Measuring and monitoring relays DOLD

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

• According to IEC/EN 60 255, DIN VDE 0435-303
• Detection of wrong phase sequence
• 2 changeover contacts
• Wire connection: also 2 x 1.5 mm2 stranded ferruled, or
2 x 2.5 mm2 solid DIN 46 228-1/-2/-3/-4
• MK 9056N as option with pluggable terminal blocks for easy
exchange of devices
- with screw terminals
- or with cage clamp terminals
• Width 22.5 mm

• According to IEC 255, EN 60 255, VDE 0435 part 303
• Detection of wrong phase sequence
• 1 or 2 changeover contacts
• Width 45 mm

• According to IEC 255, EN 60 255, VDE 0435 part 303
• Detection of wrong phase sequence
• 1 or 2 changeover contacts
• Width 45 mm

• Multifunction measuring relay acc. to EN 60255-1
• Voltage monitoring (1- and 3-phase)
• Current monitoring
• Frequency monitoring
• Power factor cos phi
• Phase sequence, phase failure, asymmetry
• Effective-, reactive- and apparent power
• Start up delay, on delay
• Adjustable hysteresis 0.2 ... 50 % of response value
• Manual reset
• LCD for indication of the measuring values
• Relay output
MK 9300N: 1 changeover contact
MH 9300: 2 x 1 changeover contacts
• Relay function selectable (energized/de-energized on trip)
• As option with plugable terminal blocks for easy exchange
of devices
- with screw terminals
- or with cage clamp terminals
• MK 9300N: Width 22,5 mm

• Multifunction measuring relay acc. to EN 60255-1
• Voltage monitoring (1- and 3-phase)
• Current monitoring
• Frequency monitoring
• Power factor cos phi
• Phase sequence, phase failure, asymmetry
• Effective-, reactive- and apparent power
• Start up delay, on delay
• Adjustable hysteresis 0.2 ... 50 % of response value
• Manual reset
• LCD for indication of the measuring values
• Relay output
MK 9300N: 1 changeover contact
MH 9300: 2 x 1 changeover contacts
• Relay function selectable (energized/de-energized on trip)
• As option with plugable terminal blocks for easy exchange of devices
- with screw terminals
- or with cage clamp terminals
• MH 9300: Width 45 mm

• According to IEC/EN 60 255-1
• For monitoring of AC 3- and single-phase with 50 /60 Hz
• Detection of
-- Overvoltage
-- Undervoltage
-- Voltage range excess
-- Phase failure
-- Phase asymmetry
-- missing neutral e.g. broken neutral wire
-- and phase sequence in 3-phase systems
• With or without neutral
• No separate auxiliary necessary
• Output: 1 changeover contact
• De-energized on trip
• Adjustable hysteresis for reset
• Adjustable switching delay
• Fast fault detection
• Width:
-- RL 9877: 35 mm
-- RN 9877: 52.5 mm

• According to IEC/EN 60 255-1
• For monitoring of AC 3- and single-phase with 50 /60 Hz
• Detection of
-- Overvoltage
-- Undervoltage
-- Voltage range excess
-- Phase failure
-- Phase asymmetry
-- missing neutral e.g. broken neutral wire
-- and phase sequence in 3-phase systems
• With or without neutral
• No separate auxiliary necessary
• Output: 1 changeover contact
• De-energized on trip
• Adjustable hysteresis for reset
• Adjustable switching delay
• Fast fault detection
• Width:
-- RL 9877: 35 mm
-- RN 9877: 52.5 mm

• According to IEC/EN 60 255-1
• IP 9270, SP 9270CT: 3-phase
IK 9270, SK 9270, IL 9270, SL 9270CT: single phase
• Measuring ranges from 0.1 ... 100 A
• Settable response value
• Fixed hysteresis
• Settable time delay
• De-energized on trip
• As option energized on trip
• LED indicators
• With auxiliary voltage
• Auxiliary supply and measuring input galvanic separated
• Devices available in 2 enclosure versions:
-- I-model, e.g. IK _ _ _ _, depth 61 mm
with terminals at the bottom for installation systems and
industrial distribution systems according to DIN 43 880
-- S-model, e.g. SK _ _ _ _, depth 100 mm
with terminals at the top for cabinets with mounting plate
and cable duct
• Width IK 9270, SK 9270: 17.5 mm
IL 9270, SL 9270CT: 35 mm
IP 9270, SP 9270CT: 70 mm

• According to IEC/EN 60 255-1
• IP 9270, SP 9270CT: 3-phase
IK 9270, SK 9270, IL 9270, SL 9270CT: single phase
• Measuring ranges from 0.1 ... 100 A
• Settable response value
• Fixed hysteresis
• Settable time delay
• De-energized on trip
• As option energized on trip
• LED indicators
• With auxiliary voltage
• Auxiliary supply and measuring input galvanic separated
• Devices available in 2 enclosure versions:
-- I-model, e.g. IK _ _ _ _, depth 61 mm
with terminals at the bottom for installation systems and
industrial distribution systems according to DIN 43 880
-- S-model, e.g. SK _ _ _ _, depth 100 mm
with terminals at the top for cabinets with mounting plate
and cable duct
• Width IK 9270, SK 9270: 17.5 mm
IL 9270, SL 9270CT: 35 mm
IP 9270, SP 9270CT: 70 mm

• According to IEC/EN 60 255-1
• IP 9270, SP 9270CT: 3-phase
IK 9270, SK 9270, IL 9270, SL 9270CT: single phase
• Measuring ranges from 0.1 ... 100 A
• Settable response value
• Fixed hysteresis
• Settable time delay
• De-energized on trip
• As option energized on trip
• LED indicators
• With auxiliary voltage
• Auxiliary supply and measuring input galvanic separated
• Devices available in 2 enclosure versions:
-- I-model, e.g. IK _ _ _ _, depth 61 mm
with terminals at the bottom for installation systems and
industrial distribution systems according to DIN 43 880
-- S-model, e.g. SK _ _ _ _, depth 100 mm
with terminals at the top for cabinets with mounting plate
and cable duct
• Width IK 9270, SK 9270: 17.5 mm
IL 9270, SL 9270CT: 35 mm
IP 9270, SP 9270CT: 70 mm

• According to IEC/EN 60 25-1
• IP 9277, SP 9277, SP 9277CT: 3-phase
IL 9277, SL 9277, SL 9277CT: singele phase
• Detects over- and undercurrent
• Measuring ranges from 0.1 ... 15 A
• With built in current transformer for 0.5 ... 100 A
• IL 9277, SL 9277 with 4 programmable ranges
• Settable 0.1 ... 1 IN
• Separate setting for over- and undercurrent
• Fixed hysteresis approx. 4 %
• Settable time delay
• IP 9277, SP 9277 with separate settable time delay for
over- and undercurrent
• De-energized on trip
• LED indicators for over-, under- and normal current
• Auxiliary supply and measuring input galvanic separated
• IL 9277, SL 9277 with one output relay for over- and
undercurrent
• IP 9277, SP 9277 with separate output relays for over- and
undercurrent
• Optionally energized on trip
• Devices available in 2 enclosure versions:
-- I-model, e.g. IL _ _ _ _, depth 61 mm
with terminals at the bottom for installations systems
and industrial distribution systems according to DIN 43 880
-- S-model, e.g. SL _ _ _ _, depth 100 mm
with terminals at the top for cabinets with mounting plate
and cable duct
• DIN rail or screw mounting
• Width IL 9277, SL 9277, SL 9277CT: 35 mm
IP 9277, SP 9277, SP 9277CT: 70 mm

• According to IEC/EN 60 255, VDE 0435, DIN VDE 0660 part 302
(pr EN 60 947-8) and part 303
• Monitoring of phase failure
- Undervoltage 3-phase 3 or 4 wire
- Phase failure
- Phase sequence
- Loss of neutral
- Phase asymmetry
• Without auxiliary supply
• De-energized on trip
• LED indication
- Supply voltage
- Phase failure
• 1 or 2 changeover contacts
• Depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
• Width 35 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• IP 9278, SP 9278: 3-phase
• Measuring range IP 9278, SP 9278: up to 15 A
SP 9278CT: up to 100 A
• 2 changeover contacts
• Adjustable asymmetry
• Settable time delay
• Open circuit operation
• LED indicators
• With auxiliary voltage
• Auxiliary supply and measuring input galvanic separated
• As option with external remote reset
• Width 70 mm

• According to IEC/EN 60 25-1
• IP 9277, SP 9277, SP 9277CT: 3-phase
IL 9277, SL 9277, SL 9277CT: singele phase
• Detects over- and undercurrent
• Measuring ranges from 0.1 ... 15 A
• With built in current transformer for 0.5 ... 100 A
• IL 9277, SL 9277 with 4 programmable ranges
• Settable 0.1 ... 1 IN
• Separate setting for over- and undercurrent
• Fixed hysteresis approx. 4 %
• Settable time delay
• IP 9277, SP 9277 with separate settable time delay for
over- and undercurrent
• De-energized on trip
• LED indicators for over-, under- and normal current
• Auxiliary supply and measuring input galvanic separated
• IL 9277, SL 9277 with one output relay for over- and
undercurrent
• IP 9277, SP 9277 with separate output relays for over- and
undercurrent
• Optionally energized on trip
• Devices available in 2 enclosure versions:
-- I-model, e.g. IL _ _ _ _, depth 61 mm
with terminals at the bottom for installations systems
and industrial distribution systems according to DIN 43 880
-- S-model, e.g. SL _ _ _ _, depth 100 mm
with terminals at the top for cabinets with mounting plate
and cable duct
• DIN rail or screw mounting
• Width IL 9277, SL 9277, SL 9277CT: 35 mm
IP 9277, SP 9277, SP 9277CT: 70 mm

• According to IEC/EN 60 25-1
• IP 9277, SP 9277, SP 9277CT: 3-phase
IL 9277, SL 9277, SL 9277CT: singele phase
• Detects over- and undercurrent
• Measuring ranges from 0.1 ... 15 A
• With built in current transformer for 0.5 ... 100 A
• IL 9277, SL 9277 with 4 programmable ranges
• Settable 0.1 ... 1 IN
• Separate setting for over- and undercurrent
• Fixed hysteresis approx. 4 %
• Settable time delay
• IP 9277, SP 9277 with separate settable time delay for
over- and undercurrent
• De-energized on trip
• LED indicators for over-, under- and normal current
• Auxiliary supply and measuring input galvanic separated
• IL 9277, SL 9277 with one output relay for over- and
undercurrent
• IP 9277, SP 9277 with separate output relays for over- and
undercurrent
• Optionally energized on trip
• Devices available in 2 enclosure versions:
-- I-model, e.g. IL _ _ _ _, depth 61 mm
with terminals at the bottom for installations systems
and industrial distribution systems according to DIN 43 880
-- S-model, e.g. SL _ _ _ _, depth 100 mm
with terminals at the top for cabinets with mounting plate
and cable duct
• DIN rail or screw mounting
• Width IL 9277, SL 9277, SL 9277CT: 35 mm
IP 9277, SP 9277, SP 9277CT: 70 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• IP 9278, SP 9278: 3-phase
• Measuring range IP 9278, SP 9278: up to 15 A
SP 9278CT: up to 100 A
• 2 changeover contacts
• Adjustable asymmetry
• Settable time delay
• Open circuit operation
• LED indicators
• With auxiliary voltage
• Auxiliary supply and measuring input galvanic separated
• As option with external remote reset
• Width 70 mm

• According to IEC/EN 60 255, DIN VDE 0660 part 302
(pr EN 60 947-8) and part 303
• Monitoring of
- Undervoltage 3 phase
- Phase failure
- Phase sequence
- Loss of neutral
- Phase asymmetry
- Overtemperature
- Broken wire in thermistor circuit
- Short circuit in thermistor circuit
• Without auxiliary supply
• 1 sensing input for 1 ... 6 thermistors
• LED indication
- Supply voltage
- Measuring voltage
- Temperature
• As option with manual reset on temperature fault
• 2 x 1 changeover contact
• Depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• Width 35 mm

• According to IEC/EN 60 255-1
• IP 9270, SP 9270CT: 3-phase
IK 9270, SK 9270, IL 9270, SL 9270CT: single phase
• Measuring ranges from 0.1 ... 100 A
• Settable response value
• Fixed hysteresis
• Settable time delay
• De-energized on trip
• As option energized on trip
• LED indicators
• With auxiliary voltage
• Auxiliary supply and measuring input galvanic separated
• Devices available in 2 enclosure versions:
-- I-model, e.g. IK _ _ _ _, depth 61 mm
with terminals at the bottom for installation systems and
industrial distribution systems according to DIN 43 880
-- S-model, e.g. SK _ _ _ _, depth 100 mm
with terminals at the top for cabinets with mounting plate
and cable duct
• Width IK 9270, SK 9270: 17.5 mm
IL 9270, SL 9270CT: 35 mm
IP 9270, SP 9270CT: 70 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• IP 9278, SP 9278: 3-phase
• Measuring range IP 9278, SP 9278: up to 15 A
SP 9278CT: up to 100 A
• 2 changeover contacts
• Adjustable asymmetry
• Settable time delay
• Open circuit operation
• LED indicators
• With auxiliary voltage
• Auxiliary supply and measuring input galvanic separated
• As option with external remote reset
• Width 70 mm