MNS Low-Voltage Withdrawable Switchgear

Overview

The MNS LV withdrawable switchgear(hereinafter referred to as the device)is manufactured by standard module through consulting the MNS series low voltage switchgear of the Swiss ABB Company and synthetically improved.The device is  intended for use as a control device for various power generation,transmission,distribution,power transfer,and powerconsumption devices in systems with AC 50Hz and rated working voltages up to 660V.It is widely used in the low voltage  distribution systems of various mining enterprises,tall buildings and hotels,municipal constructions,etc.Apart from being used in land,it can also be used in marine drilling platforms and nuclear power stations after special treatment.

The device complies with international standard IEC439-1 and national standard GB7251.1.

Structural Features

The device’s basic framework is a combined assembly structure.Zinc-plated cabinet structural parts are connected and firmed into basic framework with self-tapping screws or 8.8 grade square corner screws.Furthermore,according to scheme change,corresponding  gate,closing  board,baffle  plate,installation  support,and  bus  bar,function  units  can  be  assembledtogether with basic framwork to a complete device.Modulus is adopted to interior component and compartment dimensions (modulus unite =25mm).

+Compact design:more function units are contained in less space.

+Structure has strong versatility and flexible assembly.C type bar section of 25mm modulus can meet the demands of various structures and types,protection level and operational environments.

+ Adopt standard module design,which can be combined into standard units such as protection,operation,transfer,control,regulation,measurement,indication,etc.The  user  can  choose  assembly  according  to  requirements  at  will.More than 200 components can be combined into various cabinet structures and drawer units.

+Good security:adopt high-strength flame-retardant type engineering plastic parts in large quantities to effectively enhance the protective safety performance.

+High technical performance:the main parameters reach advanced level in domestic.

Environmental Conditions

a   The temperature range is-5℃to +40℃,and the average temperature in 24 hours is no higher than +35℃ .

b   Atmospheric  conditions:air  is  clean,relative humidity is lower than 50%at+40℃,and higher relative humidity is allowed at lower temperatures,eg.90%at +20°C.But in view of the temperature change,it is possible that moderate condensation will be produced casually

C Altitude above sea level should not exceed 2000m.

dThe device is suitable for transportation and storing at the following temperatures:-25℃~+55℃,it can reach +70°C in  a short time(within 24 hours).Under the limiting temperature,it can work well under normal conditions if it doesn’t suffer damage that can’t be recovered.

e If above working conditions cannot be met,the user should negotiate with manufacturer.

f If the device is to be used in marine petroleum driling platform or nuclear power,another technical agreement needs to be signed.

Rated Working Current of Vertical Busbar

Withdrawable type MCC with single side or double sides operation:800A.MCC with 1000mm depth and single side operation:800-2000A