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HMNS LV Withdrawable switchgear
1.General Description:
HMNS Withdrawable Low-Voltage Switchgear Cubicle is assembled with modularized components as combination unit (hereinafter called the device). It is applied to AC 50-60Hz @ rated operating voltage of 660V or below for power receiving and distribution of low voltage distribution system and for power switching, distribution and control of power distribution and motor control center as well as capacitance compensation. The switchgear cabinet complies with GB7251.12-2013 and IEC439.
2.Working condition:
1.Ambient temperature;-5℃----+40℃
2.Altitude：≤2000m；(indoor use)
3.Relative humidity≤95%(when temperature is +20℃),Maybe there will be condensation influence because of temperature change,user must consider it.
4.Switchgear and vertical surface’s gradient is no more than 5%, and whole switchgear must be put parallel and level.
5.Service environment：should be avoided fire, explosion risk, serious pollution, chemical corrosion and violent vibration.User should discuss with supplier while they have special requirements.
3.Main technical data
Rated voltage of main circuit（V） | AC380（400）、（660） | |
Voltage of auxiliary circuit （V） | AC220、380（400）DC110、220 | |
Rated frequency(Hz) | 50（60） | |
Rated insulating voltage（V） | 400（66a） | |
Rated current（A） | Horizontal busbar | ≤4000 |
Vertical busar（MCC） | 1000 | |
Short-time withstand current（kA/1S） | 50、80 | |
Peak withstand current（kA/0.1S） | 105、176 | |
Power frequency testing voltage（V/1min） | Main circuit | 2500 |
Auxiliary circuit | 1760 | |
Busbar | Three-phase four-wire system | A、B、C、PEN |
Three-phase five-wire system | A、B、C、PEN、N | |
Level of protection | IP3O、IP4O | |
4.Overall and assembly drawing
Circuit breaker series 
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