Low voltage switchgear

MODUL-K-SYSTEM

Design verified / type-tested, earthquake-proof low voltage switchgear system from 630 to 6300 amperes

Characteristics

With the MODUL-K-SYSTEM we developed a specialised, technically advanced and economical system for low-voltage machinery, which can be selectively used as a power distribution board for the low voltage main distribution or as a motor control center (MCC). Its modular configuration enables various installation techniques, from permanent mounting to a totally modular drawer system. An ideal complete solution for industrial applications that ensures utmost system availability with the fewest components.
The KAUTZ system configurations 630 A to 6300 A, always designed to precise customer specifications, are suitable for universal use, as well as for the increased requirements in heavy industry and the energy sector.

View technical data as PDF

Technical data

 
Standards Type-tested low-voltage
switchgear and controlgear
assemblies		 DIN EN (IEC) 61439-2, 
DIN VDE 0660-600-1+2

Protection against
electric shock
DIN VDE 50274, 
DIN VDE 0660-514

Testing of behaviour in case of internal faults
(accidental arcs)
IEC 61641, 
DIN VDE 0660-500, sh. 2

Seismic safety
IEC 60068-2-6/-3-3 /- 2-59, 
TA34-PB-295/12-01
 
Air-gap and leakage paths Rated impulse withstand
voltage (Uimp)		 12 kV
Overvoltage category III
Pollution severity 3
 
Rated insulation voltage (Ui)  1000 V
 
Rated operational voltage (Ue) 690 V
 
Busbars E-CU-F30 Main busbars
1250 A to 3200 A
(at the top), 
Up to 6300 A (in the rear)
Surface Bare (optional insulation)
Rated peak withstand
current		 Ipk up to 265 kA, 0,1 sec
Rated short time current Icw up to 120 kA, 1 sec
 
Main electrical equipment ACB 630 A to 6300 A
MCCB
Up to 1600 A
(fixed / plug-in /
withdrawable)
NH fuse switch
disconnector		 Up to 630 A, mounting size 00 / 1 / 2 / 3
Motor relay Therm. / electron. /
bus controlled (PROFIBUS, PROFINET)
 
Motor starters
 Coordination Type 1 or 2
(IEC 60947-4-1) 		 According to typicals
 
Internal separation Form 2b to form 4b IEC 61439-1
 
Metal parts Frame Chrome steel (stainless)
Doors, side walls Powder-coated steel (standard colour RAL 7035, other colours on request)
Internal sheets Steel
 
Degree of protection IEC 60529 / DIN 40050 IP 31 (higher ratings
available if required)     
 
Operating conditions DIN EN 60947-1 / 61439-1 Min -5°C, Max +45°C, 35°C
24h average
 
Cubicle dimensions   Height 2000 / 2250 mm
  Width
450 / 600 / 800 / 
1000 / 1200 mm
  Depth 600 mm


All mentioned ratings above are nominal ratings and catalogue values. Derating has to be considered depending on specific built-in status and operating conditions (e.g. temperature, IP protection etc.)

Incoming/outgoing feeder cubicles

Incoming feeder cubicles


MCCB up to 1600 A
ACB up to 6300 A

  • Fixed-mounted, withdrawable type; 3 or 4-pole
  • With isolated meter niche
  • Seperate cable connection compartment
  • Access from front or bottom
  • Safe operation of circuit breakers with closed door
  • Voltage surge protection
  • Power metering stations (optionally with bus technology)


Outgoing feeder cubicles


MCCB up to 1600 A
ACB up to 6300 A

  • Fixed-mounted, withdrawable type; 3 or 4-pole
  • With isolated meter niche
  • Seperate cable connection compartment
  • Access from above or below
  • Safe operation of circuit breakers with closed door
  • Power metering stations (optionally with bus technology)


NH fuse switch disconnector

  • drill-free, fixed-mounted installation technology from 125 A to 630 A (mounting size 00 / 1 / 2 / 3)
  • With optional meter compartment for metering gear and small outlets
  • Cable feeder with or without metering devices and measuring instruments
  • Spacious cable connection compartment
  • Drill-free connecting system


Plug-in technology

  • From 125 A to 630 A (mounting size 00 / 1 / 2 / 3)
  • 3 or 4-pole
  • Isolated distribution busbar system
  • Incoming and outgoing air ventilator systems for cubicle loads up to 1800A
  • Simultaneous connection from top and bottom
  • Cable feeder with or without metering devices and measuring instruments


Fixed-mounted, modular technology

  • From 125 A to 400 A (630 A)
  • Internal separation up to form 4b
  • 3 or 4-pole
  • Isolated distribution busbar system
  • Field loads up to 2000 A
  • Side cable connection compartment 400 mm, optionally 600 mm
  • Simultaneous connection from top and bottom
  • Cable feeder with or without metering devices and measuring instruments
  • combination of fixed-mounted and plug-in technology
  • Individual combination of module plates
  • Circuit-breaker outlets
  • Motor feeders


Modular plug-in technology

  • Internal separation up to form 4b
  • 3 or 4-pole
  • Isolated distribution busbar system
  • Incoming and outgoing air ventilator systems for cubicle loads up to 1800A
  • Access from above and below possible at same time
  • Individual configuration of plug-in modules


For small loads

  • Cable feeder at top or bottom
  • Device compartment with metal sheets
  • individul configuration of device compartment

Additional details

  • Design verified and tested for resistance to internal faults for maximum system and personal safety
  • Our development and construction includes ongoing product improvement and modification in line with market developments
  • Standard dimensions to ensure that all models are expandable
  • Prefabricated installation spaces for all installed devices and expansion components
  • High quality and sound construction for industrial applications with few system modules for maximum system availability and in modern industrial design
  • With flexibility for customer-specified solutions
  • Several patented component solutions, including: Busbar system, multifunctional struts, bus connections, MCC contact switches
  • Persistent development of our drill-free connection and plug system, including the PE/PEN/N bus
  • Produced using CNC-controlled laser machines and press brakes
  • All cubicle frames made from chrome steel, stainless without surface coating
  • Internal partitioning as per Form 4b in circuit-breaker panels, in-line fuse switch disconnector panels and MCC (Motor Control Centre) cubicles
  • Circuit-breakers designed for parallel cable connection
  • Cable/bus connection from top or bottom possible
  • Optional busduct from transformer to switchgear system
  • Cable terminal boards with integrated cable tray and cover panels for cable feeding from above
  • Reactive power compensation systems with modular fixed assembly and automatic ventilator control for long service life
  • Multi-variable busbar system
  • Uniform busbar system, expandable on both sides in short switch off times (approx. 20 minutes), using new drill-free busbar connector
  • Easy installation of switching devices due to drill-free connectors
  • Easy installation of current transducers in the NH strip-type fuses
  • Dirt-resistant specially designed top panel
  • Integrated base for the switchgear system
  • Corner switch panel also possible as system solution


Earthquake and shock testing for low voltage systems

The low voltage switchgear MODUL-K-SYSTEM was tested for earthquakes up to 2.5 times the power of Fukushima. The shock treatment for all systems guarantees absolute safety even in case of major jolts. For perfect delivery worldwide, even under the harshest shipping conditions.