Name: Siemens 3KF43400MF51 Circuit breaker Fuse size = 1 400 A 690 V AC 1 pc(s)
Brand: Siemens
SKU: 2864051

Electrical switchgear with metal terminals and a central operating element, used for controlling electrical circuits.

'Electrical circuit diagram with three resistors connected in parallel. Six connections run from top to bottom: 1, 3, 5 at the top; 2, 4, 6 at the bottom.'

Technical drawing of an electronic component with dimension units in millimetres. Front and side view with detailed measurements.

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Product type

Circuit breaker

Fuse size

Number of pins

Nominal current - rounded value

400 A

Type

3KF circuit breakers with fuses

Datasheet (PDF)

EAN:

Part number:

Item no:

Unavailable

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Technical specifications

Design of electrical connection / for main circuit: Flat connection
Display design / for door clutch rotary actuator switch position indicator: ON-OFF TEST
Layout of electrical connection / for main circuit: Top and bottom
Number of NO contacts / for auxiliary contacts: 8
Number of NC /for auxiliary contacts: 8
Tightening torque / with screw connection / minimum: 30 Nm
Tightening torque / for screw connection / maximum: 44 Nm
Design of the device: Fixed installation
Frame size of the separation pad: 2 and 1
Design size of the circuit breaker: 4
Limited short-circuit current (IQ): 100000 A.
Mounting type: Floor mounting
Operating power / at AC-23 A / at 400 V: 220000 W
Operating power / at AC-23 A / at 690 V: 400 kW
Forward current / with switch closed / at 690 V / with combination switch + AM fuse / maximum permissible: 41140 A.
Forward current / with closed switch / at 690 V / with combination switch + gG fuse / maximum permissible: 41140 A.
Forward current / with switch closed / for combination switch + fuse / at 500 V / maximum permissible: 39400 A.
Forward current / the fuse / at 400 V / maximum permissible: 37100 A.
Forward current / the fuse / at 690 V / maximum permissible: 47000 A.
Suitability for use / main switch: Yes
Suitable for use / switch disconnectors: Yes
Suitable for use / EMERGENCY STOP switch: Yes
Suitable for use / safety switch: Yes
Suitable for use / Maintenance/Repair switch: Yes
All mounting positions permitted
Electrical life (switching cycles) / at AC-23 A / at 440 V: 3000
Electrical life (switching cycles) / at AC-23 A / at 690 V: 2000
Electrical life (switching operations) / at DC-23 A / at 440 V: 1000
Mechanical life (cycles) / typical: 8000
Insulation voltage (UI) 1000 V
Position / of actuator: Front
Position / manual drive: After the first pole
Product extension / auxiliary switch: Yes
Product extension / optional / lockable: Yes
Product extension / optional / fuse monitoring: Yes
Protection class IP: IP00
Protection class IP / with switch closed / with aperture or cable shoe cover: IP00
Surge voltage resistance: 12 kV
Ambient temperature / during operation / minimum: -25 °C.
Ambient temperature / during operation / maximum: 70 °C.
Power loss/maximum 243 W.
Pollution level 3
Type of connectable conductor cross-sections / for copper conductors / multi-wired / with cable lugs / according to DIN 46234: 1x (6 ... 240 mm²), 2x (6 ... 150 mm²) / 1x (AWG 3 ... Kcmil 400), 2x (AWG 3 ... 2/0)
Type of connectable conductor cross-sections / for copper conductors / multi-wired / with cable lugs / according to DIN 46235: 1x (16 ... 185 mm²), 2x (16 ... 150 mm²
Type of connectable conductor cross-sections / for Cu power rails: 1x (30 x 10 mm²)

Type: 3KF circuit breakers with fuses

Product type: Circuit breaker

Fuse size: 1

Number of pins: 3

RoHS-compliant: Yes

Dim: (W x H x D) 288.6 x 215 x 190.5 mm

Content: 1 pc(s)

Nominal current: 400 A

Nominal current - rounded value: 400 A

Nominal voltage: 690 V AC

Width: 288.6 mm

Height: 215 mm

Depth: 190.5 mm

UKCA: yes

Documents & Downloads

Datasheet

Datasheet 2864051 Siemens 3KF43400MF51 Circuit breaker Fuse size = 1 400 A 690 V AC 1 pc(s)

User & Safety Instructions

User & Safety Instructions 2864051 Siemens 3KF43400MF51 Circuit breaker Fuse size = 1 400 A 690 V AC 1 pc(s)

Description

Switch disconnectors with 3KF SITOR, 400A fuse, size: 4, 3-pole, for NH fuse sizes 1 and 2 for semiconductor protection, front-wheel drive, center, basic unit without handle, flat connection without fuses

This text is machine translated.