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MNSLow voltage draw out switchgear

This series of low-voltage draw out switchgear is a combined cabinet type assembled by factory (FBA) with standard modules. The products are used in power plants, substations, petrochemical industry, light industry and textile, metallurgical steel rolling, airports, schools and high-rise buildings. They are used as power, lighting and It is used for electric energy acceptance and distribution of motor centralized control and distribution equipment.
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Product overview

This series of low-voltage draw out switchgear is a combined cabinet type assembled by factory (FBA) with standard modules. The products are used in power plants, substations, petrochemical industry, light industry and textile, metallurgical steel rolling, airports, schools and high-rise buildings. They are used as power, lighting and It is used for electric energy acceptance and distribution of motor centralized control and distribution equipment.

This product complies with the national professional standards of GB7251 low voltage switchgear and control equipment, JB / t9961 low voltage withdrawable switchgear and iec439-1 international professional standard.

 

Model meaning

M N S
Modularization and modularization new type electrical system Main circuit scheme code Auxiliary circuit scheme code

 

Working conditions
◊ The ambient air temperature is not higher than + 40 ℃, not lower than - 5 ° C, and the 24h average temperature is not higher than + 35 ° C;
◊ The surrounding air is clean, and the relative humidity shall not exceed 50% at the maximum temperature of + 40 ° C. higher relative humidity is allowed at lower temperature, such as 90% at + 25 ° C, but it shall be considered that moderate condensation may occur occasionally due to temperature change;
◊ For indoor use, the altitude shall not exceed 2000m, and there shall be no significant shaking and impact vibration;
◊ Pollution level: Level 3;
◊ Seismic intensity: Grade 8;
◊ The temperature of the switch cabinet during transportation and storage can be between - 25 ° C and 55 ° C, and the temperature can reach + 70 ° C in a short time (no more than 24h).

 

Technical parameter

Name GB7251. 1-2013 low voltage switchgear and control equipment (TTA)
Iec61439 low voltage switchgear and controlgear assemblies
Overvoltage category

IV III

class of pollution

3

Rated working voltage(Ue)(V)

400/660

Rated insulation voltage(Ui)(V)

660/1000

Rated frequency

(Hz)

50(60)

Horizontal bus Rated current

<5000A

  Rated short-time withstand current (LCW) (KA)

50,65,80(ls Effective value)

 

Rated peak current(lpk)(kA)

105,140,176(0.1s Maximum)

Vertical bus B Rated working current

<1000A

  Rated short-time withstand current

50kA

  Rated withstand current

105kA

Enclosure protection class

IP30IP40(Special instructions)

 

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