Wenzhou Guoyao Electric Complete Set Co., Ltd
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HMNS low-voltage withdrawable switchgear
HMNS low-voltage withdrawable switchgear
Product details


Purpose:The HMNS system is suitable for power plants, substations, petrochemicals, metallurgy and steel rolling, light industry and textiles, as well as residential areas, high-rise buildings and other places. It is used for the conversion, distribution and control of electrical energy for power distribution equipment in power systems with AC frequency of 50-60Hz and rated working voltage of AC 660V and below.

Structural features:
The cabinet frame structure of the device is composed of a C-shaped profile device. C-shaped profiles are made by bending steel plates with E=25mm as the modular installation hole, and all cabinet frames and inner partitions are galvanized and passivated.
2. The design of the device and the materials used can prevent the occurrence of fault arcs to the greatest extent possible. Once a fault arc occurs, it can be extinguished in a short period of time.
The plastic material selected for the device does not contain CFCs or halogens, and it has the characteristics of flame retardancy and self extinguishing.


Main technical parameters:Assembled switchgear (TTA) that has passed type testing according to IEC 439.1-1992 standards; GB7251.1-1997 Electrical Parameters Rated Insulation Voltage Ui AC 1000V, DC 1500V Rated Operating Voltage Ue AC 690V, DC 750V Rated Pulse Withstand Voltage Uimp8kv Overvoltage Level III Pollution Level 3 Rated Frequency to 60HZ Rated Main Bus Rated Current Ie to 5500A Rated Peak Withstand Current IPk to 250kA Rated Short Time Withstand Current Icw to 100kA Rated Branch Bus Rated Current Ie to 1200A


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