This product complies with requirements of IEC439 "Low-Voltage Complete Switchgear & Controlgear", JB/T9661 "Low-voltage Drawout Switchgear" and GB7251 "Low-voltage Complete Switchgear" etc. MNS type low-voltage drawout switch cabinet is applicable for industrial and mining enterprise, like power plant, substation, petrochemical industry and metallurgy, textile etc, residential district and tall building and so on, it is used for conversion, distribution and control of electric energy for distribution equipment of AC 50Hz power system with rated working voltage 660V or below.