The Aderis ClearSky™ Interconnection is designed to electrically terminate in the same manner as a pad-mounted transformer. Here’s what you can expect.

Overview

The Aderis ClearSky is designed to be very easy to install, requiring only medium voltage (MV) and ground-ring terminations that are similar to that of a pad-mount transformer.

Details for your MV Contractor:

• There are a total of six (6) MV separable connector terminations required; three (3) for the Utility side, and three (3) for the Solar side.
• The MV separable connectors will be either 200A load-break or 1600A dead-break IEEE 386 compatible interfaces.
• Whether 200A or 600A, all bushing wells and inserts will be shipped with the device … your MV contractor only needs to purchase and install the “elbows”.
• Parking stands are installed for all six (6) connections, however parking bushings are not included (as these are not required for normal commercial operation).
• Both MV termination cabinets (Utility and Solar) each have a solid copper 3/8” diameter rod installed across the bottom opening of the cabinet entry. The ground ring will need to be attached to the grounding rod per applicable standards where the Aderis ClearSky is being installed.

Utility Side MV Terminations

All metering and protection relay current measurements are measured from the Utility side of the Aderis ClearSky. To ensure the current transformers (CTs) are easily serviceable, all six (6) CTs are installed outside the central switching cabinet.

The CTs are bolted to slotted strut to allow for horizontal positioning, and even temporary removal to accommodate MV conductor pulls and routing. In extreme MV cable management scenarios the CTs may be left unmounted, so long as the phase, orientation, and control wiring is not modified. Aderis applies phase labels to each CT that indicate “Up” and “Top” for each CT to help avoid a CT from being “flipped” in the event it is unmounted during MV cable installation.

CTs are solid core and require being slipped over the MV conductor. The CTs have been specified with large center openings to ensure they may be installed over and removed from standard elbow terminations.

                                         Fully Terminated Utility Side MV Conductors

NOTE: All concentric neutrals and bleed wires should pass through the center of the CTs (as shown above).

Solar Side MV Terminations

All Solar side terminations are identical to the Utility side, with one large exception … the A, B, C phasing is in reverse: C, B, A from left-to-right. The Aderis ClearSky uses bus bars that pass from the Utility side to the Solar side, thought the central switching cabinet, and never cross. For this reason, the phasing is reversed on the opposite side of the cabinet.