What is a 10kV switch cabinet?

Outgoing cabinet: it is the switch cabinet that distributes electric energy from the bus to the power transformer. This switch cabinet is one of the 10kV outgoing cabinets Composition: three groups of three coil current transformers, disconnectors, circuit breakers, knife switches and live display devices

What is the surface heat transfer coefficient of a switchgear cabinet?

The switchgear cabinet surface is set as the third boundary condition, with surface heat transfer coefficient h = 10 W/ (m 2 ∙K). Surface-to-surface radiation occurs between the conductive circuit, insulated component, and the cabinet wall, where the conductive circuit surface emissivity is ε2 = 0.5.

What is the maximum temperature rise of a switchgear?

The heat field results reveal that even in the condition of passing through current with long operation time, the maximum temperature rise of the switchgear is 55.9 K and 48.7 K respectively, which is lower than the standard design requirement 70 K.

Can high-voltage switchgear improve the reliability and safety of power supply?

In order to improve the reliability and safety of power supply and reduce the failure rate of switchgear, this paper designs a novel high-voltage switchgear which is reliable and safe.

How does the cooling efficiency of the switchgear depend on convection heat dissipation?

As can be seen in Eq. (20), the cooling efficiency of the switchgear depends on the convection heat dissipation and the fan power. In this paper, the German ebmpapst A2E200-AI38-01 axial fan is selected, and its corresponding power curve is shown in Fig. 10.

Can a switchgear temperature rise under natural convection?

It was found that the temperature rise of the switchgear cannot reach the IEEE standard (temperature rise less than 65 °C) under natural convection, and forced convection must be adopted to ensure the safe operation of the switchgear.