire appropriée. Protéger le produit contre les environnements agressifs. (Vous devez respecter la norme NFPA70E).

ADVERTENCIA: Desconéctese de la corriente eléctrica, antes de la instalación o del servicio, a fin de impedir sacudidas eléctricas. Instálelo en una caja apropiada. Manténgalo libre de contaminantes. (Cumpla con los requisitos NFPA70E). ATENÇÃO: Para evitar choques, desconectar da corrente elétrica antes de fazer a instalação ou a manutenção. Instalar em caixa apropriada. Manter livre de contaminantes. (Cumpra as exigências da norma NFPA70E).

Contents
1.	Protection releases - General notes.....................................	3
1.1	Safety notes..........................................................................	3
1.1.1	Notes for dielectric stiffness tests.........................................	3
1.2	Abbreviations and notes ......................................................	4
1.2.1	Abbreviations........................................................................	4
1.2.2	Notes.....................................................................................	4
1.2.3	Compatibility between CB and relay....................................	4
2.	LSIG Release - Identification.................................................	5
2.1	Specifications........................................................................	5
2.1.1	General..................................................................................	5
2.1.2	Electrical characteristics.......................................................	5
2.1.2.1	Self-powering........................................................................	5
2.1.2.2	Auxiliary power supply .........................................................	5
2.1.3	Environmental characteristics...............................................	6
2.1.4	Protection functions..............................................................	6
2.1.4.1	RMS calculation....................................................................	6
2.1.4.2	Watchdog..............................................................................	6
2.1.5	Description of protection functions.......................................	6
2.1.5.1	Protection “L”.........................................................................	6
2.1.5.2	Protection “S”........................................................................	6
2.1.5.3	Protection “I”.........................................................................	6
2.1.5.4	Protection “G”.......................................................................	6
2.1.5.5	Protection against instantaneous short-circuit “Iinst”..........	7
2.1.6	Summary table of protections..............................................	7
2.1.7	Measurements......................................................................	7
2.2	Other functions......................................................................	7
2.2.1	Indication of trip cause and trip test button..........................	7
2.3	Commissioning.....................................................................	8
2.3.1	Connections..........................................................................	8
2.3.2	CS and TC connection check...............................................	8

2.3.3Current sensor connection for external neutral conductor..8

2.4	User interface........................................................................	8
2.4.1	Trip Test.................................................................................	9
2.4.2	Initial settings........................................................................	9
2.4.3	Changing protection functions.............................................	9
2.4.3.1	Example of setting ...............................................................	9
2.4.4	Default setting of LSIG unit...................................................	9
2.5	Operating instructions/Operation in service.........................	9
2.5.1	Adjusting the neutral.............................................................	9
2.5.2	Guidance for Neutral adjustment........................................	10
2.5.3	Replacing an electronic release.........................................	10

2.6	Definition of alarms and signals for the LSIG unit..............	10
2.6.1	Optical signals.....................................................................	10
2.6.2	Troubleshooting..................................................................	11
2.6.3	In case of a fault..................................................................	11
2.7	Accessories.........................................................................	11
2.7.1	Battery unit..........................................................................	11
3	LSIG-MM Release - Identification ......................................	12
3.1	Specifications......................................................................	12
3.1.1	General ...............................................................................	12
3.1.2	Electrical characteristics.....................................................	12
3.1.2.1	Self-powering......................................................................	12
3.1.2.2	Auxiliary power supply........................................................	13
3.1.3	Environmental characteristics.............................................	13
3.1.4	Description of input/output.................................................	13
3.1.4.1	Binary input ........................................................................	13
3.1.4.2	Binary output ......................................................................	13
3.1.5	Communication bus............................................................	13
3.1.6	Protection functions............................................................	13
3.1.6.1	RMS calculation..................................................................	13
3.1.6.2	Harmonic distortion............................................................	13
3.1.6.3	Circuit-breaker state............................................................	13
3.1.7	Measurement functions......................................................	14
3.1.8	Watchdog............................................................................	14
3.1.9	Description of protection functions.....................................	14
3.1.9.1	Protection “L”.......................................................................	14
3.1.9.1.1 Thermal memory “L”............................................................		14
3.1.9.2	Protection “S”......................................................................	14
3.1.9.2.1 Thermal memory “S”..........................................................		14
3.1.9.2.2 Start-up threshold “S”.........................................................		15
3.1.9.3	Protection “I”.......................................................................	15
3.1.9.4	Protection for maintenance mode “MM”............................	15
3.1.9.5	Protection “G”.....................................................................	15
3.1.9.5.1 Start-up threshold “G”........................................................		16
3.1.9.6	Protection against phase unbalance “U”...........................	16
3.1.9.7	Protection against overtemperature inside the relay, “OT”.16
3.1.9.8	Load control function .........................................................	16
3.1.9.9	Summary table of the protection function settings
	for the LSIG-MM..................................................................	17
3.1.9.10 Table of measurements.......................................................		17
3.2	Commissioning...................................................................	18
3.2.1	Connections........................................................................	18
3.2.1.1	Current sensor connection for external neutral conductor.18
3.2.2	CS and TC connection check.............................................	18
3.2.3	Test......................................................................................	18
3.2.4	Initial settings......................................................................	18
3.2.5	Password management......................................................	18
3.2.6	Replacing an electronic release.........................................	18
3.2.6.1	Installation...........................................................................	18
3.2.6.2	Uninstalling.........................................................................	19
3.3	User interface......................................................................	19
3.3.1	Use of pushbuttons.............................................................	20
3.3.2	Read and Edit modes.........................................................	20
3.3.3	Changing parameters.........................................................	20
3.3.3.1	Modification of basic configuration.....................................	22
3.3.4	Default settings...................................................................	23
3.4	Operating instructions/Operation in service.......................	24
3.4.1	Menu...................................................................................	24
3.4.2	Protections menu................................................................	25
3.4.2.1	Protections menu table.......................................................	25
3.4.3	Measurements Menu..........................................................	26
3.4.3.1	Measurements Menu table.................................................	26
3.4.4	Settings Menu.....................................................................	27
3.4.4.1	Settings Menu table............................................................	27
3.4.4.2	Adjusting the neutral ..........................................................	27
3.4.4.3	Mains frequency settings....................................................	28
3.4.4.4	Modules...............................................................................	28
3.4.4.4.1 Communication module.....................................................		28
3.4.5	Test Menu............................................................................	28
3.4.5.1	Test Menu table ..................................................................	28
3.4.6	Information Menu................................................................	29
3.4.6.1	Information on trip and opening data.................................	29
3.5	Definition of alarms and signals for the LSIG-MM units.....	29
3.5.1	Optical signals.....................................................................	29

DIR 1000587R0002 (L3821)

3.5.2	Table of error and warning messages................................	30
3.5.3	Error messages displayed in pop-up window....................	30
3.6	Troubleshooting LSIG-MM units.........................................	31
3.6.1	In case of a fault..................................................................	32
3.7	Accessories.........................................................................	32
3.7.1	Battery unit..........................................................................	32
4.	Modules...............................................................................	33
4.1	Operating instructions/Operation in service.......................	33

4.1.1Using the Measurement submenus with

	the LSIG-MM module..........................................................	33
4.1.2	Measurements Menu table.................................................	35
4.1.3.	Measurements Menu .........................................................	35
4.1.3.1	Historicals ...........................................................................	35
4.1.3.2	Trips.....................................................................................	35
4.1.3.3	Events..................................................................................	35
4.1.3.4	Measurements ...................................................................	35
4.1.3.5	Contact wear.......................................................................	35
4.1.3.6	Wave forms ........................................................................	35
4.1.4	Data Logger........................................................................	36
4.2	Communication module ....................................................	36
4.2.1	General characteristics.......................................................	36
4.2.2	Front view ...........................................................................	36
4.2.3	Releases complete with module ........................................	36
4.2.4	Power supply .....................................................................	36
4.2.5	Communication functions available...................................	36
4.2.6	Communication Module Menu...........................................	37
4.3	Contact S51/MM.................................................................	37
4.3.1	General characteristics.......................................................	37
4.3.2	Characteristics of the signalling contacts ..........................	37
4.3.3	Power supply......................................................................	37
5	Appendices.........................................................................	38
5.1	Data Logger (recorder).......................................................	38
5.1.1	General characteristics.......................................................	38
5.1.2	Description of the Data Logger menu ..............................	38
5.1.2.1	Data Logger enabling.........................................................	38
5.1.2.3	Setting the standard triggers..............................................	38
5.1.2.4	Events and display of custom Triggers..............................	39
5.1.2.5	Setting the stopping delay .................................................	39
5.1.2.6	Restart/Stop Data Logger...................................................	39
5.1.3	Recording time windows ...................................................	39

5.1.4Description of the information given by the

	Data Logger system............................................................	40
5.1.4.1	Combination of devices for reading/setting data from the
	Data Logger system............................................................	40
5.1.4.2	Access to saved data from the system...............................	40
5.1.4.3 Information from the system on configuration and status
	of Data Logger....................................................................	40
5.2	Event list table.....................................................................	41

5.2.1“Standard” events for the Data Logger function,

	selectable from the relay ....................................................	41
5.2.2	Examples of “custom” events for Data Logger function....	41
5.2.3	Combining the devices needed to customize settings......	41

DIR 1000587R0002 (L3821)

(2)

1.Protection releases - General notes

The new series of 140G circuit breakers - are equipped with a new range of electronic relays.

These new relays are called LSIG and LSIG-MM.

The new protection releases integrate all the functions of their forerunners, adding new and interesting technical features that are useful for satisfying every current and future system installation requirements.

A table can best illustrate the technical features and matching features of the three relays.

Function/Unit		LSIG	LSIG-MM
Current protections (L, S, I, G)		S	S
Additional protections (U, OT)		-	S
Temperature protection		-	S
Thermal memory		-	S
Local bus for separate auxiliary units		S	S
Cable communication (RS485)		-	S (1)
Data Logger		-	S
Maintenance mode		-	S
Communication module		-	O
Battery unit		O	S
Key:
S	: standard function/unit,
O	: optional function/unit,

-: function/unit unavailable.

Notes:

1.: with communication module,

The main features and improvements of the relay are (depending on relay + modules combination):

1.High current reading accuracy (1.5%) and other numerous functions.

2.High-performance data logger with 8 analogue signals and 64 digital signals, which can be synchronized with hundreds of events/ situations as selected by user.

3.Continuous control of current sensor and trip coil connection (all relays).

4.Cause of trip is memorized even in self-powered mode (all relays).

5.Extended neutral selection.

6.Date and time in "real time" (all relays).

1.1Safety notes

WARNING: this symbol gives information about operations, actions or circumstances that can cause injuries to the personnel, damage to the unit or economic losses.

Read this manual carefully and completely.

The use of this device should be reserved for qualified and expert personnel only.

When in doubt about its safe usage, the unit must be put out of service to prevent any accidental use.

Safe usage is assumed as impossible when:

1.the unit shows visible signs of damage.

2.the unit does not function (for example with autotest or with trip test unit).

3.the unit has been damaged in transit.

Prior to operate and/or carry out replacements on the circuit breaker, this must be open.

Further, all connected power supplies must be disabled.

1.1.1Notes for dielectric stiffness tests

Dielectric stiffness tests on releases' inputs and outputs are not permitted.

DIR 1000587R0002 (L3821)

(3)

1.2Abbreviations and notes

1.2.1Abbreviations

Abbreviations	Meaning
Battery	Power supply unit
BA	Opening coil
BC	Closing coil
CB	Circuit Breaker
CS	Current Sensor (current transformer)
Dialog	Communication module
HW	Hardware
In	Rated current of the Rating Plug installed in the circuit breaker
LSIG	Protection relay for CB 140G-N/140G-NS/140G-R
LSIG-MM	Protection relay for CB 140G-N/140G-NS
MT	Thermal memory
Relay	also called "protection unit" or "protection release"
RMS	Root mean square value
TC	Trip Coil (opening solenoid)
SW	Software
i-Test	"Info/test" button on the front of the relay
Trip	CB opening, generated by the release
Vaux	Auxiliary power supply

1.2.2Notes

A.Use the "Belden 3105A"- type two-wire cable for instance (not supplied by AB).

B.Use the "Belden 3106A"- type three-wire cable for instance (not supplied by AB).

C.The unit has a "backup-protection" function; if the first command to the opening solenoid does not immediately open the circuit-breaker (TC partially faulty), TRIP commands are repeatedly sent until the circuit-breaker opens (providing a Vaux is fitted) or the current disappears (if self-powered). The "backup" condition can be signalled by configuring the unit relays; using the "YO back" selection, it is possible to command the "opening coil (YO)" accessory as another opening device when TC does not work.

1.2.3Compatibility between CB and relay

This table summarizes all possible fitting of the relays and 140G circuit breakers.

CB\Relay	LSIG	LSIG-MM
140G/N/140G-NS	x	x
140G-R	x	x

DIR 1000587R0002 (L3821)

(4)

2.LSIG Release - Identification

The LSIG units available with protections and optional modules, are shown in the following figure.

Protections

Optional modules available

Battery unit

2.1Specifications

2.1.1General

The LSIG unit is a high-performance self-powered protection unit with Protection functions for the AB 140G-N/140G-NS/140G-R range of 3-pole and 4-pole low voltage circuit-breakers. The unit’s user interface also enables parameter setup and full pre-alarm and alarm management with LED warning/alarm indicators for protection and watchdog functions.

Depending on the version, the protections available are as follows:

Symbol	Protection against
L	overload with inverse long time delay
S	short-circuit with adjustable delay
I	instantaneous short-circuit
G	earth fault with adjustable delay

The LSIG can be installed on 3-pole CBs with and without an external neutral, or on 4-pole CBs.

It should be noted that the reference current for LSIG is In (rated current defined by Rating Plug) and not Iu (uninterrupted rated current of the CB itself).

Example: CB 140G-N 1200 with a 400 A Rating Plug has an Iu of 1200 A and an In of 400 A.

The unit opens the circuit breaker in which it is installed by means of the TC, which operates directly on the device’s mechanical linkage.

The unit is made using a digital microprocessor technology and interfaces with user by means of DIP switches. The unit’s protection parameters and general operating mode can be set by user.

2.1.2Electrical characteristics

Rated operating frequency	50/60 Hz ±10%
Pass band	3000 Hz max
Peak factor	6.3 max @ 2 In

2.1.2.1Self-powering

The unit requires no outside power source for protection and alarm signal functions. It is self-powered by current sensors installed on circuit breaker. Operation simply depends on current defined below running through at least one phase. An outside power source can be connected to enable other functions.

The characteristics of the busbar current are given in the table below.

Characteristics		Enabling the relay
Minimum three-phase busbar current to enable the relay (Led alive enable and full relay operation)		>80 A
2.1.2.2	Auxiliary power supply

External auxiliary power supply is provided using a galvanically-separated power pack.

Since auxiliary voltage needs to be isolated from the ground, “galvanically separated converters” in accordance with IEC standard 60950 (UL 1950) or equivalent IEC 60364-41 and CEI 64-8, have to be used to guarantee a current in common mode or leakage current (as defined in IEC 478/1 and CEI 22/3) no greater than 3.5 mA.

Presence of the auxiliary power supply enables the relay unit to be used even with circuit breaker open. The characteristics of the power pack are given in the table below.

Characteristics	LSIG Version
Auxiliary voltage
(galvanically separated)	24 V DC ±20%
Maximum ripple	5%
Inrush current @ 24 V	~2 A for 5 ms
Rated power @ 24 V	~2 W

DIR 1000587R0002 (L3821)

(5)

2.1.3 Environmental characteristics
Operating temperature	-25 °C ... +70 °C
Storage temperature	-40 °C ... +90 °C
Relative humidity	0% ... 98% with condensation
Degree of protection (with LSIG installed in the CB)	IP 30

2.1.4Protection functions

The LSIG protection unit carries out 5 independent protection functions, i.e.:

1.Protection against overload with inverse time “L”;

2.Protection against short-circuit with adjustable delay “S”;

3.Protection against instantaneous short-circuit “I”;

4.Protection against earth fault with adjustable delay “G”;

5.Protection against instantaneous short circuit at high currents “Iinst”.

The LSIG unit allows processing of current signal of neutral pole with different relationships relative to the value of the phases.

N.B.: Beyond 15.5xIn of current on the Ne, the protection is considered as being set to 100%.

A timing indication (“alarm” LED) is provided on front side of unit, which is enabled during an alarm for each protection. It is disabled when the alarm condition ceases or when the protection has been tripped.

The unit has a “backup-protection” function. If the circuit breaker does not open immediately the first time the Trip Coil is hit (partial TC failure), TRIP commands are sent repeatedly until the circuit breaker opens.

For inverse-time protections, the relationship between trip time and overcurrent is given by the formula: t = k/I2. For fixed-time protections with an adjustable delay, the relationship adopted is as follows: t = k.

2.1.4.1 RMS calculation

All protection functions perform their respective processing cycles on the basis of real rms value of currents (protection G is disabled for current

values greater than 8In (where I4≥0.8In), greater than 6In (where 0.5In≤ I4<0.8In) and greater than 4In (where I4<0.5In)).

If the waveform is distorted beyond the established limit (6.3@2 In), the tolerance for the calculation of the true rms value will increase.

2.1.4.2Watchdog

The LSIG unit provides some watchdog functions which can guarantee proper management of relay malfunctions. These functions are as follows:

Rating Plug validity

Watchdog for proper connection of current sensors (CS). Any faults are indicated by a glowing LED, as explained in par. 2.7.1.

Watchdog for proper opening solenoid connection (TC). Any faults are indicated by a glowing LED, as explained in par. 2.7.1.

2.1.5 Description of protection functions

2.1.5.1Protection “L”

"L” is the only protection that cannot be disabled because it is for self-protection against overloading of the relay. The type of curve that can be set is t=k/I2.

Protection trip time - inverse time - is given by the expression:

9				t1	, 1
max
			(If	/ I1)2			where lf ≤ 12In, 1s where lf > 12In

If is the fault current and I1 the protection threshold set by user.

NB: Time expressed in seconds.

2.1.5.2Protection “S”

This protection can be disabled; it can be of the fixed time (t=k) or inverse time (t=k/I2) type. In the latter case, trip time is given by the expression

100		t2	, t2
max

(If / In )2	where l	f	> l	2

If is the fault current and I2 the protection threshold set by user.

NB: Time expressed in seconds.

2.1.5.3Protection “I”

This fixed time (t=k) protection can be disabled and is designed for a nil intentional delay.

2.1.5.4Protection “G”

This protection can be disabled; it can be of the fixed time (t=k) or inverse time (t=k/i2) type. In the latter case, trip time is given by the expression

where l = lf / l4

If is the fault current and I4 the protection threshold set by user. NB: Time expressed in seconds.

DIR 1000587R0002 (L3821)

(6)

The LSIG unit can provide earth fault protection, achieved inside the relay by vectorially adding together phase and neutral currents. Fault current is defined by the following formula:

If the circuit shows no faults, the module of the sum of these currents is always nil; vice versa, the value of the fault current takes on a larger and larger value depending on size of fault.

2.1.5.5 Protection against instantaneous short-circuit “Iinst”

This function has a single fixed-time protection curve.

When the protection is tripped, the circuit breacker is opened by the opening solenoid (TC).

2.1.6 Summary table of protections

Protection

Disabling

Trip threshold

Trip time

Trip threshold

Trip time

tolerance(2)

tolerance(2)

L

I1 =

0.4 - 0.425 - 0.45 - 0.475 - 0.5 -

Release between

≤ 6 x In

(t=k/I2)



0.525 - 0.55 - 0.575 - 0.6 - 0.625 -

t1

= 3 - 12 - 24 - 36 - 48 - 72

1.05 and 1.2 x I1

± 10%

Ig

0.65 - 0.675 - 0.7 - 0.725 - 0.75 -

108 - 144 s (1)

± 20% I

g

> 6 x In

0.775 - 0.8 - 0.825 - 0.85 - 0.875 -

@ 3 I1

0.9 - 0.925 - 0.975 - 1 x In

S



I2 =

0,6 - 0,8 - 1,2 - 1,8 - 2,4 - 3 - 3,6 - 4,2

with I > I2

±

7%

Ig ≤ 6 x In

The best of the two data:

(t=k)

5 - 5,8 - 6,6 - 7,4 - 8,2 - 9 - 10 x In

t2

= 0.1 - 0.2 - 0.3 - 0.4 - 0.5 - 0.6

± 10% Ig >6 x In

± 10% or ± 40 ms

0.7 - 0.8 s

S



I2 =

0,6 - 0,8 - 1,2 - 1,8 - 2,4 - 3 - 3,6 - 4,2

t2

= 0.1 - 0.2 - 0.3 - 0.4 - 0.5 - 0.6

±

7%

Ig ≤ 6 x In

± 15%

Ig

≤ 6 x In

(t=k/I2)

5 - 5,8 - 6,6 - 7,4 - 8,2 - 9 - 10 x In

0.7 - 0.8 s

± 10%

I >6 x In

± 20%

I

g

>6 x In

@ 10 In

g

I



I3 =

1,5 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 -

≤ 30 ms

± 10%

(t=k)

11 - 12 - 13 - 14 - 15 x In

G



I4 =

0.2 - 0.3 - 0.4 - 0.6 - 0.8 - 0.9 -

with I > I4

±

7%

The best of the two data:

(t=k)

1 x In

t4

= 0.1 - 0.2 - 0.4 - 0.8 s

± 10% or ± 40 ms

t4

= 0.1@ 4.47 I4

G



I4 =

0.2 - 0.3 - 0.4 - 0.6 - 0.8 - 0.9 -

t4

= 0.2@ 3.16 I4

±

7%

± 15%

(t=k/I2)

1 x In

t4

= 0.4@ 2.24 I4

t4

= 0.8@ 1.58 I4

I inst



Automatic, defined by AB

Instantaneous

(1)The minimum value of this trip is 1s regardless of the type of curve set (self-

protection).

(2) These tolerances apply under the following conditions:

-self-powered relay at full power (without start-up)

-presence of auxiliary power supply

-two-phase or three-phase power supply

-preset trip time ≥100ms

(3)The value of this trip is ensured inside the time window ranging from 40 to 500 ms from CB closing; this setting must be done by customer.

2.1.7Measurements

For all cases not covered by the above assumptions, the following tolerance values apply

	Protections	Trip threshold	Trip time
	L	Release between 1.05 and 1.25 x I1	± 20%
	S	± 10%	± 20%
I		± 15%	≤ 60 ms
G		± 10%	± 20%
Others		± 20%

The LSIG protection unit can perform different types of measurements shown in the following table with relevant tolerances.

Type of measurement	Tolerance
	Range	%
Phase and neutral current	0.3 ... 6 In	1.5
Earth fault current	0.3 ... 4 In	1.5

2.2 Other functions

2.2.1Indication of trip cause and trip test button

Using the “i Test” button, any information stored in the past 48 hours can be retrieved. In addition, a trip test can be obtained by keeping the button pressed for 7 seconds, and autotest by keeping button pressed for 3 seconds, with battery unit on and with no running current.

DIR 1000587R0002 (L3821)

(7)

2.3Commissioning

2.3.1Connections

For the connections provided by user, the recommendations contained in this document must be strictly complied with.

This will enable us to meet all international reference standards and ensure perfect relay operation even under severe environmental and electromagnetic conditions. Take particular care with earthing connections.

2.3.2CS and TC connection check

If LSIG has been installed by user, proper connection of TC and CS cables should be checked (with CB open and Vaux or battery unit) before commissioning the circuit breaker; if not so, make the right connections. If any of the red LEDs is lit, this means an error in CS and/or TC connections. See par. 2.6.1.

2.3.3Current sensor connection for external neutral conductor

When the current sensor for the external neutral conductor has to be connected to a three-pole circuit breaker, remember to set InN accordingly (see par. 2.4, ref. 3).

During this procedure, the circuit breaker must be open and preferably isolated.

2.4User interface

Wording on LSIG unit front side:

1			2		3				4					5		6		7		8		9		10		11	12		13			14		15			16	17	18

27

26

25

24

23 22

21

20 19

Ref. Description

1Serial number of LSIG protection release

2Position indicator for mains frequency DIP switch

3 Position indicator of DIP switch for setting neutral conductor’s protection

4 Test connector to connect or test release using battery unit

5 Position indicator of DIP switches for setting threshold I1

6 DIP switches for main setting of current threshold l1

7 DIP switches for fine-setting of current threshold l1

8Alarm indicator LED for protection function L

9Pre-Alarm indicator LED for protection function L

10 Position indicator of DIP switches for setting threshold I2

11DIP switches for setting current threshold I2

12Alarm indicator LED for protection function S

13Position indicator of DIP switches for setting threshold I3

14DIP switches for setting current threshold I3

15Alarm indicator LED for protection function I

16Position indicator of DIP switches for setting threshold I4

17DIP switches for setting current threshold I4

18Alarm indicator LED for protection function G

19DIP switch for setting trip time t4 and type of curve

20Position indicator of DIP switches for setting time t4

DIR 1000587R0002 (L3821)

(8)

Ref. Description

21Test and “i Test” info button

22Position indicator of DIP switches for setting time t2 23 DIP switch for setting trip time t2 and type of curve

24Position indicator of DIP switches for setting time t1 25 DIP switch for setting trip time t1

26 Rating plug

27DIP switch for setting mains frequency and adjusting neutral protection

2.4.1Trip Test

Before commissioning, run a test (“Trip Test”) on the whole TC chain by pressing and holding button “iTest” pressed for at least 7 sec. A positive outcome is shown by circuit-breaker opening (see Watchdog). To run the test, battery unit must be connected.

2.4.2Initial settings

AB will have the adhesive labels affixed onto the LSIG for all variables relating to circuit breaker (e.g. Type of circuit breaker, Rating Plug size, etc.) Consider that AB provides a sensible definition for each possible setting (see par. 2.4.4).

Apart from this, before the LSIG unit is commissioned, user must accurately define every alterable parameter.

2.4.3Changing protection functions

This paragraph describes setting of protection functions implemented in the LSIG unit. Only setting methods and values that can be selected are explained here. For all other information on the technical characteristics of the protection functions, see par. 2.1.4.

No parameters can be set when the LSIG unit is in alarm conditions.

2.4.3.1Example of setting

In the diagrams on front plate (see par. 2.4) relating to settings, the position of the DIP switch is shown in white color.

An example of how to set the DIP switch for protection function L is given below, where In = 2000 A:

Frequency

Incorrect configuration of DIP switches causes a “inconsistent settings” indicated by LEDs (see par. 2.6.1). The rule to be complied with is: I1<I2<I3.

E.g.: if I1=1In and I2=1In, the relay will indicate an “inconsistent setting” error. Same indication if I2=5In and I3=4In

2.4.4Default setting of LSIG unit

The LSIG is supplied by AB with the following predefined parameters:

#	Protection	Thresholds	Time
1	L	1 In	144 s
2	S	Off	0.1 s
3	I	4 In	—
4	G	Off	0.1 s
5	Mains frequency	(1)
6	Neutral Sel.	(2)

Note:

(1)= 50 Hz for IEC type CB 60 Hz for UL type CB

(2)= Off for three-pole versions 50% for 4-pole versions

2.5Operating instructions/Operation in service

2.5.1Adjusting the neutral

Neutral protection is normally set to a current value 50% of the adjustment made on the phases.

DIR 1000587R0002 (L3821)

(9)

In some installations, where particularly high harmonics occur, the current running on neutral may be higher than that of phases. In the LSIG release, this protection can be set for the following values: InN =0 - 50% - 100% - 200% * In.

With three-pole circuit breakers, without external neutral, Neutral is adjusted to OFF

2.5.2Guidance for Neutral adjustment

Adjustment of neutral value (InN) must comply with the following formula: I1 x InN≤Iu

When a 4-pole CB is available, this setting is controlled by the relay which signals the fault through a LED (see par. 2.6.1), and automatically adjusts the parameter within the accepted limits.

When a 3-pole CB with external neutral is available, the relay does not perform any control and settings are to be adjusted by user.

E.g.:	With 140G-N 1200 with Rating Plug at 400 A, Iu=1200 A and I1=1In, adjustment of InN may be 50-100-200%
	With 140G-N 1200 and 800 A Rating Plug, Iu=1200 A and I1=1In, adjustment of InN may be 50-100%

Note 1: I1=1ln setting is intended as the maximum adjustment of the protection against overloads. Actual maximum allowable adjustment must take into account any tempe-

rature derating, terminals used and altitude, or In (rating plug)≤50% of circuit breaker size.

Failure to comply with the setting limits for “I1“ and “InN” can cause damage to circuit breaker with consequent risks even for operator.

2.5.3Replacing an electronic release

To complete the procedure for installing LSIG, take the following steps:

1.With the circuit breaker open and preferably isolated, install the protection unit on the circuit breaker.

2.Power the unit ONLY from the battery unit.

3.If there are no errors other than configuration error (see par. 2.6.1), press and hold “i Test” button for a few seconds until all red LEDs start flashing confirming that installation is completed.

4.Remove the battery unit.

5.Power the relay from any supply (Vaux, battery unit).

6.Make sure there are no configuration errors (“Alive” LED glows).

7.Circuit breaker and release can now be commissioned.

2.6Definition of alarms and signals for the LSIG unit

2.6.1Optical signals

The following table shows how the LEDs are managed in accordance with IEC 60073 standard (clause 4.2.3.2 in particular).

The LED alerts about status of the function set on its zone; e.g. in the figure in par. 2.5 the LED referenced as 8 identifies status of function L. Also see the following table

Flashing	Flashing fast (2Hz)	LED flashing with	LED flashing with LED permanently ON
		two 0.5 sec pulses	one pulse	LED permanently ON
slowly (0.5 Hz)
		every 2 sec	every 3 sec

Type of information	All LEDs	Single LED	All LEDs	Single LED		All LEDs	Single LED	Single LED	All LEDs	Single LED
	RED	ORANGE	RED	RED	ORANGE	RED	ORANGE	ORANGE	RED	RED	ORANGE
TC error or TC disconnected			
CS error or disconnected	
Rating Plug/Installation error(1)						
Protection timer error				
Last trip (2)										
Test button pressed and									
no failure detected (3)
L pre-alarm											
Configuration error(4)					
Settings inconsistency							
Normal operation of relay (5)								
CB Undefined or		
CB status error

(1)RP disconnected or RP>Iu

(2)Information on the “Last trip” is displayed when the LED relating to the protection unit that has been tripped comes on. The LED remains on for 2 sec, or permanently if an outside power supply (from battery unit) is being used.

(3)The information is displayed with all LEDs on for as long as the test button is pressed and held, or for 2 sec.

(4)Installed values differ from stored values. Therefore, the relay must be installed (see 2.5.3).

(5)If other signals aren’t present, the unit’s operating mode is indicated 3 sec after the unit has been turned on.

DIR 1000587R0002 (L3821)

(10)

2.6.2Troubleshooting

The following table lists a series of typical service conditions, to help you understand and solve hypothetical faults or malfunctions.

N.B.:

1.Before consulting the following table, check for a few seconds for any optical signals provided by the LEDs.

2.FN indicates normal operation of the LSIG unit.

3.When the suggestions proposed do not lead to a solution of the problem, please contact AB assistance service.

No.	Situation		Possible causes	Suggestions
1	Trip test cannot be run	1.	Busbar current is > 0.	1.	FN
		2.	The TC is not connected	2.	Check TC connection (see par. 2.3.2)
		3.	Battery unit is disconnected	3.	Connect battery unit.
2	Trip times lower	1.	Threshold too low	1.	Correct threshold
	than expected	2.	Curve too low	2.	Correct curve
		3.	Incorrect neutral selection	3.	Correct Neutral adjustment
3	Trip times higher	1.	Threshold too high	1.	Correct threshold
	than expected	2.	Curve too high	2.	Correct curve
		3.	Curve type “t=k/I2”	3.	Select curve type “t=k”
		4.	Incorrect neutral selection	4.	Correct Neutral adjustment
4	Rapid trip, with I3=Off	Iinst tripped		FN short-circuit with high I
5	Earth fault current beyond threshold,	G function automatically inhibited		FN
		but no trip occurs
6	No expected trip	Function OFF		FN enable protection function if
				necessary
7	Abnormal LED switch-on			See par. 2.6.1
8	Unexpected trip			See par. 2.6.1
9	L LED (orange) flashing			FN

2.6.3In case of a fault

If the LSIG is suspected of being faulty, there are signs of malfunctions or it has generated an unexpected trip, we advise you to strictly follow the recommendations below:

1.Press “i Test” button (within 48 hours of opening the CB) and make a note of which LED is on, also recording type of CB, number of poles, any connected accessories, In, and serial number (see par. 2.4).

2.Prepare a brief description of opening (when did it take place?, how many times?, was it always under the same conditions? what type of load? what current? is the event reproducible?)

3.Send/communicate all information collected, together with CB circuit diagram, to your nearest AB Customer Assistance service.

Delivering comprehensive, accurate information to AB Assistance service will facilitate technical analysis of the problem encountered, and allow us to promptly carry out all actions useful for the user.

2.7 Accessories

2.7.1Battery unit

PR030/B power supply unit is a separate unit for powering relay, auto test and trip test, and checkings with open CB.

DIR 1000587R0002 (L3821)

(11)

3LSIG-MM Release - Identification

The LSIG-MM units available, with various protections, are illustrated in the following figure.

LSIG-MM

Protections

For all versions "U" "OT"

Optional module available

Communication module

3.1Specifications

3.1.1General

The LSIG-MM are high-performance self-powered protection units with Protection, Measurement, Data storage, Communication (optional) Self-test and Load control functions for 140G-N and 140G-NS range of 3- and 4-pole low-voltage air circuit breakers. The unit’s user interface also enables parameter setup and full prealarm and alarm management for protection and watchdog functions.

Basic protections available are:

Symbol	Protection against
L	overload with inverse long time delay
S	short-circuit with adjustable delay
I	instantaneous short-circuit
G	earth fault with adjustable delay
U	phase current unbalance
OT	temperature off-range
MM	maintenance module

The LSIG-MM can be installed on 3-pole CBs with and without an external neutral, or on 4-pole CBs.

Note that reference current is In (rated current defined by the front Rating Plug) and not Iu (uninterrupted rated current of the CB itself). Example: 140G-N 1200 with a 400 A Rating Plug has an Iu of 1200A and an In of 400 A.

The unit opens the circuit breaker in which it is installed by means of the TC, which takes effect directly on the device’s mechanical linkage. The protection unit is self-powered by current sensors.

The unit is made using digital microprocessor technology and interfaces with the user by means of a graphic display and keyboard.

3.1.2Electrical characteristics

Rated operating frequency	50/60 Hz ±10%
Pass band	3000 Hz max
Peak factor	6.3 max @ 2 In

3.1.2.1Self-powering

Self-powering enables protection unit to be powered with busbar current using current transformers.

Using this powering mode, unit’s protection functions are ensured, however, not the accessory functions regarding the modules. The characteristics are given in the table below:

General characteristics	relay enabling	display switch-on
Minimum 3-phase busbar current to enable the relay and switch on the display	>80 A	>160 A

DIR 1000587R0002 (L3821)

(12)

3.1.2.2Auxiliary power supply

External auxiliary power supply is provided using a galvanically-separated power pack.

Since auxiliary voltage needs to be isolated from the ground, “galvanically separated converters” in accordance with IEC standard 60950 (UL 1950) or equivalent IEC 60364-41 and CEI 64-8, have to be used to guarantee a current in common mode or leakage current (as defined in IEC 478/1 and CEI 22/3) no greater than 3.5 mA.

Presence of the auxiliary power supply enables the relay unit to be used even with the circuit breaker open, as well as powering all the modules. The characteristics of the power pack are given in the table below.

Characteristics	LSIG-MM Version
Auxiliary voltage
(galvanically separated)	24V DC ±20%
Maximum ripple	5%
Inrush current @ 24 V	~2 A for 5 ms
Rated power @ 24 V	~3 W

3.1.3 Environmental characteristics
Operating temperature	-25 °C ... +70 °C
Storage temperature	-40 °C ... +90 °C
Relative humidity	0% ... 98% with condensation
Degree of protection (with LSIG-MM installed in the CB)	IP 30

3.1.4Description of input/output

3.1.4.1Binary input

- K14/K15:	this input allows activating MM protection.
	The input is connected on K14 and K15 connectors.
	The signal is 0 (MM not active) ... 24 V (MM active)
	It is important to fulfill the right polarity:
	K14	(+)
	K15	(-)

3.1.4.2Binary output

- 95S/98S:	this output gives a feedback on MM protection status.
	If MM protection is active, the contact is closed, otherwise is open.

3.1.5Communication bus

External system bus, RS 485 physical interface, Modbus RTU protocol, baud rate 9600-19200 bps.

3.1.6Protection functions

The LSIG-MM units carry out the following independent protection functions:

1.Protection against overload with inverse time “L”;

2.Protection against short-circuit with adjustable delay “S”;

3.Protection against instantaneous short-circuit “I”;

4.Protection against earth fault with adjustable delay “G”;

5.Protection against instantaneous short circuit at high currents “I inst”;

6.Protection against phase unbalance “U”;

7.Protection against overtemperature “OT”;

8.Protection for maintenance mode “MM”;

The LSIG-MM units allow processing of current signal of neutral pole with different relationships relative to the value of the phases.

N.B.: Beyond 15.5xIn of current on the Ne, the protection is considered as being set to 100%.

A timing indication (message + “alarm” LED) is provided on unit’s display, which is activated during a protection alarm. It is disabled when the alarm condition ceases or when the protection has been tripped. When the circuit breaker opens, the page with “Trip” data is displayed (when “i Test” is pressed, or automatically when a Vaux is installed).

3.1.6.1RMS calculation

All protection functions perform their respective processing on the basis of the real rms value of currents and voltages (protection G is disabled for current values greater than 8In (where I4≥ 0.8In), greater than 6In (where 0.5In≤ I4<0.8In) and greater than 4In (where I4<0.5In).

If the waveform is distorted beyond the established limit (6.3@2 In), the tolerance for the calculation of the true rms value will increase.

3.1.6.2Harmonic distortion

The LSIG-MM units signal that a peak factor of 2.1 has been exceeded through a warning message and “warning” LED lighting up (remember that IEC 60947-2 standard annex “F” provides that the protection unit must operate correctly with a peak factor ≤ 2.1, up to 2xIn).

DIR 1000587R0002 (L3821)

(13)