Switch Disconnector
Switch Disconnector with Fuse 3NJ62
System Manual • 11/2009
Answers for infrastructure.
Introduction 1
Product description
2
Functions
3
Mounting
4
Configuration
5
Technical specifications
6
Dimensional drawings
7
Schematics
8
SENTRON
Switch Disconnectors with Fuses,
In-Line Design
3NJ62
System Manual
11/2009
711 6114-02 DS 03
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.
CAUTION
without a safety alert symbol, indicates that property damage can result if proper precautions are not taken.
NOTICE
indicates that an unintended result or situation can occur if the corresponding information is not taken into
account.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation for the specific task, in particular its warning notices and
safety instructions. Qualified personnel are those who, based on their training and experience, are capable of
identifying risks and avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be adhered to. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of the Siemens AG. The remaining trademarks in this
publication may be trademarks whose use by third parties for their own purposes could violate the rights of the
owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
Ordernumber: 3ZX1012-0NJ62-1AC1
Ⓟ 12/2009
Copyright © Siemens AG 2009.
Technical data subject to change
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 5
Table of contents
1 Introduction................................................................................................................................................ 7
2 Product description.................................................................................................................................... 9
2.1 Overview ........................................................................................................................................9
2.2 Benefits ........................................................................................................................................11
2.3 Application....................................................................................................................................11
2.4 Basic versions..............................................................................................................................12
2.5 Accessories..................................................................................................................................12
2.6 Design..........................................................................................................................................13
3 Functions................................................................................................................................................. 15
3.1 Mode of operation ........................................................................................................................15
3.2 Electronic fuse monitoring............................................................................................................17
3.3 Motorized operation .....................................................................................................................36
3.4 Connection method......................................................................................................................37
3.5 Current transformers and current transformer busbars ...............................................................37
3.6 Ammeters.....................................................................................................................................38
4 Mounting.................................................................................................................................................. 39
4.1 Mounting size 00..........................................................................................................................39
4.2 Mounting size 1............................................................................................................................46
4.3 Mounting sizes 2 and 3................................................................................................................53
5 Configuration ........................................................................................................................................... 61
5.1 Installation data............................................................................................................................61
5.2 Rated currents..............................................................................................................................62
5.3 Configuration rules.......................................................................................................................63
6 Technical specifications........................................................................................................................... 65
7 Dimensional drawings.............................................................................................................................. 77
7.1 2-/3-pole switch disconnectors.....................................................................................................77
7.2 4-pole switch disconnectors.........................................................................................................79
7.3 Position of the phases, terminal bolts, and current transformers ................................................80
7.4 Current transformers....................................................................................................................81
7.5 Ammeters.....................................................................................................................................83
Table of contents
3NJ62
6 System Manual, 11/2009, 711 6114-02 DS 03
8 Schematics .............................................................................................................................................. 85
8.1 Switching examples .................................................................................................................... 85
8.2 Terminal connection diagram of the multi-function plugs ........................................................... 92
8.2.1 Manually operated switch disconnectors .................................................................................... 92
8.2.2 Switch disconnectors with motorized operating mechanism ...................................................... 92
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 7
Introduction 1
Purpose of the manual
The "SENTRON 3NJ62 inline switch disconnectors with fuses" manual describes the basic
functions of the switchgear range. It contains information about selection, configuring, and
commissioning.
In addition to the main devices, it also includes details of accessories.
Furthermore, to facilitate configuration, the manual contains dimension drawings, circuit
diagrams, and technical specifications of the switchgear and accessories.
All explanations in the manual regarding sizes 00, 1, 2, and 3 relate to the BS versions.
However, please also refer to the technical specifications in chapter 6, which differ in a few
respects for the two fuse types (LV HRC and BS).
Usage in the manual LV HRC versions BS versions
3NJ624
3NJ625
Size 00 3NJ620
3NJ626
Size 1 3NJ621 3NJ627
Size 2 3NJ622 3NJ628
Size 3 3NJ622 3NJ623
Required basic knowledge
A general knowledge of low-voltage controls and distribution is required to understand this
manual.
Symbols used in the text
The following table explains the meaning of the various symbols used within this document:
Symbol Meaning
LED illuminated
LED not illuminated
Introduction
3NJ62
8 System Manual, 11/2009, 711 6114-02 DS 03
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 9
Product description 2
2.1 Overview
All key product features at a glance
● Type tested according to IEC EN 60947-3
● Voltage levels to 690 V AC and 440 V DC
● 160 A to 630 A for LV HRC fuse links according to IEC 60269-1 / EN 60269-1 or fuse
links according to BS 88
● 2-/3-/4-pole versions available
● 185 mm center-to-center clearance of plug-in contacts
● Developed for switchgears in plug-in design
● Horizontal or vertical mounting position
● Front panel locked in ON position
● Degree of protection IP41
● With electronic fuse monitoring devices (EFM)
● Manually operated or with motorized operating mechanism
Size 00 Size 1 Sizes 2 and 3
Product description
2.1 Overview
3NJ62
10 System Manual, 11/2009, 711 6114-02 DS 03
Overview of components and accessory parts
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19
20
21
22
3NJ62 switch disconnector basic device,
here in size 00, open, without front panel
Manually operated mechanism
Motorized operating mechanism
Connection module
Blanking cover for empty sections
Guide rails
Busbar cover
Contact extension
Current transformer
Current transformer busbar
Terminals
Stud terminal
Terminal cover
Multi-function plugs
Holder for measuring instrument with electronic fuse monitoring device (EFM10)
Holder for measuring instrument with electronic fuse monitoring device (EFM20/25)
Holder for measuring instruments without EFM
Bi-metal measuring instrument
Moving-iron measuring instrument
BS fuse
LV HRC fuse
Auxiliary switch
Product description
2.2 Benefits
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 11
2.2 Benefits
Advantages for switchgear manufacturers
● Compact, modular design
● Simple and efficient mounting due to incoming plug-in contact
● High packing density in the field
● Cable connection with clamps or lugs
● Can be mounted in different control cabinet depths
● Comprehensive range of accessories
Advantages for users
● Conversion, retrofitting, and replacement without switching off the switchgear
● Dead-state fuse replacement
● Maintenance free
● High personnel safety
● Operating handle can be locked in OFF position
● Clear and unambiguous switch position indicator
2.3 Application
The plug-in 3NJ62 switch disconnectors with fuses are installed in low-voltage distribution
boards where a minimum amount of space is available for a maximum number of cable
ducts to the power distribution. They can be easily fitted in all common control cabinets
(minimum depth: 400 mm).
The plug-in 3NJ62 switch disconnectors with fuses are available for rated uninterrupted
currents of 160 A to 630 A. LV HRC fuse links according to IEC 60269-1 / EN 60269-1 or BS
fuse links according to BS 88 provide overload and short-circuit protection up to 690 V
AC/440 V DC.
The switch disconnectors can be retrofitted at any time with electronic fuse monitoring
devices, auxiliary switches, an ammeter (48 mm x 48 mm), and up to four current
transformers, with no extra space required. For installation in control cabinets with a depth >
400 mm, the mounting depth of the disconnectors can be increased by 200 mm using a
contact extension. Further installation accessories, such as guide rails and blanking covers
for empty sections, complete the product range.
Product description
2.4 Basic versions
3NJ62
12 System Manual, 11/2009, 711 6114-02 DS 03
2.4 Basic versions
Basic version types
The 3NJ62 product range comprises four sizes covering the current range up to 630 A. All
types are designed as 2-/3-/4-pole switch disconnectors with fuses. The devices are suitable
for use at up to 690 V AC/440 V DC.
The basic versions are divided into the following types:
LV HRC fuses BS fuses Switching
capacity
Operation
2-pole 3-pole 4-pole 2-pole 3-pole 4-pole
Manual - 160...630 A 160...630 A - - 160...630 A Standard 1)
Motorized - - 160...630 A - - 160...630 A
Manual 160...630 A 160...630 A - 160...630 A 63...630 A - High 2)
Motorized 160...630 A 160...630 A - 160...630 A 160...630 A -
1) Standard switching capacity:
• Utilization category AC22B
• Rated short-circuit making capacity 55 kA
2) High switching capacity:
• Utilization category AC23B
• Rated short-circuit making capacity 66 kA
2.5 Accessories
The following accessories are available in addition to the main devices:
● Electronic fuse monitoring devices
● Current transformers
● Ammeters
● Auxiliary switches
● Multi-function plugs
● Terminals
● Terminal covers
● Guide rails
● Blanking covers
● Busbar covers
Product description
2.6 Design
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 13
2.6 Design
Compact and modular design
All sizes fit busbar systems with a 185 mm center-to-center clearance, and have the same
width and depth as well as a uniform 50 mm grid with regard to mounting height (50, 100, or
200 mm). This enables an in-line disconnector panel to be set up with any combinations of
different sizes.
Subsequent replacement of in-line disconnectors of different sizes is easy. Furthermore, the
user-friendly hinged handle is retractable in both the ON and the OFF state, so that the
compact design is retained in both switch positions.
On device versions with a motorized operating mechanism the motor is integrated in the
contour of the housing.
The electronic fuse monitoring device (EFM) can be upgraded as an accessory or it can be
supplied ready mounted from the factory.
Product description
2.6 Design
3NJ62
14 System Manual, 11/2009, 711 6114-02 DS 03
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 15
Functions 3
3.1 Mode of operation
Operation
The plug-in switch disconnectors are fitted with a snap-action mechanism and are switched
by turning the handle approx. 45°. Once actuated, the handle is folded against the front
panel in the ON or OFF position for safety reasons.
Indication
A unique switch position indication is output by the indicator in the inspection window of the
in-line disconnector (ON "I" = red, OFF "O" = green). The switch position indicator is
mechanically linked to the moving switching contacts.
Voltage test
In the event of a voltage test on the fuse links, the transparent insert in the front panel is
opened.
Personnel safety
The switch disconnectors are type tested according to IEC 60947-3 and have degree of
protection IP41 in the operating state.
The special locking mechanism on the handle ensures that the in-line disconnector must be
switched off before it is possible to open the cover and remove the fuses. A switchgear key
according to DIN 43668 is also required to open the cover.
Disconnection during the switching operation (snap-action mechanism) is implemented
before and after the fuse link. This ensures that, if power is supplied over the busbars or via
the cable connecting side, the fuse links are in a dead state when switched off.
Locking
In the OFF position, the handle can be padlocked (padlock Ø: 6 mm) to protect against
unintentional restarting.
Functions
3.1 Mode of operation
3NJ62
16 System Manual, 11/2009, 711 6114-02 DS 03
Switch position
OFF ON
"OFF" position, display "ON" position, display
"OFF" position, operating lever in OFF position "ON" position, operating lever in OFF position
"OFF" position, operating lever in end position "ON" position, operating lever in end position
Functions
3.2 Electronic fuse monitoring
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 17
3.2 Electronic fuse monitoring
Electronic fuse monitoring devices EFM - overview
The electronic fuse monitoring devices EFM 10 and EFM 20/25 are mounted at the factory in
the 3NJ62 or must be installed as accessory 3NJ69 by the customer. The EFM 10 and the
EFM 20 for monitoring AC systems (up to Uin = 690 V) work regardless of whether or not a
load is present. They detect, signal, and indicate the states of the fuses. The EFM 25 is
designed for monitoring DC systems (up to Uin = 440 V).
Figure 3-1 3NJ62 size LV HRC1 with electronic fuse monitoring device (EFM 10)
Figure 3-2 3NJ62 size LV HRC1 with electronic fuse monitoring device (EFM 20/25)
Functions
3.2 Electronic fuse monitoring
3NJ62
18 System Manual, 11/2009, 711 6114-02 DS 03
Typical applications of the EFM
● If a fuse fails, a "general fault" is signaled to a control room by means of integrated
auxiliary switches (1 signaling relay with 1 changeover contact).
● If a fuse fails, a load is disconnected, e.g. via the optional integral motorized operating
mechanism.
Possible areas of application for the EFM
The 3NJ62 switch disconnector with fuse may be used as follows to ensure safe isolation in
conjunction with the EFM:
● EFM 10 and EFM 20: 3-phase, sine wave AC systems (50/60 Hz) up to 690 V
● EFM 25: DC systems up to 440 V
Principle of the EFM 10
The electronic fuse monitoring device EFM 10 is supplied via the phases of the AC system. It
works according to the closed-circuit principle: The signaling relay is normally energized (no
fault). The electronic fuse monitoring device measures the voltages upstream and
downstream of the three fuses. If the voltage drop at one of the three fuses exceeds 13
V ± 10%, the following operating states occur:
● The electronic fuse monitoring device trips
● The signaling relay (changeover contact) drops out as the general alarm output
● The red LED on the fuse concerned lights up.
The red LED and the signaling relay always indicate the current states of the fuses. The
states are not stored.
The green LED indicates that power is being supplied to the electronic fuse monitoring
device.
Functions
3.2 Electronic fuse monitoring
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 19
Circuit diagram of the EFM 10
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WARNING
The green LED does not light up if the electronic fuse monitoring device is connected in a
way other than that described above when the infeed is live and more than one fuse is
faulty! In this case, the EFM's internal power supply can no longer be guaranteed (refer to
"Voltage tap for the internal power supply and direction of the incoming supply" below)!
WARNING
If the EFM is built into the 3NJ62 and not all lines of the changeover contact are wired to
the multi-function plug, the exposed cable ends must be electrically insulated.
Functions
3.2 Electronic fuse monitoring
3NJ62
20 System Manual, 11/2009, 711 6114-02 DS 03
Principle of the EFM 20
The electronic fuse monitoring device EFM 20 is supplied via the three phases L1, L2, and
L3 of the AC system. It works according to the closed-circuit principle (default setting): The
signaling relay is normally energized (no fault). The electronic fuse monitoring device
measures the voltages upstream and downstream of the three fuses. If the voltage drop at
one of the three fuses exceeds 13 V ± 10%, the following operating states occur:
● The electronic fuse monitoring device trips
● The signaling relay drops out
● The corresponding signal is indicated on the display
If line monitoring is active, the following signals may also be output:
● "Undervoltage" line function active
● "Overvoltage" line function active
● "Phase failure" line function active
The illuminated display indicates that power is being supplied to the electronic fuse
monitoring device.
Functions
3.2 Electronic fuse monitoring
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 21
Circuit diagram of the EFM 20
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Figure 3-4 3NJ62 size LV HRC00, internal wiring with EFM 20
WARNING
The display is not illuminated if the electronic fuse monitoring device is connected in a way
other than that described above when the infeed is live and more than one fuse is faulty! In
this case, the EFM's internal power supply can no longer be guaranteed (refer to "Voltage
tap for the internal power supply and direction of the incoming supply" below)!
WARNING
If the EFM is built into the 3NJ62 and not all lines of the changeover contact are wired to
the multi-function plug, the exposed cable ends must be electrically insulated.
Functions
3.2 Electronic fuse monitoring
3NJ62
22 System Manual, 11/2009, 711 6114-02 DS 03
Cable designation
Size
LV HRC 00 LV HRC 1 LV HRC 2, LV
HRC 3
Terminal designation Cable color
Cable designation
X1 (L1) Black 1 11 21
X2 (L1) Black 4 14 24
X3 (L2) Black 2 12 22
X4 (L2) Black 5 15 25
X5 (L3) Black 3 13 23
Pick-off at fuse holders
with AC
(infeed plug-in contacts)
X6 (L3) Black 6 16 26
X1 (+) Black 1 11 21
X2 (+) Black 4 14 24
X3 Black - - -
X4 Black - - -
X5(-) Black 3 13 23
Pick-off at fuse holders with
DC
(infeed plug-in contacts)
X6 (-) Black 6 16 26
Relay 1 Base point Gray 11 21 31
NC contact Gray 12 22 32
NO contact Gray 14 24 34
Relay 2 Base point Gray 41 51 61
NC contact Gray 42 52 62
NO contact Gray 44 54 64
Functions
3.2 Electronic fuse monitoring
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 23
Principle of the EFM 25
The electronic fuse monitoring device EFM 25 is supplied via the two poles L+ and L- of the
DC system. It works according to the closed-circuit principle (default setting): The signaling
relay is normally energized (no fault). The electronic fuse monitoring device measures the
voltages upstream and downstream of the two fuses. If the voltage drop at one of the fuses
exceeds 20 V ± 10%, the following operating states occur:
● The electronic fuse monitoring device trips
● The signaling relay drops out
● The corresponding signal is indicated on the display.
If line monitoring is active, the following signals may also be output:
● "Undervoltage" line function active
● "Overvoltage" line function active
The illuminated display indicates that power is being supplied to the electronic fuse
monitoring device.
Functions
3.2 Electronic fuse monitoring
3NJ62
24 System Manual, 11/2009, 711 6114-02 DS 03
Circuit diagram of the EFM 25 for voltages up to 440 V DC
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WARNING
The display is not illuminated if the electronic fuse monitoring device is connected in a way
other than that described above when the infeed is live and more than one fuse is faulty! In
this case, the EFM's internal power supply can no longer be guaranteed!
WARNING
If the EFM is built into the 3NJ62 and not all lines of the changeover contact are wired to
the multi-function plug, the exposed cable ends must be electrically insulated.
Short-circuit protection of the EFM 25:
Max. protection: "DIAZED 2 A gLgG" fuse
Functions
3.2 Electronic fuse monitoring
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 25
Operation of the EFM 20 and EFM 25
To activate SETUP or RUN mode, press the "Enter" key for longer than 2 seconds. The
memory function is activated by means of the setup functions.
2 pushbutton units for setting values
1 "Enter" pushbutton unit for selecting the
mode and "branching" within the menu
ENTER
WARNING
The fuse or the line is not monitored in SETUP mode. Monitoring is only assured in RUN
mode.
If line monitoring is active, the voltage limits are monitored. If one of the voltages exceeds or
falls below the limit, relay 2 drops out providing closed-circuit principle is selected (see
below). The symbol for undervoltage or overvoltage appears on the display.
If a fault occurs, the relays respond according to the selected operating principle after the set
error delay time (Del):
Functions
3.2 Electronic fuse monitoring
3NJ62
26 System Manual, 11/2009, 711 6114-02 DS 03
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Functions
3.2 Electronic fuse monitoring
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 27
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You acknowledge an alarm by simultaneously pressing the Up and Down keys (only if the
memory function is active).
NOTICE
All alarms should be acknowledged, even if they are no longer present!
If several alarms are present, only the alarm with the highest priority is actually displayed. An
alarm for a faulty fuse takes priority over all others (refer to the alarm priorities below).
Functions
3.2 Electronic fuse monitoring
3NJ62
28 System Manual, 11/2009, 711 6114-02 DS 03
Menu structure on the display of the EFM 20 (AC)
Legend:
● RUN: Operating mode
WARNING
The fuse or the line is not monitored in SETUP mode. Monitoring is only assured in
RUN mode.
● U1-2, U2-3, U3-1: phase-to-phase voltages
● Value: Value range (195 V to 790 V)
● TEST 1, TEST 2: Test on relay 1, test on relay 2
● SET?: Setup mode
● Hyst: Hysteresis (fluctuation range) in V (1 V - 20 V, default setting: 5 V)
● Del: Delay time after which a fault is indicated (0.1 to 20 s), e.g. in a system with large
voltage fluctuations or if the motor that is used draws a very high current on starting
● Mem?: Save yes / no
● NC: Normally closed - closed-circuit principle, i.e. the relay is energized (default setting)
● NO: Normally Open: open-circuit principle
● 1 2? : Contactor 2 responds like contactor 1
● Func 2? : Contactor 2 responds to overvoltage/undervoltage/phase failure
● Error: Fault indication
● RES?: Reset fault indication
● Memory?: Save fault indication yes / no
● L1 : Voltage at the fuses: Lower threshold value undershot
● U1-2 : Phase-to-phase voltage: Lower threshold value undershot
● U1-2 : Phase-to-phase voltage: Upper threshold value exceeded
● L1 : Phase failure L1
Functions
3.2 Electronic fuse monitoring
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 29
Functions
3.2 Electronic fuse monitoring
3NJ62
30 System Manual, 11/2009, 711 6114-02 DS 03
1)
On
Del
Off
12 44
11
14
41
42
2)
Upper limit exceeded:
No limit violation:
Lower limit undershot:
3) Functions or indication are only active if line monitoring is activated
4) If the memory function is active, the fault indication alternates with the following symbol:
2)1)
Functions
3.2 Electronic fuse monitoring
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 31
Menu structure on the display of the EFM 25 (DC)
Legend:
● RUN: Operating mode
WARNING
The fuse or the line is not monitored in SETUP mode. Monitoring is only assured in
RUN mode.
● U =: Line-to-line voltage
● Value: Value range (190 V to 510 V)
● TEST 1, TEST 2: Test on relay 1, test on relay 2
● SET?: Setup mode
● Hyst: Hysteresis (fluctuation range) in V (1 V - 20 V, default setting: 5 V)
● Del: Delay time after which a fault is indicated (0.1 to 20 s)
● Mem?: Save yes / no
● NC: Normally closed - closed-circuit principle, i.e. the relay is energized (default setting)
● NO: Normally Open: open-circuit principle
● 1 2? : Contactor 2 responds like contactor 1
● Func 2? : Contactor 2 responds to overvoltage/undervoltage/phase failure
● Error: Fault indication
● RES?: Reset fault indication
● Memory?: Save fault indication yes / no
● L+ , L- : Voltage at the fuse: Lower threshold value undershot
● U = : Line-to-line voltage: Lower threshold value undershot
● U = :Line-to-line voltage: Upper threshold value exceeded
Functions
3.2 Electronic fuse monitoring
3NJ62
32 System Manual, 11/2009, 711 6114-02 DS 03
Functions
3.2 Electronic fuse monitoring
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 33
1)
On
Del
Off
12 44
11
14
41
42
2)
Upper limit exceeded:
No limit violation:
Lower limit undershot:
3) Functions or indication are only active if line monitoring is activated
4) If the memory function is active, the fault indication alternates with the following symbol:
2)1)
Alarm priorities on the EFM 20-25
Priority Alarm Function type Remarks
1 Phase failure Line monitoring AC version only. The fault (phase or fuse failure) that was
detected first in the monitoring sequence from L1 to L2 to
L3 is indicated.
2 Fuse faulty Fuse monitoring device DC version: A faulty fuse can only be detected if a load is
connected.
3 Overvoltage Line monitoring —
4 Overvoltage Line monitoring —
If several alarms are present, only the alarm with the highest priority is actually displayed.
Functions
3.2 Electronic fuse monitoring
3NJ62
34 System Manual, 11/2009, 711 6114-02 DS 03
Voltage tap for the internal power supply and direction of the incoming supply on all EFMs, taking the
EFM 10 as an example
The EFM electronics are supplied via the phases (L1, L2, L3 or L+, L-) of the main circuit.
The voltage for the internal power supply is always tapped at the fuse holders on the side of
the rear plug-in contacts. Owing to the internal power supply, the electronics are only fully
functional if the 3NJ62 is switched on and at least two phases on the input side are supplied
with power.
① Infeed
② Outgoing feeder
WARNING
The green LED on the EFM 10 does not light up, and the display of the EFM 20 or the EFM
25 is not illuminated, if the electronic fuse monitoring device is connected in a way other
than that described above when the infeed is live and more than one fuse is faulty! In this
case, the EFM's internal power supply can no longer be guaranteed!
Functions
3.2 Electronic fuse monitoring
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 35
WARNING
If the green LED does not light up or the display is not illuminated when the infeed is live
and the EFM is correctly connected, the EFM must be immediately replaced!
The table below shows:
● The number of tripped fuses
● Whether or not the electronics are active
● The "Fault" signal
as a function of the voltage tap (infeed side, outgoing side).
Table 3- 1 Number of tripped fuses, electronics active or not active and fault signal as a function of the voltage tap
(infeed side, outgoing side) on the EFM 10/20
Number of tripped fuses Electronics active Fault signal
AC 1) DC 2) AC DC AC DC
0 0 Yes Yes No No
1 1 Yes Yes Yes Yes
2 2 Yes Yes Yes Yes
Voltage tap for
electronics = infeed side
of the main conducting
paths. Infeed correct: see
pictures above 3 — Yes — Yes —
0 0 Yes Yes No No
1 1 Yes No Yes Relay returns to the
deenergized state (closed-
circuit principle)
2 2 No No Relay returns to the deenergized state
(closed-circuit principle)
Voltage tap for
electronics = outgoing
side of the main
conducting paths
3 — No — Relay returns to the deenergized state
1) AC ≙ EFM 10/20
2) DC ≙ EFM 25
Functions
3.3 Motorized operation
3NJ62
36 System Manual, 11/2009, 711 6114-02 DS 03
3.3 Motorized operation
Motorized operation features
● The motor is installed in the factory.
● The motor is completely installed in the in-line disconnector without changing its
dimensions.
● The operating buttons are protected by a transparent cover and can also be padlocked
(padlock Ø: 6 mm)
● Emergency stop function if the motor voltage fails by operating with a size 3 Allen key
● Local or remote operation
● External connection by means of the 18-pole multi-function plug fitted in the factory
Manual operation
Figure 3-8 Motorized operation
Functions
3.4 Connection method
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 37
3.4 Connection method
All plug-in switch disconnectors are supplied for connection with a cable lug as standard.
Terminals are also available as optional accessories.
3.5 Current transformers and current transformer busbars
Current transformers
Size Primary
current
Secondary
current
Accuracy class Feed-through opening
50 A 1 A, 5 A Class 1 ∅ 21 mm
Class 1, class 0.5 ∅ 21 mm
Size 00
100 A, 150 A 1 A, 5 A
Class 0.5, calibrated ∅ 14 mm
50 A 1 A, 5 A Class 1 Size 1
100 A, 150 A,
200 A, 250 A
1 A, 5 A Class 1, class 0.5
∅ 21 mm
Size 2 /
size 3
300 A, 400 A,
500 A, 600 A
1 A, 5 A Class 1, class 0.5
Class 0.5, calibrated
∅ 32 mm
Current transformers are not allowed to be operated at no load because this could lead to
hazardous voltages at the terminals.
If four current transformers are used, the fourth transformer is in phase L3 for size 00, phase
L2 for size 1, or phase L1 for sizes 2 and 3.
If the fourth current transformer has size 00 or 1, the multi-function plug cannot be fitted
because there is not enough space. A current transformer cannot be installed in the N
conductor of 4-pole devices.
Current transformer busbars
Order no. of current transformer busbars for Size
1 current
transformer
3 current
transformers
4 current
transformers
Size 00
Current transformer with ∅ 21 mm 3NJ69 20-3DB00 3NJ69 20-3DC00 3NJ69 20-3DD00
Current transformer with ∅ 14 mm 3NJ69 20-3DE00 3NJ69 20-3DF00 3NJ69 20-3DG00
Size 1
Current transformer with ∅ 21 mm 3NJ69 30-3DB00 3NJ69 30-3DC00 3NJ69 30-3DD00
Size 2 / size 3 No current transformer busbars required
Functions
3.6 Ammeters
3NJ62
38 System Manual, 11/2009, 711 6114-02 DS 03
3.6 Ammeters
According to DIN 43718, an ammeter with dimensions 48 mm x 48 mm can be used to
measure the current. It can be a moving-iron measuring instrument or a bi-metal measuring
instrument.
A holder for ammeters can be ordered as a separate accessory.
Holder for ammeters Ammeter: moving-iron measuring instrument
(left) and bi-metal measuring instrument
(right)
In the case of device versions with electronic fuse monitoring (EFM), the holder for
ammeters is installed in the factory.
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 39
Mounting 4
4.1 Mounting size 00
Installing the plates for device versions with a motorized operating mechanism in the control cabinet
Mounting
4.1 Mounting size 00
3NJ62
40 System Manual, 11/2009, 711 6114-02 DS 03
Installing device versions with a motorized operating mechanism in the control cabinet
Installation in the control cabinet
PP
Mounting
4.1 Mounting size 00
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 41
Removing the EFM
Installing / removing the EFM in / from the control cabinet
PP
Mounting
4.1 Mounting size 00
3NJ62
42 System Manual, 11/2009, 711 6114-02 DS 03
Emergency mode
Installing 4-pole device versions with a motorized operating mechanism in the control cabinet
Mounting
4.1 Mounting size 00
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 43
Overview
Note
The multi-function plug and the electronic fuse monitor (EFM) must be dismantled in order to
install accessories.
Mounting
4.1 Mounting size 00
3NJ62
44 System Manual, 11/2009, 711 6114-02 DS 03
Installing the current transformer and the multi-function plug
WARNING
The current transformers must not be operated with an open circuit.
Mounting
4.1 Mounting size 00
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 45
Wiring of the auxiliary switches
O
Figure 4-1 Cable lengths
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(QGVOHHYHV
)RULQVFULSWLRQV
VHHWDEOH
+9.PP
sPP
PP
6WULSSHG
PP
6WULSSHG
Size 00 Color: Black
Version Current transformer Auxiliary switch
Inscription L1K 1 L1L 2 L2K 3 L2L 4 L3K 5 L3L 6 -1 11 -2 12 -3 13 -2 14
I [mm] 250 250 200 210 180 190 310 410 450 290
Mounting
4.2 Mounting size 1
3NJ62
46 System Manual, 11/2009, 711 6114-02 DS 03
4.2 Mounting size 1
Installing the plates for device versions with a motorized operating mechanism in the control cabinet
Mounting
4.2 Mounting size 1
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 47
Installing device versions with a motorized operating mechanism in the control cabinet
Installation in the control cabinet
PP
Mounting
4.2 Mounting size 1
3NJ62
48 System Manual, 11/2009, 711 6114-02 DS 03
Removing the EFM
Installing / removing the EFM in / from the control cabinet
PP
Mounting
4.2 Mounting size 1
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 49
Emergency mode
Installing 4-pole device versions with a motorized operating mechanism in the control cabinet
Mounting
4.2 Mounting size 1
3NJ62
50 System Manual, 11/2009, 711 6114-02 DS 03
Overview
Note
The multi-function plug and the electronic fuse monitor (EFM) must be dismantled in order to
install accessories.
Mounting
4.2 Mounting size 1
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 51
Installing the current transformer and the multi-function plug
WARNING
The current transformers must not be operated with an open circuit.
Mounting
4.2 Mounting size 1
3NJ62
52 System Manual, 11/2009, 711 6114-02 DS 03
Wiring of the auxiliary switches
O
Figure 4-2 Cable lengths
,6HHWDEOH
(QGVOHHYHV
)RULQVFULSWLRQV
VHHWDEOH
+9.PP
sPP
PP
6WULSSHG
PP
6WULSSHG
Size 1 Color: Brown
Version Current transformer Auxiliary switch
Inscription L1K 1 L1L 2 L2K 3 L2L 4 L3K 5 L3L 6 -1 11 -2 12 -3 13 -2 14
I [mm] 290 300 170 170 220 240 450 450 460 500
Mounting
4.3 Mounting sizes 2 and 3
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 53
4.3 Mounting sizes 2 and 3
Installing the plates for device versions with a motorized operating mechanism in the control cabinet
Mounting
4.3 Mounting sizes 2 and 3
3NJ62
54 System Manual, 11/2009, 711 6114-02 DS 03
Installing device versions with a motorized operating mechanism in the control cabinet
Installation in the control cabinet
PP
Mounting
4.3 Mounting sizes 2 and 3
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 55
Removing the EFM
Installing / removing the EFM in / from the control cabinet
PP
Mounting
4.3 Mounting sizes 2 and 3
3NJ62
56 System Manual, 11/2009, 711 6114-02 DS 03
Emergency mode
Installing 4-pole device versions with a motorized operating mechanism in the control cabinet
Mounting
4.3 Mounting sizes 2 and 3
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 57
Overview
Note
The multi-function plug and the electronic fuse monitor (EFM) must be dismantled in order to
install accessories.
Mounting
4.3 Mounting sizes 2 and 3
3NJ62
58 System Manual, 11/2009, 711 6114-02 DS 03
Installing the current transformer and the multi-function plug
WARNING
The current transformers must not be operated with an open circuit.
Mounting
4.3 Mounting sizes 2 and 3
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 59
Wiring of the auxiliary switches
O
Figure 4-3 Cable lengths
,6HHWDEOH
(QGVOHHYHV
)RULQVFULSWLRQV
VHHWDEOH
+9.PP
sPP
PP
6WULSSHG
PP
6WULSSHG
Size 2 / size 3 Color: Blue
Version Current transformer Auxiliary switch
Inscription L1K 1 L1L 2 L2K 3 L2L 4 L3K 5 L3L 6 -1 11 -2 12 -3 13 -2 14
I [mm] 760 790 670 670 560 570 300 300 300 300
Mounting
4.3 Mounting sizes 2 and 3
3NJ62
60 System Manual, 11/2009, 711 6114-02 DS 03
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 61
Configuration 5
5.1 Installation data
3NJ62 switch disconnectors
Type of
LV HRC
version
Type of
BS version
Rated current
[A]
Size Height requirements of in-
line disconnectors
[mm]
3NJ6202 3NJ6262 160 00 50
3NJ6212 3NJ6272 250 1 100
3NJ6222 3NJ6282 400 2 200
3NJ6232 3NJ6292 630 3 200
3NJ6243 63 00 50
3NJ6253 100 00 50
3NJ6203 3NJ6263 160 00 50
3NJ6213 3NJ6273 250 1 100
3NJ6223 3NJ6283 400 2 200
3NJ6233 3NJ6293 630 3 200
3NJ6204 3NJ6264 160 00 100
3NJ6214 3NJ6274 250 1 150
3NJ6224 3NJ6284 400 2 250
3NJ6234 3NJ6294 630 3 250
Further built-in components
Type Designation Height
requirements
[mm]
3NJ69 00-4CB00 Blanking covers for empty compartments / connection
module
50
3NJ69 15-3BA00 Connection module 400 A for device compartment (without
front panel)
50
Configuration
5.2 Rated currents
3NJ62
62 System Manual, 11/2009, 711 6114-02 DS 03
5.2 Rated currents
● Rated currents of device sizes = 0.8 x IN of the biggest fuse link
● For summation current of all feeders in the SIVACON cubicle: Rated current ≤ 2000 A
Device size Fuse IN
[A]
Rated current = 0.8 x IN
[A]
160 125
125 100
00
80 64
250 200
224 180
1
125 100
400 320
355 284
2
315 252
630 504
500 400
3
400 320
Configuration
5.3 Configuration rules
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 63
5.3 Configuration rules
Configuration rules for ventilated SIVACON cubicles with 3NJ62 switch disconnectors with fuses
● Equipment in the cubicle, from top to bottom, decreasing from size 3 to size 00
● Recommended maximum configuration per cubicle: approx. 2/3, including reserve
● Disconnectors of size 2 and 3 should - where possible - be distributed between different
cubicles
● Summation current of all feeders in the cubicle: max. 2000 A
● Rated currents of device sizes = 0.8 x IN of the biggest fuse link
● Rated currents of smaller fuse links of one size = 0.8 x IN of the fuse link
For the fully equipped cubicle, the rated diversity factor according to IEC 60439-1 applies.
Failure to comply with these instructions may lead to premature ageing of fuses and
uncontrolled tripping as a result of local overheating.
All data refers to an ambient temperature of the switchgear of 35°C (24-hour average value).
Rated diversity factor according to IEC 60439-1
Number of main circuits Rated diversity factor
2 and 3 0.9
4 and 5 0.8
6 to 9 0.7
10 or more 0.6
Rated current of the fuse links
● Summation current of all feeders in the cubicle ≤ 2000 A = 0.8 x IN of fuse
Configuration
5.3 Configuration rules
3NJ62
64 System Manual, 11/2009, 711 6114-02 DS 03
Blanking covers
In-line disconnector
size
Permissible
current
(continuous load
current at 35°C
system ambient
temperature)
Total covered height to be
allocated
(for recommended
arrangement of blanking
covers, see right)
Arrangement of in-line disconnectors +
associated blanking covers
(blanking covers with ventilation slots,
50 mm high)
In-line disconnector
size 3
(group formation not
permissible)
≥ 440 A to 500 A
of single device
200 mm = 4 units per in-line
disconnector
,
1
 $
In x 0.8 = 500 A
= permissible
continuous load
current
< 440 A of single
device
150 mm = 3 units per in-line
disconnector
HJ,1 $
In x 0.8 = 400 A
= permissible
continuous load
current
In-line disconnector
size 2
(group formation not
permissible)
≤ 320 A of single
device
50 mm = 1 unit per in-line
disconnector
HJ,1 $
In x 0.8 = 284 A
= permissible
continuous load
current
Groups of in-line
disconnectors, sizes 00
and 1
≤ 400 A =
summation current
of fuse links
group x 0.8
100 mm = 2 units per group
,
1
 $
,
1
 $
,
1
 $
,
1
 $
Total
In x 0.8 ≤ 400 A
= permissible
continuous load
current
(Total 1 to In) x α
= permissible
continuous load
current
Any sized groups of in-
line disconnectors of
size 00
≤ 64 A of single
device
100 mm = 2 units per group
In combination with size 2 and
3 in one cubicle, the rated
currents are 280 A for size 2
and 440 A for size 3.
Devices of sizes 2 and 3 must
be allocated blanking covers
(see above).
,
1
 $
,
1
 $
,
1
 $
,
1
 $
Q
Q
α = Rated diversity
factor
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 65
Technical specifications 6
Standards EN/IEC 60947-3
Size Size 00
LV
HR
C
3NJ6202-3
3NJ6202-4
3NJ6203-1
3NJ6204-1
3NJ6204-2
3NJ6203-3
3NJ6203-4
Type
BS 3NJ6243-3 3NJ6253-3 3NJ6262-3
3NJ6262-4
3NJ6263-3
3NJ6263-4
Switching capacity H H H S H
Rated insulation voltage Ui V 1000
Rated impulse voltage Uimp V 8000
For LV HRC fuse links according to
IEC 60269
- - 00 and 000
For BS fuse links according to BS 88
* = fuse links from Lawson Fuses based
on BS 88
A3 A3 00T*
Rated operational current Ie for fuse
links according to IEC 60269 / BS 88
A
63
100
160
160
125
160
125
Rated operational voltage Ue
at 50 / 60 Hz rated frequency
with DC
V
690
690
-
230
-
440
500
690
500
690
Utilization category AC23B AC23B DC23B DC21B AC22B AC23B
Rated conditional short-circuit current
Short-circuit strength (rms value)
Short-circuit making capacity (rms
value)
kA
kA
100
66
100
66
60
60
100
55
100
66
Rated making capacity
cos φ = 0.65
cos φ = 0.45
cos φ = 0.35
A
A
A
-
630
-
-
1000
-
-
-
-
-
-
-
480
-
-
375
-
-
-
-
1600
-
-
1250
Rated breaking capacity
cos φ = 0.65
cos φ = 0.45
cos φ = 0.35
A
A
A
-
504
-
-
800
-
-
-
-
-
-
-
480
-
-
375
-
-
-
-
1280
-
-
1000
Endurance
Operating cycles, total
Operating cycles, electrical (690 V,
cos φ = 0.65)
2000
300
2000
300
1600
200
Power loss (without fuse links) W 7 17 43
Permissible ambient temperature °C - 5 ... + 55
Permissible mounting positions Horizontal or vertical with bottom connection
Degree of protection (in operating state) IP41
Technical specifications
3NJ62
66 System Manual, 11/2009, 711 6114-02 DS 03
Standards EN/IEC 60947-3
Size Size 00
LV
HR
C
3NJ6202-3
3NJ6202-4
3NJ6203-1
3NJ6204-1
3NJ6204-2
3NJ6203-3
3NJ6203-4
Type
BS 3NJ6243-3 3NJ6253-3 3NJ6262-3
3NJ6262-4
3NJ6263-3
3NJ6263-4
Main circuit connection
Cable lug connection, conductor cross-
section
(Al/Cu, solid or stranded)
according to DIN 46235 (Cu) and
DIN 46239 (Al)
mm2
mm2
1x 10-95
2x 16-70
Screw size M8
Torque Nm 15
Cable clamp connection, conductor
cross-section
Al/Cu), rm
(Al/Cu), re
(Al/Cu), sm
(Al/Cu), se
mm2
mm2
mm2
mm2
1x 10-50
1x 10-50
1x 16-95
1x 16-95
Torque Nm 15
Technical specifications
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 67
Standards EN/IEC 60947-3
Size Size 1
LV
HR
C
3NJ6212-3
3NJ6212-4
3NJ6213-1
3NJ6214-1
3NJ6214-2
3NJ6213-3
3NJ6213-4
Type
BS 3NJ6272-3
3NJ6272-4
3NJ6274-1
3NJ6274-2
3NJ6273-3
3NJ6273-4
Switching capacity H S H
Rated insulation voltage Ui V 1000
Rated impulse voltage Uimp V 8000
For LV HRC fuse links according to
IEC 60269
1
For BS fuse links according to BS 88
* = fuse links from Lawson Fuses
based on BS 88
B2
Rated operational current Ie for fuse
links according to IEC 60269 / BS 88
A
250
250
250
Rated operational voltage Ue
at 50 / 60 Hz rated frequency
for DC
V
-
230
-
440
690
690
Utilization category DC23B DC21B AC22B AC23B
Rated conditional short-circuit current
Short-circuit strength (rms value)
Short-circuit making capacity (rms
value)
kA
kA
60
60
100
55
100
66
Rated making capacity
cos φ = 0.65
cos φ = 0.45
cos φ = 0.35
A
A
A
-
-
-
-
-
-
750
-
-
-
-
2500
Rated breaking capacity
cos φ = 0.65
cos φ = 0.45
cos φ = 0.35
A
A
A
-
-
-
-
-
-
750
-
-
-
-
2000
Endurance
Operating cycles, total
Operating cycles, electrical (690 V,
cos φ = 0.65)
1600
200
Power loss (without fuse links) W 78
Permissible ambient temperature °C - 5 ... + 55
Permissible mounting positions Horizontal or vertical with bottom connection
Degree of protection (in operating
state)
IP41
Technical specifications
3NJ62
68 System Manual, 11/2009, 711 6114-02 DS 03
Standards EN/IEC 60947-3
Size Size 1
LV
HR
C
3NJ6212-3
3NJ6212-4
3NJ6213-1
3NJ6214-1
3NJ6214-2
3NJ6213-3
3NJ6213-4
Type
BS 3NJ6272-3
3NJ6272-4
3NJ6274-1
3NJ6274-2
3NJ6273-3
3NJ6273-4
Main circuit connection
Cable lug connection, conductor cross-
section
(Al/Cu, solid or stranded)
according to DIN 46235 (Cu) and
DIN 46239 (Al)
mm2
mm2
1x 25-240
2x 25-70
Screw size M12
Torque Nm 30
Cable clamp connection, conductor
cross-section
Al/Cu), rm
(Al/Cu), re
(Al/Cu), sm
(Al/Cu), se
mm2
mm2
mm2
mm2
1x 16-185
1x 16-150
1x 35-240
1x 35-300
Torque Nm 25
Technical specifications
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 69
Standards EN/IEC 60947-3
Size Size 2
LV
HR
C
3NJ6222-3
3NJ6222-4
3NJ6223-1
3NJ6224-1
3NJ6224-2
3NJ6223-3
3NJ6223-4
Type
BS 3NJ6282-3
3NJ6282-4
3NJ6283-3
3NJ6283-4
Switching capacity H S H
Rated insulation voltage Ui V 1000
Rated impulse voltage Uimp V 8000
For LV HRC fuse links according to
IEC 60269
2 and 1
For BS fuse links according to BS 88
* = fuse links from Lawson Fuses
based on BS 88
B4
Rated operational current Ie for fuse
links according to IEC 60269 / BS 88
A
400
400
400
Rated operational voltage Ue
at 50 / 60 Hz rated frequency
with DC
V
-
-
690
690
Utilization category 230 440 AC22B AC23B
Rated conditional short-circuit current
Short-circuit strength (rms value)
Short-circuit making capacity (rms
value)
kA
kA
60
60
100
55
100
66
Rated making capacity
cos φ = 0.65
cos φ = 0.45
cos φ = 0.35
A
A
A
-
-
-
1200
-
-
-
-
4000
Rated breaking capacity
cos φ = 0.65
cos φ = 0.45
cos φ = 0.35
A
A
A
-
-
-
1200
-
-
-
-
3200
Endurance
Operating cycles, total
Operating cycles, electrical (690 V,
cos φ = 0.65)
1000
200
Power loss (without fuse links) W 158
Permissible ambient temperature °C - 5 ... + 55
Permissible mounting positions Horizontal or vertical with bottom connection
Degree of protection (in operating
state)
IP41
Technical specifications
3NJ62
70 System Manual, 11/2009, 711 6114-02 DS 03
Standards EN/IEC 60947-3
Size Size 2
LV
HR
C
3NJ6222-3
3NJ6222-4
3NJ6223-1
3NJ6224-1
3NJ6224-2
3NJ6223-3
3NJ6223-4
Type
BS 3NJ6282-3
3NJ6282-4
3NJ6283-3
3NJ6283-4
Main circuit connection
Cable lug connection, conductor cross-
section
(Al/Cu, solid or stranded)
according to DIN 46235 (Cu) and
DIN 46239 (Al)
mm2
mm2
1x 25-300
2x 25-240
Screw size 2 x M12
Torque Nm 30
Cable clamp connection, conductor
cross-section
Al/Cu), rm
(Al/Cu), re
(Al/Cu), sm
(Al/Cu), se
mm2
mm2
mm2
mm2
2x 16-185
2x 16-150
2x 35-240
2x 35-300
Torque Nm 25
Technical specifications
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 71
Standards EN/IEC 60947-3
Size Size 3
LV
HR
C
3NJ6232-3
3NJ6232-4
3NJ6233-1
3NJ6234-1
3NJ6234-2
3NJ6233-3
3NJ6233-4
Type
BS 3NJ6292-3
3NJ6292-4
3NJ6293-3
3NJ6293-4
Switching capacity H S H
Rated insulation voltage Ui V 1000
Rated impulse voltage Uimp V 8000
For LV HRC fuse links according to
IEC 60269
3 and 2
For BS fuse links according to BS 88
* = fuse links from Lawson Fuses
based on BS 88
3T*
Rated operational current Ie for fuse
links according to IEC 60269 / BS 88
A
630
630
630
500
630
500
Rated operational voltage Ue
at 50 / 60 Hz rated frequency
V
230
440
500
690
500
690
Utilization category DC23B DC21B AC22B AC23B
Rated conditional short-circuit current
Short-circuit strength (rms value)
Short-circuit making capacity (rms
value)
kA
kA
60
60
100
55
100
66
Rated making capacity
cos φ = 0.65
cos φ = 0.45
cos φ = 0.35
A
A
A
-
-
-
-
-
-
1890
-
-
1500
-
-
-
-
6300
-
-
5000
Rated breaking capacity
cos φ = 0.65
cos φ = 0.45
cos φ = 0.35
A
A
A
-
-
-
-
-
-
1890
-
-
1500
-
-
-
-
5040
-
-
4000
Endurance
Operating cycles, total
Operating cycles, electrical (690 V,
cos φ = 0.65)
1000
200
Power loss (without fuse links) W 357
Permissible ambient temperature °C - 5 ... + 55
Permissible mounting positions Horizontal or vertical with bottom connection
Degree of protection (in operating
state)
IP41
Technical specifications
3NJ62
72 System Manual, 11/2009, 711 6114-02 DS 03
Standards EN/IEC 60947-3
Size Size 3
LV
HR
C
3NJ6232-3
3NJ6232-4
3NJ6233-1
3NJ6234-1
3NJ6234-2
3NJ6233-3
3NJ6233-4
Type
BS 3NJ6292-3
3NJ6292-4
3NJ6293-3
3NJ6293-4
Main circuit connection
Cable lug connection, conductor
cross-section
(Al/Cu, solid or stranded)
according to DIN 46235 (Cu) and
DIN 46239 (Al)
mm2
mm2
1x 25-300
2x 25-240
Screw size 2 x M12
Torque Nm 30
Cable clamp connection, conductor
cross-section
Al/Cu), rm
(Al/Cu), re
(Al/Cu), sm
(Al/Cu), se
mm2
mm2
mm2
mm2
2x 16-185
2x 16-150
2x 35-240
2x 35-300
Torque Nm 25
Technical specifications
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 73
Auxiliary switches according to IEC 60947-5-1
Rated insulation voltage Ui V 690
Rated impulse voltage Uimp V 8000
Rated operational current Ie
at AC 15, Ue = 120 V
at AC 15, Ue = 230 V
at AC 15, Ue = 400 V
at AC 15, Ue = 690 V
A
A
A
A
8
6
4
2
Electronic fuse monitoring device (EFM 10)
Apparent power consumption VA S approx. 2.5 s
Internal resistance of the measurement
circuit
MOhm Rin > 6
Bearing temperature °C - 20 ... + 80
Operating temperature °C - 5 ... + 55
Operating temperature (from 500 V or 500 A) °C - 5 ... + 35
Degree of protection in closed disconnector IP40
Rated operational voltage of the main
switching devices
230 ... 690 V AC, 50 / 60 Hz
Voltage limits % ±15
Signaling relay in accordance with IEC
60947-5-1
A
kV
V
Ith = 1.5
Uimp = 4
Ui = 250
Loadability of the signaling relay
Ue
DC - 13; Ie
AC - 15; Ie
V
A
A
24
1
1,5
125
0,2
1,5
240
0,1
1,5
Short-circuit protection max. fuse Diazed 2 A gLgG
Technical specifications
3NJ62
74 System Manual, 11/2009, 711 6114-02 DS 03
Electronic fuse monitoring device AC version (EFM 20)
Apparent power consumption VA S approx. 2.5 s
Internal resistance of the measurement
circuit
MOhm Rin > 6
Bearing temperature °C - 20 ... + 80
Operating temperature °C - 5 ... + 55
Operating temperature (from 500 V or 500 A) °C - 5 ... + 35
Degree of protection in closed disconnector IP40
Rated operational voltage of the main
switching devices
230 ... 690 V AC, 50 / 60 Hz
Voltage limits % ±15
Undervoltage V 375
Overvoltage V 425
Voltage drop for faulty fuses V > 13
Delay time s 0,1
Relay 2 as relay 1 (fuse monitoring)
Memory function off
Open-circuit / closed-circuit Closed-circuit
Mode RUN mode
Menu option Show voltage values / alarms
Signaling relay in accordance with IEC
60947-5-1
A
kV
V
Ith = 1.5
Uimp = 4
Ui = 250
Signaling relay 1 1 changeover contact for fuse monitoring
only
Signaling relay 2 1 changeover contact as general alarm
output OR like signaling relay 1 (default
setting)
Loadability of the signaling relay
Ue
DC - 13; Ie
AC - 15; Ie
V
A
A
24
1
1,5
125
0,2
1,5
240
0,1
1,5
Short-circuit protection max. fuse Diazed 2 A gLgG
Technical specifications
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 75
Electronic fuse monitoring device DC version (EFM 25)
Apparent power consumption VA S approx. 2.5 s
Internal resistance of the measurement
circuit
MOhm Rin > 6
Bearing temperature °C - 20 ... + 80
Operating temperature °C - 5 ... + 55
Operating temperature (from 500 V or 500 A) °C - 5 ... + 35
Degree of protection in closed disconnector IP40
Rated operational voltage of the main
switching devices
220 ... 440 V DC
Voltage limits % ±15
Undervoltage V 200
Overvoltage V 240
Voltage drop for faulty fuses V > 20
Delay time s 0,1
Relay 2 as relay 1 (fuse monitoring)
Memory function off
Open-circuit / closed-circuit Closed-circuit
Mode RUN mode
Menu option Show voltage values / alarms
Signaling relay in accordance with IEC
60947-5-1
A
kV
V
Ith = 1.5
Uimp = 4
Ui = 250
Signaling relay 1 1 changeover contact for fuse monitoring
only
Signaling relay 2 1 changeover contact as general alarm
output OR like signaling relay 1 (default
setting)
Loadability of the signaling relay
Ue
DC - 13; Ie
AC - 15; Ie
V
A
A
24
1
1,5
125
0,2
1,5
240
0,1
1,5
Short-circuit protection max. fuse Diazed 2 A gLgG
Technical specifications
3NJ62
76 System Manual, 11/2009, 711 6114-02 DS 03
Ammeters
Input x /1 A or x /5 A
Overload
Moving-iron measuring instrument
Bi-metal measuring instrument
1.2 times
2 times
Min/max pointer
Moving-iron measuring instrument
Bi-metal measuring instrument
min
min
-
15
Intrinsic consumption
Moving-iron measuring instrument
Bi-metal measuring instrument
VA
VA
0,6
1
Motorized operating mechanism
Size Size 00 Size 1 Size 2 / size 3
Supply voltage V DC 24 ± 2
Current consumption A 1,1 1,3 2,8
Endurance(without any constraints on the
switch disconnectors according to IEC 60947-
3)
Operating cycles, total
Operating cycles under load
1600
200
1600
200
1000
200
Signal duration s Min. 0.5 or permanent signal
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 77
Dimensional drawings 7
7.1 2-/3-pole switch disconnectors








 


16(B
Figure 7-1 3NJ62 switch disconnectors, manually operated
259
590
49
Figure 7-2 Size 00, with motorized operating mechanism

16(BE


16(B
Figure 7-3 Size 00
*XLGH
SLQ
3OXJLQ
FRQWDFW
16(B




16(BE
Figure 7-4 Size 1




16(BE
16(B


Figure 7-5 Sizes 2 and 3
Dimensional drawings
7.1 2-/3-pole switch disconnectors
3NJ62
78 System Manual, 11/2009, 711 6114-02 DS 03
Clearance between phases


  
/ /

Figure 7-6 Plug-in contacts 2-pole switch disconnectors


  
/ / /


16(B
Figure 7-7 Plug-in contacts 3-pole switch disconnectors
Dimensional drawings
7.2 4-pole switch disconnectors
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 79
7.2 4-pole switch disconnectors
259590
99
44,4
Figure 7-8 Size 00, with motorized operating mechanism

99
 
Figure 7-9 Size 00
44,4
149
 
Figure 7-10 Size 1
44,4 364
590
249
Figure 7-11 Sizes 2 and 3
Clearance between phases


 


 
/ 1 / /

Figure 7-12 Plug-in verification
Dimensional drawings
7.3 Position of the phases, terminal bolts, and current transformers
3NJ62
80 System Manual, 11/2009, 711 6114-02 DS 03
7.3 Position of the phases, terminal bolts, and current transformers
/
/
/
16(B
/ / /
/ / /
/
/
/
Figure 7-13 Size 00
/
/
/
16(B
/ / /
/ / /
/
/
/
Figure 7-14 Size 1
/ / /
/
/
/ /
/ / /
/
/
16(B
Figure 7-15 Size 2 / size 3
Dimensional drawings
7.4 Current transformers
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 81
7.4 Current transformers

16(B

º






Figure 7-16 Current transformers for 3NJ62 switch disconnectors, size 00 and size 1, with feed-
through opening ∅ 21 mm
30
NSE0_01965
24
º14
44
45
30
64.5
65
27
Figure 7-17 Current transformers for 3NJ62 switch disconnectors, size 00, with feed-through opening
∅ 14 mm
Dimensional drawings
7.4 Current transformers
3NJ62
82 System Manual, 11/2009, 711 6114-02 DS 03













º
16(B
Figure 7-18 Current transformers for 3NJ62 switch disconnectors, size 2 and size 3
Dimensional drawings
7.5 Ammeters
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 83
7.5 Ammeters






ป



16(B
Figure 7-19 Moving-iron measuring instrument



ป

16(B


Figure 7-20 Bi-metal measuring instrument
Dimensional drawings
7.5 Ammeters
3NJ62
84 System Manual, 11/2009, 711 6114-02 DS 03
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 85
Schematics 8
8.1 Switching examples
Switching examples
/
/
/
7 /
.



) ) )

16(B
$
Figure 8-1 Switching example with 1 current transformer wired to 1 ammeter, with 1 NO contact and
1 NC contact
Schematics
8.1 Switching examples
3NJ62
86 System Manual, 11/2009, 711 6114-02 DS 03
/
/
/
7 /
.



) ) )

16(B
Figure 8-2 Switching example with 1 current transformer wired to multi-function plug, with 1 NO
contact and 1 NC contact
/
/
/
7 /
.



) ) )
7 /
.
7 /
.

16(B
Figure 8-3 Switching example with 3 current transformers wired to multi-function plug, with 1 NO
contact and 1 NC contact
Schematics
8.1 Switching examples
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 87
/
/
/
7 /
.



) ) )

16(B
$
Figure 8-4 Switching example with 1 current transformer wired to 1 ammeter and multi-function
plug, with 1 NO contact and 1 NC contact
/
/
/
7 /
.



) ) )
7 /
.
7 /
.

16(B
$
Figure 8-5 Switching example with 3 current transformers wired to 1 ammeter and multi-function
plug, with 1 NO contact and 1 NC contact
Schematics
8.1 Switching examples
3NJ62
88 System Manual, 11/2009, 711 6114-02 DS 03
/
/
/
7 /
.
) ) )
$


5HOD\

 




$FWLYH
)DXOW/
)DXOW/
)DXOW/
Figure 8-6 Switching example 3NJ62 manually operated, with 1 current transformer wired to 1
ammeter, with 1 NO contact and 1 NC contact, with electronic fuse monitoring device
(EFM10)
Schematics
8.1 Switching examples
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 89
$FWLYH
)DXOW/
)DXOW/
)DXOW/
0
/
/
/
7 /
.
) ) )
7 /
.
7 /
.
$



5HOD\




,
2


,
2
9
'&9
Figure 8-7 Switching example 3NJ62 with motorized operating mechanism, with 3 current transformers wired to 1
ammeter and multi-function plug, with 1 NO contact and 1 NC contact, with electronic fuse monitoring device
(EFM10)
Schematics
8.1 Switching examples
3NJ62
90 System Manual, 11/2009, 711 6114-02 DS 03
/
/
/
7 /
.
) ) )
$




5HOD\5HOD\
'LVSOD\





 





Figure 8-8 Switching example 3NJ62 manually operated, with 1 current transformer wired to 1
ammeter, with 1 NO contact and 1 NC contact, with electronic fuse monitoring device
(EFM20)
Schematics
8.1 Switching examples
3NJ62
System Manual, 11/2009, 711 6114-02 DS 03 91
0
/
/
/
7 /
.
) ) )
7 /
.
7 /
.
$




5HOD\ 5HOD\
'LVSOD\








,
2


,
2
9
'&9
Figure 8-9 Switching example 3NJ62 with motorized operating mechanism, with 3 current transformers wired to 1
ammeter and multi-function plug, with 1 NO contact and 1 NC contact, with electronic fuse monitoring device
(EFM20)
Schematics
8.2 Terminal connection diagram of the multi-function plugs
3NJ62
92 System Manual, 11/2009, 711 6114-02 DS 03
8.2 Terminal connection diagram of the multi-function plugs
8.2.1 Manually operated switch disconnectors
Table 8- 1 Manually operated switch disconnectors
Current transformer L1, k 1 11 Auxiliary switch, NC contact, 1
Current transformer L1, l 2 12 Auxiliary switch, NC contact, 2
Current transformer L2, k 3 13 Auxiliary switch, NO contact, 3
Current transformer L2, l 4 14 Auxiliary switch, NO contact, 4
Current transformer L3, k 5 15 EFM 10/20/25, relay 1, 11/21/31
Current transformer L3, l 6 16 EFM 10/20/25, relay 1, 14/24/34
7 17 EFM 10/20/25, relay 1, 12/22/32
8 18 EFM 20/25, relay 2, 41/51/61
19 EFM 20/25, relay 2, 44/54/64
20 EFM 20/25, relay 2, 42/52/62
8.2.2 Switch disconnectors with motorized operating mechanism
Table 8- 2 Switch disconnectors with motorized operating mechanism
Current transformer L1, k 1 11 Auxiliary switch, NC contact, 1
Current transformer L1, l 2 12 Auxiliary switch, NC contact, 2
Current transformer L2, k 3 13 Auxiliary switch, NO contact, 3
Current transformer L2, l 4 14 Auxiliary switch, NO contact, 4
Current transformer L3, k 5 15 "Open" section
Current transformer L3, l 6 16 "Close" section
Neutral 7 17 EFM 10/20/25, relay 1, 11/21/31
+ 24 V DC 8 18 EFM 10/20/25, relay 1, 12/22/32
19 EFM 20/25, relay 2, 41/51/61
20 EFM 20/25, relay 2, 42/52/62
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Order No.: 3ZX1012-0NJ62-1AC1
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