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• According to IEC/EN 61 557-8
• For single and 3-phase AC-systems up to 0 ... 500 V and 10 ... 10000 Hz
• Adjustable tripping value RAL of 5 ... 100 kΩ
• Monitors also disconnected voltage systems
• De-energized on trip
• Auxiliary voltage Measuring Circuit and output contacts are galvanically separated
• Manual and auto reset
• With test and reset button
• Connections of external test and reset buttons possible
• LED indicators for operation and alarm
• 2 changeover contacts
• IL/SL 5880/200 with additional prewarning
- adjustable prewarning value 10 kΩ ... 5 MΩ
- output function programmable
• Variant IL/SL 5880/300 according to DIN VDE 0100-551 for mobile generator sets available
• 4 models available:
IL 5880, IP 5880: 61 mm deep with terminals near to the bottom to be mounted in consumer units
or industrial distribution systems according to DIN 43 880
SL 5880, SP 5880: 98 mm deep with terminals near to the top to be mounted in cabinets with
mounting plate and cable ducts
• DIN rail or screw mounting
• 35 mm width

• According to IEC/EN 61 557-8
• For DC voltage systems up to 12 ... 280 V
• Wide voltage range of measuring input UN DC 12 ... 280 V (on request DC 24 ... 500 V with separate auxiliary supply, Measuring range 20 ... 500 kΩ) • Adjustable tripping value RAL of
5 ... 200 kΩ
• Selective ground fault indication for L+ and L- allows fast fault finding
• Without auxiliary supply
• De-energized on trip
• 2 changeover contacts
• Automatic or manual reset, programmable
• With test and reset buttons
• Connection for external test and reset button possible
• galvanic separated AC or DC auxiliary supply available as option
• adjustable time delay as option
• 2 models available:
IL 5881: 61 mm deep with terminals near to the bottom to be mounted in consumer units or industrial distribution systems according to DIN 43 880
SL 5881: 98 mm deep with terminals near to the top to be mounted in cabinets with mounting plate and cable ducts
• 35 mm width

• According to IEC/EN 62 020
• for AC and pulsating DC currants Type A to IEC/TR 60755
• 9 tripping values from 10 mA to 10 A or from 10 mA ... 30 A
• Frequency range 20 ... 2000 Hz
• Selection of manual or automatic reset
• With prewarning
• With test and reset button
• Broken wire detection
• Short reaction time
• With adjustable delay tv
• De-energized on trip
• LED indication for auxiliary supply and state of contact
• 2 x 1 changeover contact
• With sealable cover
• Devices available in 3 enclosure versions:
IL 5882: 63 mm deep with terminals near to the bottom to be
mounted in consumer units or industrial distribution
systems according to DIN 43 880
- width 35 mm
- for connection of external residual current transformer,
e. g. DOLD ND 5016, ND5019

• According to DIN 19235
• Common alarm annunciator
• Expandable from 4 up to 160 inputs
• Open circuit inputs / closed circuit inputs  selectable via bridges X1-X2
• Delayed inputs up to 10 s
• Acknowledgement push button QH for external buzzer built in
• Accessories: Buzzer IK 8832, SK 8832
• Devices available in 2 enclosure versions:
I-model: depth 61 mm, with terminals at the bottom for installations systems and industrial distribution systems according to DIN 43 880
S-model: depth 100 mm, with terminals at the top for cabinets with mounting plate and cable duct
• Width 35 mm

Fault annunciator IL 5990, SL 5990:
• 4 inputs with LED on control unit
• 1 output for common signal and 1 output for audible alarm

• According to DIN 19235
• Common alarm annunciator
• Expandable from 4 up to 160 inputs
• Open circuit inputs / closed circuit inputs  selectable via bridges X1-X2
• Delayed inputs up to 10 s
• Acknowledgement push button QH for external buzzer built in
• Accessories: Buzzer IK 8832, SK 8832
• Devices available in 2 enclosure versions:
I-model: depth 61 mm, with terminals at the bottom for installations systems and industrial distribution systems according to DIN 43 880
S-model: depth 100 mm, with terminals at the top for cabinets with mounting plate and cable duct
• Width 35 mm

Extension unit IL 5991, SL 5991:
• 4 inputs with LED on control unit

• According to
- Performance Level (PL) c and category 2 to EN ISO 13849-1: 2008
- SIL Claimed Level (SIL CL) 2 to IEC/EN 62061
- Safety Integrity Level (SIL) 2 to IEC/EN 61508
- Category 2 to EN 954-1
• BA 7924.21/002 und BA 7924.21/003
- Performance Level (PL) d and category 3 to EN ISO 13849-1: 2008
- SIL Claimed Level (SIL CL) 2 nach IEC/EN 62061
- Safety Integrity Level (SIL) 2 to IEC/EN 61508
- Category 3 to EN 954-1
• Release delay
• Without auxiliary voltage
• Output: 1 NC, 1 NO contacts, forcibly guided
• Operating state display
• Optionally with adjustable or fixed time delay up to 30 s
• Optionally with redundant timing circuit
• Optionally with 1 or 2 separate timing circuits
• Optionally also in housing for distribution board
• Width 45 mm, 35 mm or 52.5 mm

• According to IEC/EN 61 810-1
• Optionally contacts with up to a maximum 4 changeover contacts
• High thermal current Ith
• Pushbutton for manual actuation of the contact
• Operating position display
• Optionally without manual actuation and an operating position display
• Optionally for 2-wire initiator activation
• Optionally for switching low loads
• Optionally for switching lamps with parallel compensation (e.g. HQ lamps)
• Optionally for switching large inductive direct current loads
• Optionally with a recovery diode (only DC devices)
• Optionally with reliable release voltage of AC 120 V
• IK 8701: width 17.5 mm
IL 8701: width 35 mm
IN 8701: width 52.5 mm

• According to IEC/EN 60 669
• Impulse operation
• Pushbutton for manual actuation of the contacts
• Operating position display
• Optionally contacts with up to a maximum of 4 changeover contacts
• Width 17.5 mm or 35 mm

• According to IEC/EN 60 669
• Impulse operation
• Pushbutton for manual actuation of the contact
• Operating position display
• Max. glow lamp load: 4 mA
• IK 8805: width 17.5 mm
IL 8805: width 35 mm

• According to IEC/EN 60 669
• Possible connection to different phases of:
A1, ZE / ZA, GE / GA
• Pushbutton for manual actuation of the contacts
• Operating position display
• Optionally with 1 or 2 NO contacts
• Max. glow lamp load 4 mA
• Width 55 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Measuring range 0.175 ... 1 A
• Fixed switching point setting
• High maximum load
• As option with semiconductor output
• Width
IK 8839: 17.5 mm
IL 8839: 35 mm

• Increases life of 1-phase squirrel motors and mechanical drives
• Devices available in 2 enclosure version:
IL 9017: depth 61 mm with terminals at the bottom for
installations systems and industrial distribution systems
according to DIN 43 880
SL 9017: depth 100 mm with terminals at the top for
cabinets with mounting plate and cable duct
• For single phase motors up to 1.5 kW
• Adjustable ramp time and starting torque
• Semiconductors will be bridged after start up
• LED indication
• Width 35 mm

• Increases life of 1-phase squirrel motors and mechanical drives
• For single phase motors up to 1.5 kW
• Adjustable ramp time/deceleration time and starting torque/
deceleration torque
• Semiconductors will be bridged after start up
• LED indication
• Width 35 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Detection of over- or underspeed or frequency, function
selectable
• 3 selectable ranges for frequency or speed, adjustable tripping
value
• Ranges up to 10 kHz ( 600.000 ipm) available,therefore suitable
for turbines, centrifuges and similar applications
• Adjustable hysteresis
• Input also suitable for SKF sensor bearings
• As option for Namur sensors
• As option for permanent magnet sensors
• As option with adjustable switching delay/start up delay
• On request with manual reset
• IK 9055 and SK 9055: compact version for DC 24 V auxiliary
supply
• IL 9055 and SL 9055: for auxiliary supply up to AC 400 V with
galvanic separation to sensor input
• De-energized on trip (Energized on trip on request)
• LED indicators for auxiliary supply, sensor pulses and contact
position
• 1 changeover contact (2 changeover on request)
• Devices available in 2 enclosure versions:
IK/IL 9055: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SK/SL 9055: depth 98 mm, with terminals at the top for
cabinets with mounting plate and cable duct
• IK 9055, SK 9055: width 17.5 mm
• IL 9055, SL 9055: width 35 mm

• According to DIN EN 60255
• Detection of incorrect phase sequence
• No separately auxiliary voltage necessary
• Nominal voltage range 3 AC 380 ... 690 V
• Suitable for operation with inverters (f = 40 ... 80 Hz)
• Relay output:
- IL/SL 9059: 1 changeover contact
- OA 9059: 1 NC contact
• Extended temperature range
• Devices available in 3 enclosure versions:
I L 9059: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution systems
according to DIN 43 880
SL 9059: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• OA 9059: sealed modul with stranded wire connection
suitable for mounting in terminal box
• Width
- IL/SL 9059: 35 mm
- OA 9059: 62 mm

• According to IEC/EN 60 255-1
• Detection of
-- missing neutral in the system
-- broken neutral on IL/SL 9069
-- neutral exchanged against phase
• Detection of phase failure also with disconnected load
• For 3-phase systems
• De-energized on trip
• LED indicator for operation/state of output contacts
• Single phase connection possible
• Without auxiliary voltage
• 2 cangeover contacts
• Optionally with adjustable asymmetry detection and on delay
• Devices available in 2 enclosure version:
IL 9069: depth 59 mm with terminals at the bottom for
installations systems and industrial distribution
systems according to DIN 43 880
SL 9069: depth 98 mm with terminals at the top for
cabinets with mounting plate and cable duct
• Width 35 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Identification of
- undervoltage
- phase failure
- asymmetry also with reverse voltage
- missing neutral in the system
- broken neutral on IL/SL 9071
- neutral exchanged against phase
• Single phase connection possible
• According to DIN VDE 0100-710
(for rooms used for medical purposes) as an option
• Fixed setting value (variable as an option)
• Closed circuit operation principle
• LED indicator
• With safe disconnection according to IEC/EN 61 140,
IEC/EN 60 947-1 between the Measuring Circuit and the contacts
• Independant of phase sequence
• 2 changeover contacts
• Devices available in 2 enclosure version:
IL 9071: depth 61 mm with terminals at the bottom for
installations systems and industrial distribution
systems according to DIN 43 880
SL 9071: depth 98 mm with terminals at the top for
cabinets with mounting plate and cable duct
• Width 35 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Recognizes fuse failures in three-phase mains up to 3 AC 690 V
• Can be used for all types and sizes of fuses
• Independent of phase sequence
• Signals even if loads are switched off
• No malfunction on
- asymmetrical mains
- mains with harmonic waves
- motors producing feedback
• Shorter response time than with motor circuit-breakers
• Green LED for intact fuses
• Red LED for fuse failure
• As option: open/closed circuit operation in the case
of IP 9075 programmable via X4-X5 or X3-X4
• As option: with manual reset function and remote reset,
programmable via X1-X2
• As option: 1 NO contact or 2 changeover contacts
• Devices available in 2 enclosure versions:
I-model: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
S-model: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• IL 9075, SL 9075: width 35 mm
IP 9075, SP 9075: width 70 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Identification of overvoltage, undervoltage and phase failure
• With asymmetry identification as an option
• Mains fault diagnostics with a number of LEDs
• Setting values for overvoltage and undervoltage can be set
separately
• Large Setting Ranges 0.9 ... 1.3 UN and 0.7 ... 1.1 UN
• Time delay variable between 0.1 ... 20 s
• Closed circuit operation
• No auxiliary voltage
• Independant of phase sequence
• As option with phase sequence detection
• Single-phase connection possible
• Optionally for 3P3W Systems
• 2 changeover contacts, at IP/SP 9077 2 x 2 changeover contacts
• Devices available in 2 enclosure versions:
I-model: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
S-model: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• IL 9077, SL 9077: width 35 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Fast detection of undervoltage or phase failure in three-phase
voltage systems
• Detects auto reclosing of 20 ms
• Adjustable response value 0.55 ... 1.05 UN
• Operate delay to generate a defined reset signal
• Manual reset possible with external circuit
• Single-phase connection possible
• Optionally fixed response value 0.8 UN
• Closed circuit operation principle
• Green LED indicate for closed contact
• Independant of phase sequence
• 3p4w connection
• Optionally for 3p3w systems
• 2 changeover contacts
• Devices available in 2 enclosure versions:
IL 9079: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SL 9079: depth 98 mm, with terminals at the top for cabinets
for mounting plate and cable duct
• Width 35 mm