Model
product brand nameSENTRON
product designation3KF switch disconnector with fuses
design of the product3KF switch disconnector with fuses
product version3KF NH
design of the actuating elementwithout
design of handleWithout
direction of actuationfrom the front
type of the driving mechanism motor driveNo
number of poles3
size of disconnecting link00 and 000
size of switch disconnector2
size of fuse linkNH000, NH00
mechanical service life (operating cycles) typical12 000
at AC-23 A at 440 V8 000
at AC-23 A at 690 V5 000
at DC-23 A at 440 V1 000
with closed switch for combination switch + fuse at 500 V maximum150 600 A²·s
with closed switch for combination switch + fuse at 400 V maximum150 600 A²·s
with closed switch at 690 V for combination switch + gG fuse maximum89 640 A²·s
of the fuse at 500 V maximum permissible223 000 A²·s
of the gG fuse at 690 V maximum permissible360 000 A²·s
of the aM fuse at 690 V maximum permissible565 000 A²·s
position of the switch operating mechanismleft
fuse systemLV HRC fuse
overvoltage categoryIV
with degree of pollution 2 at DC rated value440 / 3
with degree of pollution 3 at DC rated value440 / 3
surge voltage resistance rated value12 kV
Supply voltage
operating voltage at AC rated value maximum690 V
Protection class
protection class IPIP00
with closed switch with cover or cable lug coverIP20
on the frontIP00
Dissipation
with conventional rated thermal current per pole4.2 W
with conventional rated thermal current per device12.6 W
with conventional rated thermal current without fuse per pole4.2 W
with conventional rated thermal current without fuse per device12.6 W
for rated value of the current at AC in hot operating state per pole4.2 W
of the fuse per fuse maximum11 W
Main circuit
operating power at AC-23 A at 500 V rated value75 kW
operational current rated value125 A
Auxiliary circuit
number of connected NC contacts for auxiliary contacts0
number of connected NO contacts for auxiliary contacts0
number of connected CO contacts for auxiliary contacts0
number of CO contacts for auxiliary contacts0
number of NC contacts for auxiliary contacts6
number of NO contacts for auxiliary contacts6
suitability for use main switchYes
suitability for use switch disconnectorYes
suitability for use EMERGENCY OFF switchYes
suitability for use maintenance/repair switchYes
product feature interlockNo
product function phase failure monitoringNo
voltage triggerNo
undervoltage releaseNo
undervoltage release with leading contactNo
product feature sealableYes
product extension auxiliary switchYes
product extension optional locking capabilityYes
product extension optional motor driveNo
product extension optional fuse monitoringYes
fuse monitoringNo
overvoltage protection monitoringNo
Short circuit
short-circuit current making capacity (Icm) for switch disconnector at 690 V AC/440 V DC without fuse link rated value minimum7.65 kA
at 500 V by gG fuse rated value100 kA
at 690 V by gG fuse rated value100 kA
Connections
arrangement of electrical connectors for main current circuitTop and bottom
minimum15 N·m
maximum22 N·m
type of connectable conductor cross-sections for aluminum conductor stranded with lug1x (2.5 ... 95 mm²), 2x (2.5 ... 50 mm²)
for copper busbar1x (15 x 3 mm²)
stranded with lug according to DIN 462341x (2.5 ... 95 mm²), 2x (2.5 ... 50 mm²)
stranded with lug according to DIN 462351x (25 ... 70 mm²), 2x (25 ... 50 mm²)
type of electrical connection for main current circuitflat connector
Mechanical Design
height150 mm
width190 mm
depth161.5 mm
fastening methodfloor mounting
4-hole front mountingNo
front mounting with central attachmentNo
rail mountingNo
mounting positionany
Net Weight2.874 kg
Environmental conditions
minimum-25 °C
maximum70 °C
minimum-50 °C
maximum80 °C