Main switchboard MSB

Main SwitchBoard (MSB) is the incoming component of low-voltage systems and this is the most important factor of the power distribution network. Hawee can design and tailor-made offer for full range of main switchboard from 630A to 6300A.

Scope of installation:
Main SwitchBoard is installed at the master electrical chamber of industrial and civil project such as factory, industrial workshop, business center, building, condominium, hospital, school, habor, airport… The Main SwitchBoard is arranged right after transformer and before Distribution Board.

Applications Distribution
Reactive power correction
Reference standards IEC 61439-1 & 2
IEC 60529
Certificates ASTA (up to 4000A)
Installation Indoor


Electrical Specifications
Rated insulation voltage (Ui) 1000 V AC
Voltage rating (Ue) 690 V AC
Rated frequency (F) 50/60 Hz
Rated impact withstand voltage (Uimp) 12 kV
Auxiliary circuit rated voltage 230 V AC max.
Surge category IV
Degree of pollution 3
Rated current (ln) 6300 A
Rated 1s short-term current (lcw) 30/50/85 kA
Rated peak current (Ipk) 63/105/187 kA
Earthing system TT-IT-TNS-TNC
Power incoming and outgoing limits Up to 6300 A
Motor control feeder limits Up to 250 kW 400 V


 Mechanical Specifications
Cable inlet Top/bottom
Access  Front/rear
Ingress protection (IP) 20/31/42
Form 1/2b/3b/4
Average weight 650 Kg
Surface finish Electro-static powder-coated 50μm
Framework Panel construction
Panel colour RAL7032 (pebble grey)
Dimensions (mm)
Height 2000/2100/2200
Width 600/700/800/900/1000/1200
Depth 600/800/1000/1200/1500


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