Protect individual system parts against being damaged
DOLD offers you a very wide portfolio of relays for network monitoring. The devices monitor electrical variables such as voltage, phase outage/asymmetry, neutral conductor usage, frequency as well as insulation errors. Typical uses are device and system protections, the supply of safety lighting devices, et cetera.
Frequency Relay IK 9143

Product Overview
Advantages
- Easy setting
- Without auxiliary voltage
Features
- According to IEC/EN 60255-1
- Monitoring of overfrequency and underfrequency (selectable) in A.C. power systems
- Selection of frequency range for 50 or 60 Hz systems
- Adjustable response value
- Adjustable hysteresis
- De-energized on trip (output relay not activated in case of error)
- LED indicators for measuring voltage and contact position
- 1 changeover contact
- As option energized on trip (output relay activated in case of error)
- Devices available in 2 enclosure versions:
IK 9143: depth 58 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43 880
SK 9143: depth 98 mm, with terminals at the top for cabinets with mounting plate and cable duct - 17.5 mm width
Datasheet Download
Frequency Relay SK 9143

Product Overview
Advantages
- Easy setting
- Without auxiliary voltage
Features
- According to IEC/EN 60255-1
- Monitoring of overfrequency and underfrequency (selectable) in A.C. power systems
- Selection of frequency range for 50 or 60 Hz systems
- Adjustable response value
- Adjustable hysteresis
- De-energized on trip (output relay not activated in case of error)
- LED indicators for measuring voltage and contact position
- 1 changeover contact
- As option energized on trip (output relay activated in case of error)
- Devices available in 2 enclosure versions:
IK 9143: depth 58 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43 880
SK 9143: depth 98 mm, with terminals at the top for cabinets with mounting plate and cable duct - 17.5 mm width
Datasheet Download
Mains Frequency Monitor MK 9143N

Product Overview
Advantages
- Monitoring of 50 – and 60 Hz-current supply on over- and underfrequency
- For precise frequency measuring with fast response time
- High disturbance immunity
- Separately adjustable trip points and separate outputs for overand underfrequency (1 or 2 c/o each)
Features
- According to IEC / EN 60255-1
- Monitoring of local generator sets and voltage supplies
- MK 9143N / MH 9143:
– Trip points adjustable precisely and reproducible on 10 step rotational switch in the range of ± 0,1 Hz to ± 5 Hz related to 50 or 60 Hz
– Nominal frequency 50 or 60 Hz selectable
– Fixed hysteresis optimised for trip point
– Time delay for over and underfrequency each adjustable from 0 to 20 s
– As option one common output for under and overfrequency
– “Window”-mode (MK 9143N/400 / MH 9143/400) - MH 9143.38/008: With galvanic separated analogue output (current voltage) and 11 step LED chain for the actual frequency
- MK 9143N/600 / MH 9143/600:
– Variable alarm value in the range of 45 to 65 Hz
– Hysteresis adjustable for under- and overfrequency separately adjustable 0 … 20 %
– Common output for under and overfrequency “Window”-mode can be selected - Start up delay 0 … 30 s selectable
- Manual or auto reset selectable
- Output relay energized or de-energized on trip selectable for overfrequency
- Output relay de-energized on trip for underfrequency
- Universal frequency measuring input for AC 40 … 550 V
- Several options for auxiliary supply
- As option without aux. supply for voltage range AC 18 … 70 V or 70 … 275 V
- LED indicators for auxiliary supply, input frequency, over and under frequency alarm
- 2 possible contact arrangements
MK 9143N and MK 9143N/600: 2 x 1 C/O contacts, width 22,5 mm
MH 9143 and MH 9143/600: 2 x 2 C/O contacts, width 45 mm
Datasheet Download
Frequency Relay MK 9837N

Product Overview
Advantages
- Universal usage
- Easy handling
Features
- According to IEC/EN 60255-1
- Detection of over- or underfrequency of alternating voltage (adjustable function) (detection of over- and underfrequency see datasheet MK 9837N/5_0)
- Fast reaction time by measuring duration of cycle of input frequency
- Universal measuring input for AC-voltages of 15 … 280 V as well as 30 … 550 V
- As option with measuring input for inverters
- 4 ranges adjustable response value 1,5 … 200 Hz or 5 … 600 Hz
- Adjustable hysteresis
- Adjustable start up time delay 0 … 50 s at function underfrequency
- Adjustable monitoring time for missing input signal at function overfrequency
- Response delay programmable via terminals 0 … 100 s
- Alarm storing or auto-reset programmable via terminals
- Galvanic separation between measuring input, auxiliary voltage and output contacts
- MH 9837 available with wide input range for auxiliary supply (AC/DC 24 … 60 V or AC/DC 110 … 230 V)
- 2 changeover contacts, closed circuit operation
- Open circuit operation on request
- LED indication for auxiliary voltage, measuring voltage and alarm status
- MH 9837.12/008: With galvanic separated analogue output (current/voltage) and 11 step LED chain for the actual frequency
- Device available with 2 response values and seperately controlled outputrelays for under- and overfrequency see MK 9837N/500
- 2 possible compact designs:
MK 9837N: Width 22,5 mm
MH 9837: Width 45 mm
Datasheet Download
Frequency Relay MK 9837N/5_0

Product Overview
Advantages
- Separate output signals for under and over frequency
- Simple wiring
- Easy handling
Features
- According to IEC/EN 60255-1
- Monitoring of AC voltage for under and overfrequency, can be used also for pre-warning (monitoring of AC voltage for under or overfrequency see datasheet MK 9837N)
- Separate relay outputs for over- or underfrequency (1 or 2 changeover contacts each)
- Alternative usage for monitoring of a frequency window
- Separate adjustment of response value for over- or underfrequency at 4 ranges each, 1.5 … 200 Hz or 5 … 600 Hz
- Second response value for prewarning possible
- Fast reaction time by measuring duration of cycle of input frequency
- Universal measuring input for AC-voltages of 15 … 280 V as well as 30 … 550 V
- As option with measuring input for inverters
- Programmable hysteresis of response value: 2 … 10 %
- Start up time delay programmable via terminals from 0 … 50 s e.g. continuously
- Manual or auto-reset programmable via terminals
- Galvanic separation between measuring input, auxiliary voltage and output contacts
- MH 9837/508: With galvanic separated analogue output (current/voltage) and 11 step LED chain for the actual frequency
- MH 9837/5_0: With wide input range for auxiliary voltage available (AC/DC 24 … 60 V or AC/DC 110 … 230 V)
- Closed circuit operation (de-energized on trip)
- LED indication for auxiliary voltage, measuring voltage and alarm status
- Device available with 2 contacts
MK 9837N/5_0: 2 x 1 changeover contact
MH 9837/5_0: 2 x 2 changeover contacts or wide auxiliary voltage range - 2 possible compact designs:
MK 9837N/5_0: Width 22,5 mm
MH 9837/5_0: Width 45 mm
Datasheet Download
Frequency Relay IL 9837

Product Overview
Features
- According to IEC/EN 60255-1
- Overfrequency or underfrequency monitoring of AC voltages
- Adjustable response value fmin. or fmax 5 … 200 Hz or 15 … 600 Hz
- Adjustable hysteresis
- Large voltage range of the measuring input (nominal voltage AC 24 … 440 V)
- De-energized on trip
- LED indication for auxiliary voltage, measuring voltage and contact position
- 1 changeover contact
- As option for frequency inverters with a range of 1 … 300 Hz
- 2 changeover contacts available on request
- As option adjustable start-up delay available
- Energized on trip function available on request
- Devices available in 2 enclosure versions:
IL 9837: depth 58 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43880
SL 9837: depth 98 mm, with terminals at the top for cabinets with mounting plate and cable duct - 35 mm width
Datasheet Download
Frequency Relay SL 9837

Product Overview
Features
- According to IEC/EN 60255-1
- Overfrequency or underfrequency monitoring of AC voltages
- Adjustable response value fmin. or fmax 5 … 200 Hz or 15 … 600 Hz
- Adjustable hysteresis
- Large voltage range of the measuring input (nominal voltage AC 24 … 440 V)
- De-energized on trip
- LED indication for auxiliary voltage, measuring voltage and contact position
- 1 changeover contact
- As option for frequency inverters with a range of 1 … 300 Hz
- 2 changeover contacts available on request
- As option adjustable start-up delay available
- Energized on trip function available on request
- Devices available in 2 enclosure versions:
IL 9837: depth 58 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43880
SL 9837: depth 98 mm, with terminals at the top for cabinets with mounting plate and cable duct - 35 mm width
Datasheet Download
Frequency Relay BA 9837

Product Overview
Features
- According IEC/EN 60255-1
- Detection of under- or overfrequency
- Adjustable response value
- Optionally 1 or 2 changeover contacts
- Width 45 mm
Datasheet Download
Mains Frequency Monitor MH 9143

Product Overview
Advantages
- Monitoring of 50 – and 60 Hz-current supply on over- and underfrequency
- For precise frequency measuring with fast response time
- High disturbance immunity
- Separately adjustable trip points and separate outputs for overand underfrequency (1 or 2 c/o each)
Features
- According to IEC / EN 60255-1
- Monitoring of local generator sets and voltage supplies
- MK 9143N / MH 9143:
– Trip points adjustable precisely and reproducible on 10 step rotational switch in the range of ± 0,1 Hz to ± 5 Hz related to 50 or 60 Hz
– Nominal frequency 50 or 60 Hz selectable
– Fixed hysteresis optimised for trip point
– Time delay for over and underfrequency each adjustable from 0 to 20 s
– As option one common output for under and overfrequency
– “Window”-mode (MK 9143N/400 / MH 9143/400) - MH 9143.38/008: With galvanic separated analogue output (current voltage) and 11 step LED chain for the actual frequency
- MK 9143N/600 / MH 9143/600:
– Variable alarm value in the range of 45 to 65 Hz
– Hysteresis adjustable for under- and overfrequency separately adjustable 0 … 20 %
– Common output for under and overfrequency “Window”-mode can be selected - Start up delay 0 … 30 s selectable
- Manual or auto reset selectable
- Output relay energized or de-energized on trip selectable for overfrequency
- Output relay de-energized on trip for underfrequency
- Universal frequency measuring input for AC 40 … 550 V
- Several options for auxiliary supply
- As option without aux. supply for voltage range AC 18 … 70 V or 70 … 275 V
- LED indicators for auxiliary supply, input frequency, over and under frequency alarm
- 2 possible contact arrangements
MK 9143N and MK 9143N/600: 2 x 1 C/O contacts, width 22,5 mm
MH 9143 and MH 9143/600: 2 x 2 C/O contacts, width 45 mm
Datasheet Download
Frequency Relay MH 9837

Product Overview
Advantages
- Universal usage
- Easy handling
Features
- According to IEC/EN 60255-1
- Detection of over- or underfrequency of alternating voltage (adjustable function) (detection of over- and underfrequency see datasheet MK 9837N/5_0)
- Fast reaction time by measuring duration of cycle of input frequency
- Universal measuring input for AC-voltages of 15 … 280 V as well as 30 … 550 V
- As option with measuring input for inverters
- 4 ranges adjustable response value 1,5 … 200 Hz or 5 … 600 Hz
- Adjustable hysteresis
- Adjustable start up time delay 0 … 50 s at function underfrequency
- Adjustable monitoring time for missing input signal at function overfrequency
- Response delay programmable via terminals 0 … 100 s
- Alarm storing or auto-reset programmable via terminals
- Galvanic separation between measuring input, auxiliary voltage and output contacts
- MH 9837 available with wide input range for auxiliary supply (AC/DC 24 … 60 V or AC/DC 110 … 230 V)
- 2 changeover contacts, closed circuit operation
- Open circuit operation on request
- LED indication for auxiliary voltage, measuring voltage and alarm status
- MH 9837.12/008: With galvanic separated analogue output (current/voltage) and 11 step LED chain for the actual frequency
- Device available with 2 response values and seperately controlled outputrelays for under- and overfrequency see MK 9837N/500
- 2 possible compact designs:
MK 9837N: Width 22,5 mm
MH 9837: Width 45 mm
Datasheet Download
Frequency Relay MH 9837/5_0

Product Overview
Advantages
- Separate output signals for under and over frequency
- Simple wiring
- Easy handling
Features
- According to IEC/EN 60255-1
- Monitoring of AC voltage for under and overfrequency, can be used also for pre-warning (monitoring of AC voltage for under or overfrequency see datasheet MK 9837N)
- Separate relay outputs for over- or underfrequency (1 or 2 changeover contacts each)
- Alternative usage for monitoring of a frequency window
- Separate adjustment of response value for over- or underfrequency at 4 ranges each, 1.5 … 200 Hz or 5 … 600 Hz
- Second response value for prewarning possible
- Fast reaction time by measuring duration of cycle of input frequency
- Universal measuring input for AC-voltages of 15 … 280 V as well as 30 … 550 V
- As option with measuring input for inverters
- Programmable hysteresis of response value: 2 … 10 %
- Start up time delay programmable via terminals from 0 … 50 s e.g. continuously
- Manual or auto-reset programmable via terminals
- Galvanic separation between measuring input, auxiliary voltage and output contacts
- MH 9837/508: With galvanic separated analogue output (current/voltage) and 11 step LED chain for the actual frequency
- MH 9837/5_0: With wide input range for auxiliary voltage available (AC/DC 24 … 60 V or AC/DC 110 … 230 V)
- Closed circuit operation (de-energized on trip)
- LED indication for auxiliary voltage, measuring voltage and alarm status
- Device available with 2 contacts
MK 9837N/5_0: 2 x 1 changeover contact
MH 9837/5_0: 2 x 2 changeover contacts or wide auxiliary voltage range - 2 possible compact designs:
MK 9837N/5_0: Width 22,5 mm
MH 9837/5_0: Width 45 mm
Datasheet Download
Phase indicator IK 9168

Product Overview
Features
- According to IEC/EN 60 255, DIN VDE 0435-303
- Indication of phase failure in 3-phase systems
- Single phase connection possible
- Independent of phase sequence
- LED indicator for each phase
- Devices available in 2 enclosure versions:
IK 9168: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution systems according to DIN 43 880
SK 9168: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct - Width 17.5 mm
Datasheet Download
Phase monitor IK 9169

Product Overview
Features
- According to IEC/EN 60255-1
- Detection of phase failure in 3-phase systems
- Single phase connection possible
- Closed circuit operation
- Independent of phase sequence
- LED indicator for each phase
- Output 1 changeover contact
- Devices available in 2 enclosure versions:
– I- and R-versions, e.g. IK 9169 with depth 61 mm or RK 9169 with depth 71 mm with terminls at the bottom for installation systems and industrial distribution systems according to DIN 43880
– S-version, e.g. SK 9169: depth 100 mm, with terminals at the top for cabinets with mounting plate and cable duct - Width 17.5 mm
Datasheet Download
Phase Sequence Indicator IK 9178

Product Overview
Features
- According to IEC/EN 60 255-1
- Indication of phase sequence in 3-phase systems
- Without auxiliary supply
- LED indicator for phase sequence
- Devices available in 2 enclosure versions:
IK 9178: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SK 9178: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct - Width 17.5 mm
Datasheet Download
Phase Sequence Monitor (Phase Sequence Relay) IK 9179

Product Overview
Advantages
- According to IEC/EN 60255-1
- Detection of phase sequence in 3-phase systems
- Without auxiliary voltage
Features
- Closed circuit operation
- LED indicator for phase sequence
- Output 1 changeover contact
- Devices available in 3 enclosure versions:
– I- and R-model, e.g. IK 9169 with depth 61 mm or RK 9169 with depth 71 mm with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43880
– S-model, e.g. SK 9169 depth 100 mm, with terminals at the top for cabinets with mounting plate and cable duct - Width 17.5 mm
Datasheet Download
Phase monitor RK 9169

Product Overview
Features
- According to IEC/EN 60255-1
- Detection of phase failure in 3-phase systems
- Single phase connection possible
- Closed circuit operation
- Independent of phase sequence
- LED indicator for each phase
- Output 1 changeover contact
- Devices available in 2 enclosure versions:
– I- and R-versions, e.g. IK 9169 with depth 61 mm or RK 9169 with depth 71 mm with terminls at the bottom for installation systems and industrial distribution systems according to DIN 43880
– S-version, e.g. SK 9169: depth 100 mm, with terminals at the top for cabinets with mounting plate and cable duct - Width 17.5 mm
Datasheet Download
Phase Sequence Monitor (Phase Sequence Relay) RK 9179

Product Overview
Advantages
- According to IEC/EN 60255-1
- Detection of phase sequence in 3-phase systems
- Without auxiliary voltage
Features
- Closed circuit operation
- LED indicator for phase sequence
- Output 1 changeover contact
- Devices available in 3 enclosure versions:
– I- and R-model, e.g. IK 9169 with depth 61 mm or RK 9169 with depth 71 mm with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43880
– S-model, e.g. SK 9169 depth 100 mm, with terminals at the top for cabinets with mounting plate and cable duct - Width 17.5 mm
Datasheet Download
Phase monitor RK 9872

Product Overview
Advantages
- Reliability monitoring of 3- or 1-phase voltage systems on:
– Undervoltage
– Overvoltage
– Phase sequence (at 3-phase voltage system) - Fast fault location
- Preventive maintenance
- Space saving
Features
- According to IEC/EN 60255-1
- Detection of under-/overvoltage and phase sequence in 3-phase voltage systems
- Without separate auxiliary voltage
- LED-Indication for operation voltage and contact position
- De-energized on trip
- With fixed response value for undervoltage
- With fixed response value for overvoltage
- Width: 17,5 mm
Datasheet Download
Phase indicator SK 9168

Product Overview
Features
- According to IEC/EN 60 255, DIN VDE 0435-303
- Indication of phase failure in 3-phase systems
- Single phase connection possible
- Independent of phase sequence
- LED indicator for each phase
- Devices available in 2 enclosure versions:
IK 9168: depth 59 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43 880
SK 9168: depth 98 mm, with terminals at the top for cabinets with mounting plate and cable duct - Width 17.5 mm
Datasheet Download
Phase monitor SK 9169

Product Overview
Features
- According to IEC/EN 60255-1
- Detection of phase failure in 3-phase systems
- Single phase connection possible
- Closed circuit operation
- Independent of phase sequence
- LED indicator for each phase
- Output 1 changeover contact
- Devices available in 2 enclosure versions:
– I- and R-versions, e.g. IK 9169 with depth 61 mm or RK 9169 with depth 71 mm with terminls at the bottom for installation systems and industrial distribution systems according to DIN 43880
– S-version, e.g. SK 9169: depth 100 mm, with terminals at the top for cabinets with mounting plate and cable duct - Width 17.5 mm
Datasheet Download
Phase Sequence Indicator SK 9178

Product Overview
Features
- According to IEC/EN 60 255-1
- Indication of phase sequence in 3-phase systems
- Without auxiliary supply
- LED indicator for phase sequence
- Devices available in 2 enclosure versions:
IK 9178: depth 59 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43 880
SK 9178: depth 98 mm, with terminals at the top for cabinets with mounting plate and cable duct - Width 17.5 mm
Datasheet Download
Phase Sequence Monitor (Phase Sequence Relay) SK 9179

Product Overview
Advantages
- According to IEC/EN 60255-1
- Detection of phase sequence in 3-phase systems
- Without auxiliary voltage
Features
- Closed circuit operation
- LED indicator for phase sequence
- Output 1 changeover contact
- Devices available in 3 enclosure versions:
– I- and R-model, e.g. IK 9169 with depth 61 mm or RK 9169 with depth 71 mm with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43880
– S-model, e.g. SK 9169 depth 100 mm, with terminals at the top for cabinets with mounting plate and cable duct - Width 17.5 mm
Datasheet Download
Asymmetry Relay MK 9040N

Product Overview
Advantages
- Correct direction of rotation of drives
- Simple wiring
Features
- According to IEC/EN 60255-1
- Recognition of
– Voltage asymmetry
– Phase failure
– Voltage feedback
– Optionally with phase sequence recognition - Optionally with adjustable response delay
- 2 LED displays for power supply and state of contact
- Wire connection: Also 2 x 1.5 mm2 stranded ferruled, or 2 x 2.5 mm2 solid DIN 46228-1/-2/-3/-4
- As option with pluggable terminal blocks for easy exchange of devices
– With screw terminals
– Or with cage clamp terminals - Width 22.5 mm
Datasheet Download
Phase Sequence Relay MK 9056N

Product Overview
Advantages
- Correct sense of rotation of motors
- Simple wiring
- 2 Changeover contacts
Features
- According to IEC/EN 60255-1
- Detection of wrong phase sequence
- LED indication of rotation
- Wire connection: also 2 x 1.5 mm2 stranded ferruled, or 2 x 2.5 mm2 solid DIN 46228-1/-2/-3/-4
- As option with pluggable terminal blocks for easy exchange of devices
– With screw terminals
– Or with cage clamp terminals - Width 22.5 mm
Datasheet Download
Phase sequence relay MK 9059

Product Overview
Advantages
- Detection of wrong phase sequence
- Detection of phase failure (with N-connection)
Features
- According to IEC/EN 60255-1, DIN VDE 0435-303
- Suitable for voltage systems with:
– 3 AC 100 … 750 V
– 15 … 150 Hz - With auxiliary voltage
- With 1 changeover contact
- Width 22.5 mm
Datasheet Download
Trip circuit monitor UG 5124

Product Overview
Advantages
- Wide auxiliary voltage range DC 20 … 265 V
- Limiting of the power consumption at measuring circuit by a voltage independent constant current source
- On delay- / release delay each adjustable
Features
- According to IEC/EN 60 255-1
- Monitors continuously breaker trip circuits
- 2 changeover contacts
- Galvanic separated electronic
- De-energized on trip
- With pluggable terminal blocks for easy exchange of devices
- Terminal blocks coded
- Width 22,5 mm
Datasheet Download
Fuse monitor UG 9075

Product Overview
Advantages
- increasing the availability of plants by early detection of blown fuses, that may cause damage if undetected
- fast detection of blown fuses also with disconnected load availability of your plant on request
- reliable detection of blown fuses inspite of:
– Asymmetric mains
– Harmonic content
Features
- According to IEC/EN 60 255, DIN VDE 0435-303
- To monitor fuses in single and 3-phase AC voltage systems
- Undervoltage detection below 0.7 x UN
- No separate auxiliary necessary
- 2 changeover contacts
- 2 nominal voltages adjustable:
3/N AC 240 V / 140 V or 3/N AC400 V / 230 V or fixed nominal voltage: 3/N AC 110 V / 64 V - Adjustable operate delay
- Energized on trip
- Automatic adjustment to 50 Hz and 60 Hz mains frequency
- Width 22.5 mm
Datasheet Download
Phase Failure Relay, With Time Delay IL 5201/20006

Product Overview
Features
- According to IEC/EN 60255-1
- Monitoring of phase failure in 3-phase voltage systems
- 4 time ranges 0.25 … 640 min adjustable
- Auxiliary supply DC 48 V
- Independent of phase sequence
- Single phase connection possible
- De-energized on trip
- LED indicator for each phase and state of output contacts
- Output 1 changeover contact
- Width 35 mm
Datasheet Download
Phase Sequence Module IL 9059

Product Overview
Advantages
- Protects mobile equipment against damage or destruction coming from wrong phase sequence
- OA 9059: Reduced wiring by mounting directly in the motor connection box
Features
- According to IEC/EN 60255-1
- 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:
IL 9059: Depth 59 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43880
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
Datasheet Download
Neutral Monitor IL 9069

Product Overview
Features
- According to IEC/EN 60255-1
- 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 43880 - SL 9069: depth 98 mm with terminals at the top for cabinets with
mounting plate and cable duct - Width 35 mm
Datasheet Download
Fuse Monitor IL 9075

Product Overview
Advantages
- Increased system availability through early detection of fuse failures, which can cause considerable damage to systems
- Rapid detection of fuse failures, even when consumers are switched off, ensures system availability at the earliest possible point in time
- Reliable detection of fuse failure, even with an unbalanced or harmonic network and with regenerative motors
Features
- According to IEC/EN 60255-1
- 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
- Shorter response time than with motor circuit-breakers
- As option:
– Energized on trip (output relay activated in the event of a fault)
– De-energized on trip (output relay not activated in the event of a fault) with IP 9075 programmable via X4-X5 or X3-X4 - As option with manual reset function and remote reset, programmable via X1-X2
- 2 LED indicators
- 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 43880
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
Datasheet Download
Undervoltage Relay, 3-Phase With Test Key IL 9176

Product Overview
Advantages
- Preventive maintenance
- For better productivity
- Quicker fault locating
Features
- According to IEC/EN 60255-1
- Detection of
– Undervoltage 1 up to 3-phase, 0.85 x UN
– Phase failure - Without auxiliary voltage
- De-energized on trip
- LED indicator for L1, L2, L3 with test key to simulate failure
- 2 changeover contacts
- Width 35 mm
Datasheet Download
Fuse Monitor RL 9075

Product Overview
Advantages
- Increasing the availability of plants by early detection of blown fuses, that may cause damage if undetected
- Fast detection of blown fuses also with disconnected load availability of your plant on request
- Reliable detection of blown fuses inspite of:
– asymmetric mains
– harmonic content
Features
- According to IEC/EN 60255-1
- To monitor fuses in single and 3-phase AC voltage systems with neutral
- Adjustable operating voltages: 400 V / 230 V and 230 V / 130 V and 110 V / 64V
- Undervoltage detection below 0.8 x UB
- Fast detection of a blown fuse
- No separate auxiliary necessary
- Output: 1 changeover contact
- De-energized on trip
- Adjustable switching delay
- Width:
– RL 9075: 35 mm
– RN 9075: 52.5 mm
Datasheet Download
Phase-sequence relay SL 9059

Product Overview
Advantages
- Protects mobile equipment against damage or destruction coming from wrong phase sequence
- OA 9059: Reduced wiring by mounting directly in the motor connection box
Features
- According to IEC/EN 60255-1
- 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:
IL 9059: Depth 59 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43880
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
Datasheet Download
Neutral Monitor SL 9069

Product Overview
Features
- According to IEC/EN 60255-1
- 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 43880
SL 9069: depth 98 mm with terminals at the top for cabinets with mounting plate and cable duct - Width 35 mm
Datasheet Download
Fuse Monitor SL 9075

Product Overview
Advantages
- Increased system availability through early detection of fuse failures, which can cause considerable damage to systems
- Rapid detection of fuse failures, even when consumers are switched off, ensures system availability at the earliest possible point in time
- Reliable detection of fuse failure, even with an unbalanced or harmonic network and with regenerative motors
Features
- According to IEC/EN 60255-1
- 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
- Shorter response time than with motor circuit-breakers
- As option:
– Energized on trip (output relay activated in the event of a fault)
– De-energized on trip (output relay not activated in the event of a fault) with IP 9075 programmable via X4-X5 or X3-X4 - As option with manual reset function and remote reset, programmable via X1-X2
- 2 LED indicators
- 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 43880
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
Datasheet Download
Asymmetry Relay BA 9040

Product Overview
Features
- According to IEC/EN 60255-1
- Recognition of
– Voltage asymmetry
– Phase failure
– Voltage feedback
– Optionally with phase sequence recognition - Optionally with adjustable response delay
- 2 LED displays for power supply and state of contact
- Wire connection: Also 2 x 1.5 mm2 stranded ferruled, or 2 x 2.5 mm2 solid DIN 46228-1/-2/-3/-4
- Width: 45 mm
Datasheet Download
Phase-sequence relay BA 9041

Product Overview
Advantages
- Correct sense of rotation of motors
- Simple wiring
Features
- According to IEC/EN 60255-1
- Detection of wrong phase sequence
- With 2 changeover contacts
- Width: 45 mm
Datasheet Download
Phase monitor MH 9352/001

Product Overview
Advantages
- Space and cost saving due to 3 devices in one housing
- Easy fault diagnostics by 3 separate DEL
– Overvoltage
– Undervoltage
– Phase sequence and power failure - Differentiated error transfer to PLC possible, e.g. for logging of error type and time
- Large measuring range 3 AC 85 … 550 V by built-in power supply with wide voltage range
Features
- Acc. to IEC/EN 60255-1
- 3 phases mains monitoring on
– Overvoltage
– Undervoltage
– Phase sequence and voltage failure - 3 separate output relais with 1 changeover contact each
- Without N connection
- Closed circuit operation
- As option with different connection blocks
– With fixed screw terminals
– With plug-in screw terminals
– With plug-in cage-clamp terminals - Width: 45 mm
Datasheet Download
Phase Monitor MH 9352/003

Product Overview
Advantages
- Most effective adaption to the application by 2 separated time delay functions for response value and reset value
- Universal usage by selection of nominal voltage (4 steps)
- Always the right unit in stock
Features
- According to IEC/EN 60255-1
- 3-phase voltage measurement for 3-phase 4wire systems
- Adjustable voltage AC 380, 400, 415, 440 V
- Phase sequence detection
- Adjustable response value for undervoltage and adjustable hysteresis
- Adjustable delay for undervoltage detection
- Without auxiliary voltage
- Width: 45 mm
Datasheet Download
Fuse Monitor RN 9075

Product Overview
Advantages
- Increasing the availability of plants by early detection of blown fuses, that may cause damage if undetected
- Fast detection of blown fuses also with disconnected load availability of your plant on request
- Reliable detection of blown fuses inspite of:
– asymmetric mains
– harmonic content
Features
- According to IEC/EN 60255-1
- To monitor fuses in single and 3-phase AC voltage systems with neutral
- Adjustable operating voltages: 400 V / 230 V and 230 V / 130 V and 110 V / 64V
- Undervoltage detection below 0.8 x UB
- Fast detection of a blown fuse
- No separate auxiliary necessary
- Output: 1 changeover contact
- De-energized on trip
- Adjustable switching delay
- Width:
– RL 9075: 35 mm
– RN 9075: 52.5 mm
Datasheet Download
Phase Sequence Module OA 9059

Product Overview
Advantages
- Protects mobile equipment against damage or destruction coming from wrong phase sequence
- OA 9059: Reduced wiring by mounting directly in the motor connection box
Features
- According to IEC/EN 60255-1
- 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:
IL 9059: Depth 59 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43880
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 m
Datasheet Download
Fuse Monitor IP 9075

Product Overview
Advantages
- Increased system availability through early detection of fuse failures, which can cause considerable damage to systems
- Rapid detection of fuse failures, even when consumers are switched off, ensures system availability at the earliest possible point in time
- Reliable detection of fuse failure, even with an unbalanced or harmonic network and with regenerative motors
Features
- According to IEC/EN 60255-1
- 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
- Shorter response time than with motor circuit-breakers
- As option:
– Energized on trip (output relay activated in the event of a fault)
– De-energized on trip (output relay not activated in the event of a fault) with IP 9075 programmable via X4-X5 or X3-X4 - As option with manual reset function and remote reset, programmable via X1-X2
- 2 LED indicators
- 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 43880
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
Datasheet Download
Fuse Monitor SP 9075

Product Overview
Advantages
- Increased system availability through early detection of fuse failures, which can cause considerable damage to systems
- Rapid detection of fuse failures, even when consumers are switched off, ensures system availability at the earliest possible point in time
- Reliable detection of fuse failure, even with an unbalanced or harmonic network and with regenerative motors
Features
- According to IEC/EN 60255-1
- 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
- Shorter response time than with motor circuit-breakers
- As option:
– Energized on trip (output relay activated in the event of a fault)
– De-energized on trip (output relay not activated in the event of a fault) with IP 9075 programmable via X4-X5 or X3-X4 - As option with manual reset function and remote reset, programmable via X1-X2
- 2 LED indicators
- 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 43880
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
Datasheet Download
Asymmetry Relay AK 9840

Product Overview
Features
- According to IEC/EN 60255-1
- For nominal voltages from 3 AC 110 up to 690 V
- Detection of
– Voltage asymmetry
– Incorrect phase sequence
– Phase failure
– Undervoltage - Voltage feedback recognition
- Also suitable for harmonic industrial mains
- Closed circuit operation
- Contact position indication
- With adjustable delay
- 2 C/O contacts
- Width: 75 mm