Measuring relays for main monitoring DOLD

• According to IEC/EN 60 255-1
• 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

• According to IEC/EN 60 255-1
• 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

• According to IEC/EN 60 255
• 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

• 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

• According to IEC/EN 60 255, DIN VDE 0435-303
• 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

• 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

• 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

• 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

• According to IEC/EN 60 255, DIN VDE 0435-303
• 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

• According to IEC / EN 60 255, VDE 0435 Teil 303
• Monitoring of 50 - and 60 Hz-current supply on
over- and underfrequency
• Monitoring of local generator sets and voltage supplies
• 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)
• 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 … 550V
• Several options for auxiliary supply
• As option without aux. supply for voltage range AC 18 … 70 V or
70 … 275V
• 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