Column Control DTX

Solar Array Simulation System Integration

Technical Overviews

Introduction

When laying out the design of an E4360A solar array simulator (SAS) system, steps can be taken up front to ensure proper and reliable system operation. Pay special attention to the following four areas of the design:

1. Racking the E4360A (SAS) mainframes

2. Heat considerations inside the rack

3. AC power requirements for the system

4. Other considerations

Racking the E4360A SAS mainframe

When assembling the system with E4360A SAS mainframes, be careful not to block the air flow. The mainframe is 2U high; if you are using standard rails, they will cover a portion of the perforated vents on the side of the instrument and impede the air flow, causing the instrument to overheat. The manual gives specific instructions about how to rack mount the E4360A using rack kits sold with the instrument.

The E4360A has

2 different air lows:

a. In the front of the E4360A, where the AC/DC inverters are, the air flow is from side to side. Therefore, when connecting two racks next to each other, be sure to leave a minimum of 3” spacing between two adjacent E4360A mainframes.

b. The main cooling is from the sides to the rear. Therefore, it is important not to block the perforations on the sides and the rear exit. Using standard rack mount rails is not acceptable.

Heat considerations

The main heat source inside the rack is the heat generated from the E4360A SAS. This power supply has a DC/DC converter front end with a linear regulation output that allows it to generate the fast response time required. There are two outputs (modules) in each E4360A mainframe. Each output is capable of generating 600W to the load for a total of 1200W in 2U of rack space. Since the internal regulator is a DC/ DC converter with a linear post regulator, heat dissipation inside a module is dependent on the load.

Extracting the heat out of the rack

When you integrate a system with multiple mainframes, Keysight Technologies, Inc. strongly recommends leaving 1U of rack space between mainframes to draw in outside air.

Once the system is configured, the number of mainframes is known, the type of modules and type of

regulation are decided upon, then you should calculate the total power dissipated inside the rack. You can then decide the type and number of fans required to keep the temperature inside the rack within the operating temperature of the modules (40 ° C without current derating). If you assume the ambient temperature outside the rack is 25 ° C, the delta temperature inside the rack should not be greater than 15 ° C.

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Column Control DTX